Corrected version of 4b5e05c084f93c35dae946c2c9e814d565a613b0:

    Fix some more signed -> unsigned value issues with cache data structures,
    also misc. style cleanups.  All to align w/incoming page_buffering changes.

12 files changed, 229 insertions, 315 deletions

diff --git a/src/H5ACmpio.c b/src/H5ACmpio.c
index 44ffd9d..945aaba 100644
--- a/src/H5ACmpio.c
+++ b/src/H5ACmpio.c
@@ -81,7 +81,7 @@ typedef struct H5AC_addr_list_ud_t
 {
     H5AC_aux_t    * aux_ptr;        /* 'Auxiliary' parallel cache info */
     haddr_t       * addr_buf_ptr;   /* Array to store addresses */
-    int             i;              /* Counter for position in array */
+    unsigned        u;              /* Counter for position in array */
 } H5AC_addr_list_ud_t;
 
 
@@ -90,21 +90,21 @@ typedef struct H5AC_addr_list_ud_t
 /********************/
 
 static herr_t H5AC__broadcast_candidate_list(H5AC_t *cache_ptr,
-    int *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
+    unsigned *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
 static herr_t H5AC__broadcast_clean_list(H5AC_t *cache_ptr);
 static herr_t H5AC__construct_candidate_list(H5AC_t *cache_ptr,
     H5AC_aux_t *aux_ptr, int sync_point_op);
 static herr_t H5AC__copy_candidate_list_to_buffer(const H5AC_t *cache_ptr,
-    int *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
+    unsigned *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
 static herr_t H5AC__propagate_and_apply_candidate_list(H5F_t  *f, hid_t dxpl_id);
 static herr_t H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f,
     hid_t dxpl_id);
-static herr_t H5AC__receive_haddr_list(MPI_Comm mpi_comm, int *num_entries_ptr,
+static herr_t H5AC__receive_haddr_list(MPI_Comm mpi_comm, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr);
 static herr_t H5AC__receive_candidate_list(const H5AC_t *cache_ptr,
-    int *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
+    unsigned *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
 static herr_t H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id);
-static herr_t H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, int num_candidates,
+static herr_t H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, unsigned num_candidates,
     haddr_t *candidates_list_ptr);
 static herr_t H5AC__rsp__dist_md_write__flush(H5F_t *f, hid_t dxpl_id);
 static herr_t H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f, hid_t dxpl_id);
@@ -151,7 +151,7 @@ H5FL_DEFINE_STATIC(H5AC_slist_entry_t);
  */
 herr_t
 H5AC__set_sync_point_done_callback(H5C_t * cache_ptr,
-    void (* sync_point_done)(int num_writes, haddr_t * written_entries_tbl))
+    void (* sync_point_done)(unsigned num_writes, haddr_t * written_entries_tbl))
 {
     H5AC_aux_t * aux_ptr;
 
@@ -282,13 +282,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__broadcast_candidate_list(H5AC_t *cache_ptr, int *num_entries_ptr,
+H5AC__broadcast_candidate_list(H5AC_t *cache_ptr, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr)
 {
     H5AC_aux_t         * aux_ptr = NULL;
     haddr_t            * haddr_buf_ptr = NULL;
     int                  mpi_result;
-    int			 num_entries;
+    unsigned		 num_entries;
     herr_t               ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -310,13 +310,13 @@ H5AC__broadcast_candidate_list(H5AC_t *cache_ptr, int *num_entries_ptr,
      * receivers can set up buffers to receive them.  If there aren't
      * any, we are done.
      */
-    num_entries = (int)H5SL_count(aux_ptr->candidate_slist_ptr);
-    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_INT, 0, aux_ptr->mpi_comm)))
+    num_entries = (unsigned)H5SL_count(aux_ptr->candidate_slist_ptr);
+    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_UNSIGNED, 0, aux_ptr->mpi_comm)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_result)
 
     if(num_entries > 0) {
         size_t		 buf_size = 0;
-        int		 chk_num_entries = 0;
+        unsigned	 chk_num_entries = 0;
 
         /* convert the candidate list into the format we
          * are used to receiving from process 0, and also load it 
@@ -328,7 +328,7 @@ H5AC__broadcast_candidate_list(H5AC_t *cache_ptr, int *num_entries_ptr,
         HDassert(haddr_buf_ptr != NULL);
 
         /* Now broadcast the list of candidate entries */
-        buf_size = sizeof(haddr_t) * (size_t)num_entries;
+        buf_size = sizeof(haddr_t) * num_entries;
         if(MPI_SUCCESS != (mpi_result = MPI_Bcast((void *)haddr_buf_ptr, (int)buf_size, MPI_BYTE, 0, aux_ptr->mpi_comm)))
             HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_result)
     } /* end if */
@@ -378,8 +378,8 @@ H5AC__broadcast_clean_list_cb(void *_item, void H5_ATTR_UNUSED *_key,
 
     /* Store the entry's address in the buffer */
     addr = slist_entry_ptr->addr;
-    udata->addr_buf_ptr[udata->i] = addr;
-    udata->i++;
+    udata->addr_buf_ptr[udata->u] = addr;
+    udata->u++;
 
     /* now release the entry */
     slist_entry_ptr = H5FL_FREE(H5AC_slist_entry_t, slist_entry_ptr);
@@ -420,7 +420,7 @@ H5AC__broadcast_clean_list(H5AC_t * cache_ptr)
     haddr_t	       * addr_buf_ptr = NULL;
     H5AC_aux_t         * aux_ptr;
     int                  mpi_result;
-    int			 num_entries = 0;
+    unsigned		 num_entries = 0;
     herr_t               ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -437,8 +437,8 @@ H5AC__broadcast_clean_list(H5AC_t * cache_ptr)
      * receives can set up a buffer to receive them.  If there aren't
      * any, we are done.
      */
-    num_entries = (int)H5SL_count(aux_ptr->c_slist_ptr);
-    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_INT, 0, aux_ptr->mpi_comm)))
+    num_entries = (unsigned)H5SL_count(aux_ptr->c_slist_ptr);
+    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_UNSIGNED, 0, aux_ptr->mpi_comm)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_result)
 
     if(num_entries > 0) {
@@ -446,14 +446,14 @@ H5AC__broadcast_clean_list(H5AC_t * cache_ptr)
         size_t		 buf_size;
 
         /* allocate a buffer to store the list of entry base addresses in */
-        buf_size = sizeof(haddr_t) * (size_t)num_entries;
+        buf_size = sizeof(haddr_t) * num_entries;
         if(NULL == (addr_buf_ptr = (haddr_t *)H5MM_malloc(buf_size)))
             HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for addr buffer")
 
         /* Set up user data for callback */
         udata.aux_ptr = aux_ptr;
         udata.addr_buf_ptr = addr_buf_ptr;
-        udata.i = 0;
+        udata.u = 0;
 
         /* Free all the clean list entries, building the address list in the callback */
         /* (Callback also removes the matching entries from the dirtied list) */
@@ -568,8 +568,8 @@ H5AC__copy_candidate_list_to_buffer_cb(void *_item, void H5_ATTR_UNUSED *_key,
     HDassert(udata);
 
     /* Store the entry's address in the buffer */
-    udata->addr_buf_ptr[udata->i] = slist_entry_ptr->addr;
-    udata->i++;
+    udata->addr_buf_ptr[udata->u] = slist_entry_ptr->addr;
+    udata->u++;
 
     /* now release the entry */
     slist_entry_ptr = H5FL_FREE(H5AC_slist_entry_t, slist_entry_ptr);
@@ -610,14 +610,14 @@ H5AC__copy_candidate_list_to_buffer_cb(void *_item, void H5_ATTR_UNUSED *_key,
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__copy_candidate_list_to_buffer(const H5AC_t *cache_ptr, int *num_entries_ptr,
+H5AC__copy_candidate_list_to_buffer(const H5AC_t *cache_ptr, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr)
 {
     H5AC_aux_t         * aux_ptr = NULL;
     H5AC_addr_list_ud_t  udata;
     haddr_t            * haddr_buf_ptr = NULL;
     size_t		 buf_size;
-    int			 num_entries = 0;
+    unsigned		 num_entries = 0;
     herr_t               ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -635,19 +635,19 @@ H5AC__copy_candidate_list_to_buffer(const H5AC_t *cache_ptr, int *num_entries_pt
     HDassert(haddr_buf_ptr_ptr != NULL);
     HDassert(*haddr_buf_ptr_ptr == NULL);
 
-    num_entries = (int)H5SL_count(aux_ptr->candidate_slist_ptr);
+    num_entries = (unsigned)H5SL_count(aux_ptr->candidate_slist_ptr);
 
     /* allocate a buffer(s) to store the list of candidate entry 
      * base addresses in 
      */
-    buf_size = sizeof(haddr_t) * (size_t)num_entries;
+    buf_size = sizeof(haddr_t) * num_entries;
     if(NULL == (haddr_buf_ptr = (haddr_t *)H5MM_malloc(buf_size)))
         HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for haddr buffer")
 
     /* Set up user data for callback */
     udata.aux_ptr = aux_ptr;
     udata.addr_buf_ptr = haddr_buf_ptr;
-    udata.i = 0;
+    udata.u = 0;
 
     /* Free all the candidate list entries, building the address list in the callback */
     if(H5SL_free(aux_ptr->candidate_slist_ptr, H5AC__copy_candidate_list_to_buffer_cb, &udata) < 0)
@@ -1234,7 +1234,7 @@ H5AC__propagate_and_apply_candidate_list(H5F_t  *f, hid_t dxpl_id)
     H5AC_aux_t         * aux_ptr;
     haddr_t            * candidates_list_ptr = NULL;
     int		         mpi_result;
-    int	                 num_candidates = 0;
+    unsigned	         num_candidates = 0;
     herr_t               ret_value = SUCCEED;   /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1448,12 +1448,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__receive_haddr_list(MPI_Comm mpi_comm, int *num_entries_ptr,
+H5AC__receive_haddr_list(MPI_Comm mpi_comm, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr)
 {
     haddr_t	       * haddr_buf_ptr = NULL;
     int                  mpi_result;
-    int			 num_entries;
+    unsigned		 num_entries;
     herr_t               ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1468,14 +1468,14 @@ H5AC__receive_haddr_list(MPI_Comm mpi_comm, int *num_entries_ptr,
      * can set up a buffer to receive them.  If there aren't
      * any, we are done.
      */
-    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_INT, 0, mpi_comm)))
+    if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&num_entries, 1, MPI_UNSIGNED, 0, mpi_comm)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_result)
 
     if(num_entries > 0) {
         size_t buf_size;
 
         /* allocate buffers to store the list of entry base addresses in */
-        buf_size = sizeof(haddr_t) * (size_t)num_entries;
+        buf_size = sizeof(haddr_t) * num_entries;
         if(NULL == (haddr_buf_ptr = (haddr_t *)H5MM_malloc(buf_size)))
             HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for haddr buffer")
 
@@ -1523,7 +1523,7 @@ H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id)
     H5AC_t             * cache_ptr;
     H5AC_aux_t         * aux_ptr;
     haddr_t	       * haddr_buf_ptr = NULL;
-    int			 num_entries = 0;
+    unsigned		 num_entries = 0;
     herr_t               ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1543,7 +1543,7 @@ H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id)
 
     if(num_entries > 0)
         /* mark the indicated entries as clean */
-        if(H5C_mark_entries_as_clean(f, dxpl_id, (int32_t)num_entries, haddr_buf_ptr) < 0)
+        if(H5C_mark_entries_as_clean(f, dxpl_id, num_entries, haddr_buf_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't mark entries clean.")
 
     /* if it is defined, call the sync point done callback.  Note
@@ -1582,7 +1582,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__receive_candidate_list(const H5AC_t *cache_ptr, int *num_entries_ptr,
+H5AC__receive_candidate_list(const H5AC_t *cache_ptr, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr)
 {
     H5AC_aux_t         * aux_ptr;
@@ -1667,7 +1667,7 @@ H5AC__rsp__dist_md_write__flush(H5F_t *f, hid_t dxpl_id)
     H5AC_aux_t * aux_ptr;
     haddr_t    * haddr_buf_ptr = NULL;
     int		 mpi_result;
-    int          num_entries = 0;
+    unsigned     num_entries = 0;
     herr_t	 ret_value = SUCCEED;   /* Return value */
 
     FUNC_ENTER_STATIC
@@ -2224,11 +2224,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, int num_candidates,
+H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, unsigned num_candidates,
     haddr_t *candidates_list_ptr)
 {
     H5AC_aux_t         * aux_ptr;
-    int                  i;
+    unsigned             u;
 
     FUNC_ENTER_STATIC_NOERR
 
@@ -2249,12 +2249,12 @@ H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, int num_candidates,
      * cleaned list.  However, for this metadata write strategy, 
      * we just want to remove all references to the candidate entries.
      */
-    for(i = 0; i < num_candidates; i++) {
+    for(u = 0; u < num_candidates; u++) {
         H5AC_slist_entry_t * d_slist_entry_ptr;
         H5AC_slist_entry_t * c_slist_entry_ptr;
         haddr_t              addr;
 
-        addr = candidates_list_ptr[i];
+        addr = candidates_list_ptr[u];
 
         /* addr may be either on the dirtied list, or on the flushed 
          * and still clean list.  Remove it.
diff --git a/src/H5ACpkg.h b/src/H5ACpkg.h
index 816f1d5..77ba0ae 100644
--- a/src/H5ACpkg.h
+++ b/src/H5ACpkg.h
@@ -404,7 +404,7 @@ typedef struct H5AC_aux_t
 
     void	(* write_done)(void);
 
-    void	(* sync_point_done)(int num_writes, 
+    void	(* sync_point_done)(unsigned num_writes, 
                                     haddr_t * written_entries_tbl);
 
     unsigned    p0_image_len;
@@ -430,7 +430,7 @@ H5_DLL herr_t H5AC__log_moved_entry(const H5F_t *f, haddr_t old_addr,
 H5_DLL herr_t H5AC__flush_entries(H5F_t *f, hid_t dxpl_id);
 H5_DLL herr_t H5AC__run_sync_point(H5F_t *f, hid_t dxpl_id, int sync_point_op);
 H5_DLL herr_t H5AC__set_sync_point_done_callback(H5C_t *cache_ptr,
-    void (*sync_point_done)(int num_writes, haddr_t *written_entries_tbl));
+    void (*sync_point_done)(unsigned num_writes, haddr_t *written_entries_tbl));
 H5_DLL herr_t H5AC__set_write_done_callback(H5C_t * cache_ptr,
     void (* write_done)(void));
 #endif /* H5_HAVE_PARALLEL */
diff --git a/src/H5C.c b/src/H5C.c
index 4601d35..fe97f05 100644
--- a/src/H5C.c
+++ b/src/H5C.c
@@ -1470,6 +1470,11 @@ H5C_insert_entry(H5F_t *             f,
     entry_ptr->aux_next = NULL;
     entry_ptr->aux_prev = NULL;
 
+#ifdef H5_HAVE_PARALLEL
+    entry_ptr->coll_next = NULL;
+    entry_ptr->coll_prev = NULL;
+#endif /* H5_HAVE_PARALLEL */
+
     /* initialize cache image related fields */
     entry_ptr->include_in_image 		= FALSE;
     entry_ptr->lru_rank         		= 0;
@@ -1486,11 +1491,6 @@ H5C_insert_entry(H5F_t *             f,
     entry_ptr->serialization_count		= 0;
 #endif /* NDEBUG */
 
-#ifdef H5_HAVE_PARALLEL
-    entry_ptr->coll_next = NULL;
-    entry_ptr->coll_prev = NULL;
-#endif /* H5_HAVE_PARALLEL */
-
     /* Apply tag to newly inserted entry */
     if(H5C__tag_entry(cache_ptr, entry_ptr, dxpl_id) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "Cannot tag metadata entry")
diff --git a/src/H5Cdbg.c b/src/H5Cdbg.c
index f926c71..205567f 100644
--- a/src/H5Cdbg.c
+++ b/src/H5Cdbg.c
@@ -211,7 +211,7 @@ H5C_dump_cache_skip_list(H5C_t * cache_ptr, char * calling_fcn)
     HDassert(calling_fcn != NULL);
 
     HDfprintf(stdout, "\n\nDumping metadata cache skip list from %s.\n", calling_fcn);
-    HDfprintf(stdout, "	slist len = %d.\n", cache_ptr->slist_len);
+    HDfprintf(stdout, "	slist len = %u.\n", cache_ptr->slist_len);
     HDfprintf(stdout, "	slist size = %lld.\n", (long long)(cache_ptr->slist_size));
 
     if(cache_ptr->slist_len > 0) {
@@ -651,11 +651,11 @@ H5C_stats(H5C_t * cache_ptr,
               (long long)(cache_ptr->index_scan_restarts));
 
     HDfprintf(stdout,
-	      "%s  cache image creations/loads/size   = %d / %d / %lld\n",
+	      "%s  cache image creations/loads/size   = %d / %d / %Hu\n",
               cache_ptr->prefix,
               cache_ptr->images_created,
               cache_ptr->images_loaded,
-              (long long)cache_ptr->last_image_size);
+              cache_ptr->last_image_size);
 
     HDfprintf(stdout,
 	      "%s  prefetches / dirty prefetches      = %lld / %lld\n",
@@ -905,7 +905,7 @@ H5C_stats__reset(H5C_t H5_ATTR_UNUSED * cache_ptr)
 
     cache_ptr->images_created           = 0;
     cache_ptr->images_loaded            = 0;
-    cache_ptr->last_image_size          = (size_t)0;
+    cache_ptr->last_image_size          = (hsize_t)0;
 
     cache_ptr->prefetches               = 0;
     cache_ptr->dirty_prefetches			= 0;
diff --git a/src/H5Cmpio.c b/src/H5Cmpio.c
index 137e21d..8f8b5c6 100644
--- a/src/H5Cmpio.c
+++ b/src/H5Cmpio.c
@@ -164,38 +164,13 @@ static herr_t H5C__collective_write(H5F_t *f, hid_t dxpl_id);
  * Programmer:  John Mainzer
  *              3/17/10
  *
- * Changes:     Ported code to detect next entry status changes as the 
- *              the result of a flush from the serial code in the scan of 
- *              the LRU.  Also added code to detect and adapt to the 
- *              removal from the cache of the next entry in the scan of 
- *		the LRU.
- *
- *		Note that at present, all of these changes should not 
- *		be required as the operations on entries as they are 
- *		flushed that can cause these condiditions are not premitted
- *		in the parallel case.  However, Quincey indicates that 
- *		this may change, and thus has requested the modification.
- *
- *		Note the assert(FALSE) in the if statement whose body 
- *		restarts the scan of the LRU.  As the body of the if 
- *		statement should be unreachable, it should never be 
- *		triggered until the constraints on the parallel case 
- *		are relaxed.  Please remove the assertion at that time.
- *
- *		Also added warning on the Pinned Entry List scan, as it
- *		is potentially subject to the same issue.  As there is 
- *		no cognate of this scan in the serial code, I don't have
- *		a fix to port to it.
- *
- *						JRM -- 4/10/19
- *		
  *-------------------------------------------------------------------------
  */
 herr_t
 H5C_apply_candidate_list(H5F_t * f,
                          hid_t dxpl_id,
                          H5C_t * cache_ptr,
-                         int num_candidates,
+                         unsigned num_candidates,
                          haddr_t * candidates_list_ptr,
                          int mpi_rank,
                          int mpi_size)
@@ -205,19 +180,19 @@ H5C_apply_candidate_list(H5F_t * f,
     int                 i;
     int			m;
     int			n;
-    int			first_entry_to_flush;
-    int			last_entry_to_flush;
-    int			entries_to_clear = 0;
-    int			entries_to_flush = 0;
-    int			entries_to_flush_or_clear_last = 0;
-    int			entries_to_flush_collectively = 0;
-    int			entries_cleared = 0;
-    int			entries_flushed = 0;
-    int			entries_delayed = 0;
-    int			entries_flushed_or_cleared_last = 0;
-    int			entries_flushed_collectively = 0;
-    int			entries_examined = 0;
-    int			initial_list_len;
+    unsigned		first_entry_to_flush;
+    unsigned		last_entry_to_flush;
+    unsigned		entries_to_clear = 0;
+    unsigned		entries_to_flush = 0;
+    unsigned		entries_to_flush_or_clear_last = 0;
+    unsigned		entries_to_flush_collectively = 0;
+    unsigned		entries_cleared = 0;
+    unsigned		entries_flushed = 0;
+    unsigned		entries_delayed = 0;
+    unsigned		entries_flushed_or_cleared_last = 0;
+    unsigned		entries_flushed_collectively = 0;
+    unsigned		entries_examined = 0;
+    unsigned		initial_list_len;
     int               * candidate_assignment_table = NULL;
     haddr_t		addr;
     H5C_cache_entry_t *	clear_ptr = NULL;
@@ -231,6 +206,7 @@ H5C_apply_candidate_list(H5F_t * f,
 #if H5C_APPLY_CANDIDATE_LIST__DEBUG
     char		tbl_buf[1024];
 #endif /* H5C_APPLY_CANDIDATE_LIST__DEBUG */
+    unsigned            u;
     herr_t              ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -250,8 +226,8 @@ H5C_apply_candidate_list(H5F_t * f,
     HDmemset(tbl_buf, 0, sizeof(tbl_buf));
 
     sprintf(&(tbl_buf[0]), "candidate list = ");
-    for(i = 0; i < num_candidates; i++)
-        sprintf(&(tbl_buf[HDstrlen(tbl_buf)]), " 0x%llx", (long long)(*(candidates_list_ptr + i)));
+    for(u = 0; u < num_candidates; u++)
+        sprintf(&(tbl_buf[HDstrlen(tbl_buf)]), " 0x%llx", (long long)(*(candidates_list_ptr + u)));
     sprintf(&(tbl_buf[HDstrlen(tbl_buf)]), "\n");
 
     HDfprintf(stdout, "%s", tbl_buf);
@@ -321,18 +297,18 @@ H5C_apply_candidate_list(H5F_t * f,
     sprintf(&(tbl_buf[HDstrlen(tbl_buf)]), "\n");
     HDfprintf(stdout, "%s", tbl_buf);
 
-    HDfprintf(stdout, "%s:%d: flush entries [%d, %d].\n", 
+    HDfprintf(stdout, "%s:%d: flush entries [%u, %u].\n", 
               FUNC, mpi_rank, first_entry_to_flush, last_entry_to_flush);
 
     HDfprintf(stdout, "%s:%d: marking entries.\n", FUNC, mpi_rank);
 #endif /* H5C_APPLY_CANDIDATE_LIST__DEBUG */
 
-    for(i = 0; i < num_candidates; i++) {
-        addr = candidates_list_ptr[i];
+    for(u = 0; u < num_candidates; u++) {
+        addr = candidates_list_ptr[u];
         HDassert(H5F_addr_defined(addr));
 
 #if H5C_DO_SANITY_CHECKS
-        if(i > 0) {
+        if(u > 0) {
             if(last_addr == addr)
                 HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "duplicate entry in cleaned list")
             else if(last_addr > addr)
@@ -352,36 +328,37 @@ H5C_apply_candidate_list(H5F_t * f,
              * If we encounter one, scream and die.  If it becomes an
              * issue, we should be able to work around this. 
              */
-            HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Listed entry is protected?!?!?.")
-            /* Determine whether the entry is to be cleared or flushed,
-             * and mark it accordingly.  We will scan the protected and 
-             * pinned list shortly, and clear or flush according to these
-             * markings.  
-             */
-            if(i >= first_entry_to_flush && i <= last_entry_to_flush) {
-                entries_to_flush++;
-                entry_ptr->flush_immediately = TRUE;
-            } /* end if */
-            else {
-                entries_to_clear++;
-                entry_ptr->clear_on_unprotect = TRUE;
-            } /* end else */
-
-            /* Entries marked as collectively accessed and are in the
-               candidate list to clear from the cache have to be
-               removed from the coll list. This is OK since the
-               candidate list is collective and uniform across all
-               ranks. */
-            if(entry_ptr->coll_access) {
-                entry_ptr->coll_access = FALSE;
-                H5C__REMOVE_FROM_COLL_LIST(cache_ptr, entry_ptr, FAIL)
-            } /* end if */
+            HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Listed entry is protected?!?!?")
+
+        /* Determine whether the entry is to be cleared or flushed,
+         * and mark it accordingly.  We will scan the protected and 
+         * pinned list shortly, and clear or flush according to these
+         * markings.  
+         */
+        if(u >= first_entry_to_flush && u <= last_entry_to_flush) {
+            entries_to_flush++;
+            entry_ptr->flush_immediately = TRUE;
+        } /* end if */
+        else {
+            entries_to_clear++;
+            entry_ptr->clear_on_unprotect = TRUE;
+        } /* end else */
+
+        /* Entries marked as collectively accessed and are in the
+           candidate list to clear from the cache have to be
+           removed from the coll list. This is OK since the
+           candidate list is collective and uniform across all
+           ranks. */
+        if(entry_ptr->coll_access) {
+            entry_ptr->coll_access = FALSE;
+            H5C__REMOVE_FROM_COLL_LIST(cache_ptr, entry_ptr, FAIL)
+        } /* end if */
     } /* end for */
 
 #if H5C_APPLY_CANDIDATE_LIST__DEBUG
-    HDfprintf(stdout, "%s:%d: num candidates/to clear/to flush = %d/%d/%d.\n", 
-              FUNC, mpi_rank, (int)num_candidates, (int)entries_to_clear,
-              (int)entries_to_flush);
+    HDfprintf(stdout, "%s:%d: num candidates/to clear/to flush = %u/%u/%u.\n", 
+              FUNC, mpi_rank, num_candidates, entries_to_clear,
+              entries_to_flush);
 #endif /* H5C_APPLY_CANDIDATE_LIST__DEBUG */
 
     /* We have now marked all the entries on the candidate list for 
@@ -580,7 +557,7 @@ H5C_apply_candidate_list(H5F_t * f,
     } /* end while */
 
 #if H5C_APPLY_CANDIDATE_LIST__DEBUG
-    HDfprintf(stdout, "%s:%d: entries examined/cleared/flushed = %d/%d/%d.\n",
+    HDfprintf(stdout, "%s:%d: entries examined/cleared/flushed = %u/%u/%u.\n",
               FUNC, mpi_rank, entries_examined,
               entries_cleared, entries_flushed);
 #endif /* H5C_APPLY_CANDIDATE_LIST__DEBUG */
@@ -707,7 +684,7 @@ H5C_apply_candidate_list(H5F_t * f,
 
 #if H5C_APPLY_CANDIDATE_LIST__DEBUG
     HDfprintf(stdout,
-              "%s:%d: pel entries examined/cleared/flushed = %d/%d/%d.\n",
+              "%s:%d: pel entries examined/cleared/flushed = %u/%u/%u.\n",
               FUNC, mpi_rank, entries_examined,
               entries_cleared, entries_flushed);
     HDfprintf(stdout, "%s:%d: done.\n", FUNC, mpi_rank);
@@ -768,7 +745,7 @@ H5C_apply_candidate_list(H5F_t * f,
            (entries_cleared != entries_to_clear) ||
            (entries_flushed_or_cleared_last != entries_to_flush_or_clear_last) ||
            (entries_flushed_collectively != entries_to_flush_collectively))
-        HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry count mismatch.")
+        HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry count mismatch")
 
 done:
     if(candidate_assignment_table != NULL)
@@ -943,7 +920,7 @@ H5C_construct_candidate_list__min_clean(H5C_t * cache_ptr)
 
     if(space_needed > 0) { /* we have work to do */
         H5C_cache_entry_t *entry_ptr;
-        int    nominated_entries_count = 0;
+        unsigned nominated_entries_count = 0;
         size_t nominated_entries_size = 0;
 
         HDassert( cache_ptr->slist_len > 0 );
@@ -1010,51 +987,28 @@ done:
  * Programmer:  John Mainzer
  *              7/5/05
  *
- * Changes:     Tidied up code, removeing some old commented out 
- *		code that had been left in pending success of the 
- *		new version.
- *
- *		Note that unlike H5C_apply_candidate_list(), 
- *		H5C_mark_entries_as_clean() makes all its calls to 
- *		H5C__flush_single_entry() with the 
- *		H5C__FLUSH_CLEAR_ONLY_FLAG set.  As a result, 
- *		the pre_serialize() and serialize calls are not made.
- *
- *		This then implies that (assuming such actions were 
- *		permitted in the parallel case) no loads, dirties, 
- *		resizes, or removals of other entries can occur as 
- *		a side effect of the flush.  Hence, there is no need
- *		for the checks for entry removal / status change 
- *		that I ported to H5C_apply_candidate_list().
- *
- *		However, if (in addition to allowing such operations
- *		in the parallel case), we allow such operations outside
- *		of the pre_serialize / serialize routines, this may 
- *		cease to be the case -- requiring a review of this 
- *		function.
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5C_mark_entries_as_clean(H5F_t *  f,
                           hid_t     dxpl_id,
-                          int32_t   ce_array_len,
+                          unsigned  ce_array_len,
                           haddr_t * ce_array_ptr)
 {
     H5C_t *             cache_ptr;
-    int			entries_cleared;
-    int			entries_examined;
-    int                 i;
-    int			initial_list_len;
+    unsigned		entries_cleared;
+    unsigned		entries_examined;
+    unsigned		initial_list_len;
     haddr_t		addr;
 #if H5C_DO_SANITY_CHECKS
-    int			pinned_entries_marked = 0;
-    int			protected_entries_marked = 0;
-    int			other_entries_marked = 0;
+    unsigned		pinned_entries_marked = 0;
+    unsigned		protected_entries_marked = 0;
+    unsigned		other_entries_marked = 0;
     haddr_t		last_addr;
 #endif /* H5C_DO_SANITY_CHECKS */
     H5C_cache_entry_t *	clear_ptr = NULL;
     H5C_cache_entry_t *	entry_ptr = NULL;
+    unsigned            u;
     herr_t		ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -1075,11 +1029,11 @@ H5C_mark_entries_as_clean(H5F_t *  f,
         HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on entry")
 #endif /* H5C_DO_EXTREME_SANITY_CHECKS */
 
-    for(i = 0; i < ce_array_len; i++) {
-        addr = ce_array_ptr[i];
+    for(u = 0; u < ce_array_len; u++) {
+        addr = ce_array_ptr[u];
 
 #if H5C_DO_SANITY_CHECKS
-        if(i == 0)
+        if(u == 0)
             last_addr = addr;
         else {
             if(last_addr == addr)
@@ -1103,17 +1057,17 @@ H5C_mark_entries_as_clean(H5F_t *  f,
         if(entry_ptr == NULL) {
 #if H5C_DO_SANITY_CHECKS
 	    HDfprintf(stdout,
-                  "H5C_mark_entries_as_clean: entry[%d] = %ld not in cache.\n",
-                      (int)i,
-                      (long)addr);
+                  "H5C_mark_entries_as_clean: entry[%u] = %a not in cache.\n",
+                      u,
+                      addr);
 #endif /* H5C_DO_SANITY_CHECKS */
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Listed entry not in cache?!?!?")
         } /* end if */
         else if(!entry_ptr->is_dirty) {
 #if H5C_DO_SANITY_CHECKS
 	    HDfprintf(stdout,
-                      "H5C_mark_entries_as_clean: entry %ld is not dirty!?!\n",
-                      (long)addr);
+                      "H5C_mark_entries_as_clean: entry %a is not dirty!?!\n",
+                      addr);
 #endif /* H5C_DO_SANITY_CHECKS */
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Listed entry not dirty?!?!?")
         } /* end else-if */
@@ -1224,17 +1178,17 @@ H5C_mark_entries_as_clean(H5F_t *  f,
               ( (ce_array_len - entries_cleared) <= cache_ptr->pl_len ) );
 
 #if H5C_DO_SANITY_CHECKS
-    i = 0;
+    u = 0;
     entry_ptr = cache_ptr->pl_head_ptr;
     while ( entry_ptr != NULL )
     {
         if ( entry_ptr->clear_on_unprotect ) {
 
-            i++;
+            u++;
         }
         entry_ptr = entry_ptr->next;
     }
-    HDassert( (entries_cleared + i) == ce_array_len );
+    HDassert( (entries_cleared + u) == ce_array_len );
 #endif /* H5C_DO_SANITY_CHECKS */
 
 done:
@@ -1266,7 +1220,7 @@ done:
 herr_t
 H5C_clear_coll_entries(H5C_t *cache_ptr, hbool_t partial)
 { 
-    int32_t		clear_cnt;
+    uint32_t		clear_cnt;
     H5C_cache_entry_t *	entry_ptr = NULL;
     herr_t              ret_value = SUCCEED;
 
diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 566634b..26e932f 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -374,7 +374,6 @@ if ( ( (entry_ptr) == NULL ) ||                                                \
      ( ( ( (hd_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&                   \
        ( (hd_ptr) != (tail_ptr) )                                              \
      ) ||                                                                      \
-     ( (len) < 0 ) ||                                                          \
      ( ( (len) == 1 ) &&                                                       \
        ( ( (hd_ptr) != (tail_ptr) ) || ( (Size) <= 0 ) ||                      \
          ( (hd_ptr) == NULL ) || ( (hd_ptr)->size != (Size) )                  \
@@ -482,7 +481,7 @@ if ( ( (hd_ptr) == NULL ) ||                                                  \
        )                                                                      \
      )                                                                        \
    ) {                                                                        \
-    HDassert(0 && "il DLL pre remove SC failed"); \
+    HDassert(0 && "il DLL pre remove SC failed");                             \
     HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "il DLL pre remove SC failed")   \
 }
 
@@ -504,7 +503,7 @@ if ( ( (entry_ptr) == NULL ) ||                                               \
        )                                                                      \
      )                                                                        \
    ) {                                                                        \
-    HDassert(0 && "IL DLL pre insert SC failed"); \
+    HDassert(0 && "IL DLL pre insert SC failed");                             \
     HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "IL DLL pre insert SC failed")   \
 }
 
@@ -523,7 +522,7 @@ if ( ( ( ( (head_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&             \
        )                                                                   \
      )                                                                     \
    ) {                                                                     \
-    HDassert(0 && "IL DLL sanity check failed"); \
+    HDassert(0 && "IL DLL sanity check failed");                           \
     HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "IL DLL sanity check failed") \
 }
 
@@ -1008,8 +1007,7 @@ if ( ( (cache_ptr) == NULL ) ||                                         \
      ( (cache_ptr)->index_len != (cache_ptr)->il_len ) ||               \
      ( (cache_ptr)->index_size != (cache_ptr)->il_size ) ) {            \
     HDassert(FALSE);                                                    \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val,                        \
-               "Pre HT insert SC failed")                               \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val, "Pre HT insert SC failed") \
 }
 
 #define H5C__POST_HT_INSERT_SC(cache_ptr, entry_ptr, fail_val)          \
@@ -1031,8 +1029,7 @@ if ( ( (cache_ptr) == NULL ) ||                                         \
      ( (cache_ptr)->index_len != (cache_ptr)->il_len ) ||               \
      ( (cache_ptr)->index_size != (cache_ptr)->il_size) ) {             \
     HDassert(FALSE);                                                    \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val,                        \
-               "Post HT insert SC failed")                              \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val, "Post HT insert SC failed") \
 }
 
 #define H5C__PRE_HT_REMOVE_SC(cache_ptr, entry_ptr)                     \
@@ -1133,8 +1130,7 @@ if ( ( (cache_ptr) == NULL ) ||                                             \
        ( (entry_ptr)->ht_prev->ht_next != (entry_ptr) ) ) ||                \
      ( ( (entry_ptr)->ht_next != NULL ) &&                                  \
        ( (entry_ptr)->ht_next->ht_prev != (entry_ptr) ) ) ) {               \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val,                            \
-                "Post successful HT search SC failed")                      \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val, "Post successful HT search SC failed") \
 }
 
 /* (Keep in sync w/H5C_TEST__POST_HT_SHIFT_TO_FRONT macro in test/cache_common.h -QAK) */
@@ -1142,8 +1138,7 @@ if ( ( (cache_ptr) == NULL ) ||                                             \
 if ( ( (cache_ptr) == NULL ) ||                                        \
      ( ((cache_ptr)->index)[k] != (entry_ptr) ) ||                     \
      ( (entry_ptr)->ht_prev != NULL ) ) {                              \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val,                       \
-                "Post HT shift to front SC failed")                    \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, fail_val, "Post HT shift to front SC failed") \
 }
 
 #define H5C__PRE_HT_ENTRY_SIZE_CHANGE_SC(cache_ptr, old_size, new_size, \
@@ -1178,8 +1173,7 @@ if ( ( (cache_ptr) == NULL ) ||                                         \
      ( (cache_ptr)->index_len != (cache_ptr)->il_len ) ||               \
      ( (cache_ptr)->index_size != (cache_ptr)->il_size ) ) {            \
     HDassert(FALSE);                                                    \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                            \
-                "Pre HT entry size change SC failed")                   \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Pre HT entry size change SC failed") \
 }
 
 #define H5C__POST_HT_ENTRY_SIZE_CHANGE_SC(cache_ptr, old_size, new_size,  \
@@ -1209,8 +1203,7 @@ if ( ( (cache_ptr) == NULL ) ||                                           \
      ( (cache_ptr)->index_len != (cache_ptr)->il_len ) ||                 \
      ( (cache_ptr)->index_size != (cache_ptr)->il_size ) ) {              \
     HDassert(FALSE);                                                      \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                              \
-                "Post HT entry size change SC failed")                    \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Post HT entry size change SC failed") \
 }
 
 #define H5C__PRE_HT_UPDATE_FOR_ENTRY_CLEAN_SC(cache_ptr, entry_ptr)           \
@@ -1237,8 +1230,7 @@ if (                                                                          \
       ((cache_ptr)->clean_index_ring_size[(entry_ptr)->ring] +                \
        (cache_ptr)->dirty_index_ring_size[(entry_ptr)->ring]) ) ) {           \
     HDassert(FALSE);                                                          \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                                  \
-                "Pre HT update for entry clean SC failed")                    \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Pre HT update for entry clean SC failed") \
 }
 
 #define H5C__PRE_HT_UPDATE_FOR_ENTRY_DIRTY_SC(cache_ptr, entry_ptr)           \
@@ -1265,8 +1257,7 @@ if (                                                                          \
       ((cache_ptr)->clean_index_ring_size[(entry_ptr)->ring] +                \
        (cache_ptr)->dirty_index_ring_size[(entry_ptr)->ring]) ) ) {           \
     HDassert(FALSE);                                                          \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                                  \
-                "Pre HT update for entry dirty SC failed")                    \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Pre HT update for entry dirty SC failed") \
 }
 
 #define H5C__POST_HT_UPDATE_FOR_ENTRY_CLEAN_SC(cache_ptr, entry_ptr)        \
@@ -1282,8 +1273,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
        ((cache_ptr)->clean_index_ring_size[(entry_ptr)->ring] +             \
         (cache_ptr)->dirty_index_ring_size[(entry_ptr)->ring]) ) ) {        \
     HDassert(FALSE);                                                        \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                                \
-                "Post HT update for entry clean SC failed")                 \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Post HT update for entry clean SC failed") \
 }
 
 #define H5C__POST_HT_UPDATE_FOR_ENTRY_DIRTY_SC(cache_ptr, entry_ptr)        \
@@ -1299,8 +1289,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
        ((cache_ptr)->clean_index_ring_size[(entry_ptr)->ring] +             \
         (cache_ptr)->dirty_index_ring_size[(entry_ptr)->ring]) ) ) {        \
     HDassert(FALSE);                                                        \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL,                                \
-                "Post HT update for entry dirty SC failed")                 \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Post HT update for entry dirty SC failed") \
 }
 
 #else /* H5C_DO_SANITY_CHECKS */
@@ -1601,8 +1590,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
               (cache_ptr)->slist_size );                                       \
                                                                                \
     if(H5SL_insert((cache_ptr)->slist_ptr, entry_ptr, &(entry_ptr)->addr) < 0) \
-        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, (fail_val),                       \
-                    "Can't insert entry in skip list")                         \
+        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, (fail_val), "can't insert entry in skip list") \
                                                                                \
     (entry_ptr)->in_slist = TRUE;                                              \
     (cache_ptr)->slist_changed = TRUE;                                         \
@@ -1637,8 +1625,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
               (cache_ptr)->slist_size );                                       \
                                                                                \
     if(H5SL_insert((cache_ptr)->slist_ptr, entry_ptr, &(entry_ptr)->addr) < 0) \
-        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, (fail_val),                       \
-                    "Can't insert entry in skip list")                         \
+        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, (fail_val), "can't insert entry in skip list") \
                                                                                \
     (entry_ptr)->in_slist = TRUE;                                              \
     (cache_ptr)->slist_changed = TRUE;                                         \
@@ -1690,8 +1677,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
                                                                             \
     if ( H5SL_remove((cache_ptr)->slist_ptr, &(entry_ptr)->addr)            \
              != (entry_ptr) )                                               \
-        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL,                          \
-                    "Can't delete entry from skip list.")                   \
+        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "can't delete entry from skip list") \
                                                                             \
     HDassert( (cache_ptr)->slist_len > 0 );                                 \
     if(!(during_flush))                                                     \
@@ -1728,8 +1714,7 @@ if ( ( (cache_ptr)->index_size !=                                           \
                                                                             \
     if ( H5SL_remove((cache_ptr)->slist_ptr, &(entry_ptr)->addr)            \
              != (entry_ptr) )                                               \
-        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL,                          \
-                    "Can't delete entry from skip list.")                   \
+        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "can't delete entry from skip list") \
                                                                             \
     HDassert( (cache_ptr)->slist_len > 0 );                                 \
     if(!(during_flush))                                                     \
@@ -2560,7 +2545,6 @@ if ( ( (cache_ptr)->index_size !=                                           \
                         (cache_ptr)->pel_tail_ptr, 			  \
 			(cache_ptr)->pel_len,                             \
                         (cache_ptr)->pel_size, (fail_val))                \
-        HDassert( (cache_ptr)->pel_len >= 0 );                            \
                                                                           \
     } else {                                                              \
                                                                           \
@@ -2966,41 +2950,40 @@ if ( ( (cache_ptr)->index_size !=                                           \
     H5C__DLL_REMOVE((entry_ptr), (cache_ptr)->pel_head_ptr,            \
                     (cache_ptr)->pel_tail_ptr, (cache_ptr)->pel_len,   \
                     (cache_ptr)->pel_size, (fail_val))                 \
-    HDassert( (cache_ptr)->pel_len >= 0 );                             \
                                                                        \
-        /* modified LRU specific code */                               \
+    /* modified LRU specific code */                                   \
                                                                        \
-        /* insert the entry at the head of the LRU list. */            \
+    /* insert the entry at the head of the LRU list. */                \
                                                                        \
-        H5C__DLL_PREPEND((entry_ptr), (cache_ptr)->LRU_head_ptr,       \
-                         (cache_ptr)->LRU_tail_ptr,                    \
-                         (cache_ptr)->LRU_list_len,                    \
-                         (cache_ptr)->LRU_list_size, (fail_val))       \
+    H5C__DLL_PREPEND((entry_ptr), (cache_ptr)->LRU_head_ptr,           \
+                     (cache_ptr)->LRU_tail_ptr,                        \
+                     (cache_ptr)->LRU_list_len,                        \
+                     (cache_ptr)->LRU_list_size, (fail_val))           \
                                                                        \
-        /* Similarly, insert the entry at the head of either the clean \
-         * or dirty LRU list as appropriate.                           \
-         */                                                            \
+    /* Similarly, insert the entry at the head of either the clean     \
+     * or dirty LRU list as appropriate.                               \
+     */                                                                \
                                                                        \
-        if ( (entry_ptr)->is_dirty ) {                                 \
+    if ( (entry_ptr)->is_dirty ) {                                     \
                                                                        \
-            H5C__AUX_DLL_PREPEND((entry_ptr),                          \
-			          (cache_ptr)->dLRU_head_ptr,          \
-                                  (cache_ptr)->dLRU_tail_ptr,          \
-                                  (cache_ptr)->dLRU_list_len,          \
-                                  (cache_ptr)->dLRU_list_size,         \
-			          (fail_val))                          \
+        H5C__AUX_DLL_PREPEND((entry_ptr),                              \
+                              (cache_ptr)->dLRU_head_ptr,              \
+                              (cache_ptr)->dLRU_tail_ptr,              \
+                              (cache_ptr)->dLRU_list_len,              \
+                              (cache_ptr)->dLRU_list_size,             \
+                              (fail_val))                              \
                                                                        \
-        } else {                                                       \
+    } else {                                                           \
                                                                        \
-            H5C__AUX_DLL_PREPEND((entry_ptr),                          \
-			          (cache_ptr)->cLRU_head_ptr,          \
-                                  (cache_ptr)->cLRU_tail_ptr,          \
-                                  (cache_ptr)->cLRU_list_len,          \
-                                  (cache_ptr)->cLRU_list_size,         \
-			          (fail_val))                          \
-         }                                                             \
+        H5C__AUX_DLL_PREPEND((entry_ptr),                              \
+                              (cache_ptr)->cLRU_head_ptr,              \
+                              (cache_ptr)->cLRU_tail_ptr,              \
+                              (cache_ptr)->cLRU_list_len,              \
+                              (cache_ptr)->cLRU_list_size,             \
+                              (fail_val))                              \
+     }                                                                 \
                                                                        \
-        /* End modified LRU specific code. */                          \
+    /* End modified LRU specific code. */                              \
                                                                        \
 } /* H5C__UPDATE_RP_FOR_UNPIN */
 
@@ -3195,22 +3178,22 @@ if ( ( (hd_ptr) == NULL ) ||                                                   \
      ( (len) <= 0 ) ||                                                         \
      ( (Size) < (entry_ptr)->size ) ||                                         \
      ( ( (Size) == (entry_ptr)->size ) && ( ! ( (len) == 1 ) ) ) ||            \
-     ( ( (entry_ptr)->coll_prev == NULL ) && ( (hd_ptr) != (entry_ptr) ) ) ||   \
+     ( ( (entry_ptr)->coll_prev == NULL ) && ( (hd_ptr) != (entry_ptr) ) ) ||  \
      ( ( (entry_ptr)->coll_next == NULL ) && ( (tail_ptr) != (entry_ptr) ) ) || \
      ( ( (len) == 1 ) &&                                                       \
        ( ! ( ( (hd_ptr) == (entry_ptr) ) && ( (tail_ptr) == (entry_ptr) ) &&   \
-             ( (entry_ptr)->coll_next == NULL ) &&                              \
-             ( (entry_ptr)->coll_prev == NULL ) &&                              \
+             ( (entry_ptr)->coll_next == NULL ) &&                             \
+             ( (entry_ptr)->coll_prev == NULL ) &&                             \
              ( (Size) == (entry_ptr)->size )                                   \
            )                                                                   \
        )                                                                       \
      )                                                                         \
    ) {                                                                         \
-    HDassert(0 && "coll DLL pre remove SC failed");                       \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "coll DLL pre remove SC failed")   \
+    HDassert(0 && "coll DLL pre remove SC failed");                            \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "coll DLL pre remove SC failed")  \
 }
 
-#define H5C__COLL_DLL_SC(head_ptr, tail_ptr, len, Size, fv)                  \
+#define H5C__COLL_DLL_SC(head_ptr, tail_ptr, len, Size, fv)                 \
 if ( ( ( ( (head_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&              \
        ( (head_ptr) != (tail_ptr) )                                         \
      ) ||                                                                   \
@@ -3222,36 +3205,35 @@ if ( ( ( ( (head_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&              \
        )                                                                    \
      ) ||                                                                   \
      ( ( (len) >= 1 ) &&                                                    \
-       ( ( (head_ptr) == NULL ) || ( (head_ptr)->coll_prev != NULL ) ||      \
-         ( (tail_ptr) == NULL ) || ( (tail_ptr)->coll_next != NULL )         \
+       ( ( (head_ptr) == NULL ) || ( (head_ptr)->coll_prev != NULL ) ||     \
+         ( (tail_ptr) == NULL ) || ( (tail_ptr)->coll_next != NULL )        \
        )                                                                    \
      )                                                                      \
    ) {                                                                      \
-    HDassert(0 && "COLL DLL sanity check failed");                      \
+    HDassert(0 && "COLL DLL sanity check failed");                          \
     HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "COLL DLL sanity check failed") \
 }
 
 #define H5C__COLL_DLL_PRE_INSERT_SC(entry_ptr, hd_ptr, tail_ptr, len, Size, fv) \
 if ( ( (entry_ptr) == NULL ) ||                                                \
-     ( (entry_ptr)->coll_next != NULL ) ||                                      \
-     ( (entry_ptr)->coll_prev != NULL ) ||                                      \
+     ( (entry_ptr)->coll_next != NULL ) ||                                     \
+     ( (entry_ptr)->coll_prev != NULL ) ||                                     \
      ( ( ( (hd_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&                   \
        ( (hd_ptr) != (tail_ptr) )                                              \
      ) ||                                                                      \
-     ( (len) < 0 ) ||                                                          \
      ( ( (len) == 1 ) &&                                                       \
        ( ( (hd_ptr) != (tail_ptr) ) || ( (Size) <= 0 ) ||                      \
          ( (hd_ptr) == NULL ) || ( (hd_ptr)->size != (Size) )                  \
        )                                                                       \
      ) ||                                                                      \
      ( ( (len) >= 1 ) &&                                                       \
-       ( ( (hd_ptr) == NULL ) || ( (hd_ptr)->coll_prev != NULL ) ||             \
-         ( (tail_ptr) == NULL ) || ( (tail_ptr)->coll_next != NULL )            \
+       ( ( (hd_ptr) == NULL ) || ( (hd_ptr)->coll_prev != NULL ) ||            \
+         ( (tail_ptr) == NULL ) || ( (tail_ptr)->coll_next != NULL )           \
        )                                                                       \
      )                                                                         \
    ) {                                                                         \
-    HDassert(0 && "COLL DLL pre insert SC failed");                     \
-    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "COLL DLL pre insert SC failed")   \
+    HDassert(0 && "COLL DLL pre insert SC failed");                            \
+    HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (fv), "COLL DLL pre insert SC failed")  \
 }
 
 #else /* H5C_DO_SANITY_CHECKS */
@@ -4311,7 +4293,7 @@ typedef struct H5C_tag_info_t {
  * This is handled by the H5MF_settle_raw_data_fsm() and
  * H5MF_settle_meta_data_FSM() routines.  As these calls are expensive,
  * the following fields are used to track whether the target free space
- * managers are clean.  
+ * managers are clean.
  *
  * They are also used in sanity checking, as once a free space manager is
  * settled, it should not become unsettled (i.e. be asked to allocate or
@@ -4328,7 +4310,7 @@ typedef struct H5C_tag_info_t {
  *		free space manager metadata.
  *
  * mdfsm_settled:  Boolean flag indicating whether the meta data free space
- *              manager is settled -- i.e. whether the correct space has 
+ *              manager is settled -- i.e. whether the correct space has
  *              been allocated for it in the file.
  *
  *              Note that the name of this field is deceptive.  In the 
diff --git a/src/H5Cprivate.h b/src/H5Cprivate.h
index 47573f9..30a7745 100644
--- a/src/H5Cprivate.h
+++ b/src/H5Cprivate.h
@@ -1661,8 +1661,8 @@ typedef struct H5C_cache_entry_t {
  *						JRM - 8/5/15
  *
  * magic:	Unsigned 32 bit integer that must always be set to
- *              H5C__H5C_IMAGE_ENTRY_T_MAGIC when the entry is valid.
- *              The field must be set to H5C__H5C_IMAGE__ENTRY_T_BAD_MAGIC
+ *              H5C__IMAGE_ENTRY_T_MAGIC when the entry is valid.
+ *              The field must be set to H5C__IMAGE__ENTRY_T_BAD_MAGIC
  *              just before the entry is freed.
  *
  * addr:	Base address of the cache entry on disk.
@@ -2279,12 +2279,12 @@ H5_DLL herr_t H5C_cache_image_status(H5F_t * f, hbool_t *load_ci_ptr,
 
 #ifdef H5_HAVE_PARALLEL
 H5_DLL herr_t H5C_apply_candidate_list(H5F_t *f, hid_t dxpl_id,
-    H5C_t *cache_ptr, int num_candidates, haddr_t *candidates_list_ptr,
+    H5C_t *cache_ptr, unsigned num_candidates, haddr_t *candidates_list_ptr,
     int mpi_rank, int mpi_size);
 H5_DLL herr_t H5C_construct_candidate_list__clean_cache(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_construct_candidate_list__min_clean(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_clear_coll_entries(H5C_t * cache_ptr, hbool_t partial);
-H5_DLL herr_t H5C_mark_entries_as_clean(H5F_t *f, hid_t dxpl_id, int32_t ce_array_len,
+H5_DLL herr_t H5C_mark_entries_as_clean(H5F_t *f, hid_t dxpl_id, unsigned ce_array_len,
     haddr_t *ce_array_ptr);
 #endif /* H5_HAVE_PARALLEL */
 
diff --git a/test/cache.c b/test/cache.c
index d09a122..1cfc0b1 100644
--- a/test/cache.c
+++ b/test/cache.c
@@ -13697,7 +13697,7 @@ check_move_entry(void)
 {
     unsigned          u;
     H5F_t *      file_ptr = NULL;
-    struct move_entry_test_spec test_specs[8] =
+    struct move_entry_test_spec test_specs[4] =
     {
       {
         /* int     entry_type      = */ PICO_ENTRY_TYPE,
@@ -16779,7 +16779,6 @@ check_expunge_entry_errs(void)
  *
  *-------------------------------------------------------------------------
  */
-
 static unsigned
 check_move_entry_errs(void)
 {
@@ -16801,7 +16800,6 @@ check_move_entry_errs(void)
      */
 
     if(pass) {
-
         reset_entries();
 
         file_ptr = setup_cache((size_t)(2 * 1024), (size_t)(1 * 1024));
@@ -16814,36 +16812,29 @@ check_move_entry_errs(void)
         entry_0_0_ptr = &((entries[0])[0]);
         entry_0_1_ptr = &((entries[0])[1]);
         entry_1_0_ptr = &((entries[1])[0]);
-    }
+    } /* end if */
 
     if(pass) {
-
-        result = H5C_move_entry(cache_ptr, types[0],
-                                  entry_0_0_ptr->addr, entry_0_1_ptr->addr);
+        result = H5C_move_entry(cache_ptr, types[0], entry_0_0_ptr->addr, entry_0_1_ptr->addr);
 
         if(result >= 0) {
-
             pass = FALSE;
             failure_mssg = "move to addr of same type succeeded.\n";
-        }
-    }
+        } /* end if */
+    } /* end if */
 
     if(pass) {
-
-        result = H5C_move_entry(cache_ptr, types[0],
-                                  entry_0_0_ptr->addr, entry_1_0_ptr->addr);
+        result = H5C_move_entry(cache_ptr, types[0], entry_0_0_ptr->addr, entry_1_0_ptr->addr);
 
         if(result >= 0) {
-
             pass = FALSE;
             failure_mssg = "move to addr of different type succeeded.\n";
-        }
-    }
+        } /* end if */
+    } /* end if */
 
     if(pass)
         takedown_cache(file_ptr, FALSE, FALSE);
 
-
     /* Allocate a cache, protect an entry R/O, and then call
      * H5C_move_entry() to move it -- this should fail.
      *
@@ -16852,7 +16843,6 @@ check_move_entry_errs(void)
      */
 
     if(pass) {
-
         reset_entries();
 
         file_ptr = setup_cache((size_t)(2 * 1024), (size_t)(1 * 1024));
@@ -16860,29 +16850,21 @@ check_move_entry_errs(void)
         cache_ptr = file_ptr->shared->cache;
 
         insert_entry(file_ptr, 0, 0, H5C__NO_FLAGS_SET);
-
         protect_entry_ro(file_ptr, 0, 0);
 
         entry_ptr = &((entries[0])[0]);
-
-    }
+    } /* end if */
 
     if(pass) {
-
 	result = H5C_move_entry(cache_ptr, types[0], entry_ptr->header.addr, entry_ptr->header.addr + 10);
 
         if(result >= 0) {
-
             pass = FALSE;
-            failure_mssg =
-                "Call to H5C_move_entry on a R/O protected entry succeeded.\n";
-
-        } else {
-
+            failure_mssg = "Call to H5C_move_entry on a R/O protected entry succeeded.\n";
+        } /* end if */
+        else
             unprotect_entry(file_ptr, 0, 0, H5C__NO_FLAGS_SET);
-
-	}
-    }
+    } /* end if */
 
     if(pass)
         takedown_cache(file_ptr, FALSE, FALSE);
@@ -16892,8 +16874,7 @@ check_move_entry_errs(void)
     else {
         H5_FAILED()
 
-        HDfprintf(stdout, "%s: failure_mssg = \"%s\".\n",
-                  FUNC, failure_mssg);
+        HDfprintf(stdout, "%s: failure_mssg = \"%s\".\n", FUNC, failure_mssg);
     } /* end else */
 
     return (unsigned)!pass;
diff --git a/test/cache_api.c b/test/cache_api.c
index a0d6e83..710e38f 100644
--- a/test/cache_api.c
+++ b/test/cache_api.c
@@ -2314,19 +2314,12 @@ main(void)
         nerrs += 1;
     }
 
-    if ( invalid_configs ) {
-
+    if(invalid_configs)
         HDfree(invalid_configs);
-    }
-
-    if ( nerrs > 0 ) {
 
+    if(nerrs > 0)
         return EXIT_FAILURE;
-
-    } else {
-
+    else
         return EXIT_SUCCESS;
-    }
-
 } /* main() */
 
diff --git a/test/cache_common.c b/test/cache_common.c
index bb526c1..81e62ae 100644
--- a/test/cache_common.c
+++ b/test/cache_common.c
@@ -6438,7 +6438,7 @@ dump_LRU(H5F_t * file_ptr)
     entry_ptr = cache_ptr->LRU_head_ptr;
 
     HDfprintf(stdout, 
-              "\n\nIndex len/size/clean size/dirty size = %d/%lld/%lld/%lld\n",
+              "\n\nIndex len/size/clean size/dirty size = %u/%lld/%lld/%lld\n",
               cache_ptr->index_len, (long long)(cache_ptr->index_size),
               (long long)(cache_ptr->clean_index_size),
               (long long)(cache_ptr->dirty_index_size));
diff --git a/test/links.c b/test/links.c
index d5a3b83..cba659e 100644
--- a/test/links.c
+++ b/test/links.c
@@ -24,15 +24,19 @@
  * This file needs to access private information from the H5G package.
  * This file also needs to access the group testing code.
  */
-#define H5G_FRIEND		/*suppress error about including H5Gpkg	  */
-#define H5G_TESTING
-
 #define H5FD_FRIEND		/*suppress error about including H5FDpkg	  */
 #define H5FD_TESTING
 
+/*
+ * This file needs to access private information from the H5G package.
+ * This file also needs to access the group testing code.
+ */
+#define H5G_FRIEND		/*suppress error about including H5Gpkg	  */
+#define H5G_TESTING
+
 #include "h5test.h"
 #include "H5srcdir.h"
-#include "H5FDpkg.h"            /* File drivers         */
+#include "H5FDpkg.h"            /* File drivers                         */
 #include "H5Gpkg.h"		/* Groups 				*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5Lprivate.h"         /* Links                                */
diff --git a/testpar/t_cache.c b/testpar/t_cache.c
index 039b3ab..568c28f 100644
--- a/testpar/t_cache.c
+++ b/testpar/t_cache.c
@@ -333,7 +333,7 @@ struct mssg_t
     haddr_t	base_addr;
     unsigned	len;
     int		ver;
-    int		count;
+    unsigned	count;
     unsigned	magic;
 };
 
@@ -485,8 +485,8 @@ static hbool_t take_down_cache(hid_t fid, H5C_t * cache_ptr);
 static hbool_t verify_entry_reads(haddr_t addr, int expected_entry_reads);
 static hbool_t verify_entry_writes(haddr_t addr, int expected_entry_writes);
 static hbool_t verify_total_reads(int expected_total_reads);
-static hbool_t verify_total_writes(int expected_total_writes);
-static void verify_writes(int num_writes, haddr_t * written_entries_tbl);
+static hbool_t verify_total_writes(unsigned expected_total_writes);
+static void verify_writes(unsigned num_writes, haddr_t * written_entries_tbl);
 static void unlock_entry(H5F_t * file_ptr, int32_t type, unsigned int flags);
 static void unpin_entry(H5F_t * file_ptr, int32_t idx, hbool_t global,
                  hbool_t dirty, hbool_t via_unprotect);
@@ -1214,7 +1214,7 @@ setup_derived_types(void)
     int result;
     MPI_Datatype mpi_types[9] = {MPI_INT, MPI_INT, MPI_INT, MPI_LONG,
                                  HADDR_AS_MPI_TYPE, MPI_INT, MPI_INT,
-                                 MPI_INT, MPI_UNSIGNED};
+                                 MPI_UNSIGNED, MPI_UNSIGNED};
     int block_len[9] = {1, 1, 1, 1, 1, 1, 1, 1, 1};
     MPI_Aint displs[9];
     struct mssg_t sample; /* used to compute displacements */
@@ -4334,15 +4334,15 @@ setup_cache_for_test(hid_t * fid_ptr,
  *
  *****************************************************************************/
 static void
-verify_writes(int num_writes,
+verify_writes(unsigned num_writes,
 	      haddr_t * written_entries_tbl)
 {
     const hbool_t report = FALSE;
     hbool_t proceed = TRUE;
     int i = 0;
+    unsigned u;
 
     HDassert( world_mpi_rank != world_server_mpi_rank );
-    HDassert( num_writes >= 0 );
     HDassert( ( num_writes == 0 ) ||
               ( written_entries_tbl != NULL ) );
 
@@ -4367,10 +4367,10 @@ verify_writes(int num_writes,
         proceed = verify_total_writes(num_writes);
     }
 
-    while ( ( proceed ) && ( i < num_writes ) ) 
+    while ( ( proceed ) && ( u < num_writes ) ) 
     {
-        proceed = verify_entry_writes(written_entries_tbl[i], 1);
-        i++;
+        proceed = verify_entry_writes(written_entries_tbl[u], 1);
+        u++;
     }
 
     /* barrier to ensure that all other processes have finished verifying
@@ -4399,12 +4399,12 @@ verify_writes(int num_writes,
 
         if ( proceed ) {
 
-            HDfprintf(stdout, "%d:%s: verified %d writes.\n",
+            HDfprintf(stdout, "%d:%s: verified %u writes.\n",
                       world_mpi_rank, FUNC, num_writes);
 
         } else {
 
-            HDfprintf(stdout, "%d:%s: FAILED to verify %d writes.\n",
+            HDfprintf(stdout, "%d:%s: FAILED to verify %u writes.\n",
                       world_mpi_rank, FUNC, num_writes);
 
         }
@@ -4929,10 +4929,10 @@ verify_total_reads(int expected_total_reads)
  *
  *****************************************************************************/
 static hbool_t
-verify_total_writes(int expected_total_writes)
+verify_total_writes(unsigned expected_total_writes)
 {
     hbool_t success = TRUE; /* will set to FALSE if appropriate. */
-    long reported_total_writes;
+    unsigned reported_total_writes;
     struct mssg_t mssg;
 
     if ( success ) {
@@ -4997,7 +4997,7 @@ verify_total_writes(int expected_total_writes)
             success = FALSE;
             if ( verbose ) {
                 HDfprintf(stdout, 
-                   "%d:%s: reported/expected total writes mismatch (%ld/%ld).\n",
+                   "%d:%s: reported/expected total writes mismatch (%u/%u).\n",
                    world_mpi_rank, FUNC, 
                    reported_total_writes, expected_total_writes);
             }
@@ -5319,7 +5319,7 @@ server_smoke_check(void)
 
         if ( success ) {
 
-            success = verify_total_writes(world_mpi_size - 1);
+            success = verify_total_writes((unsigned)(world_mpi_size - 1));
         }
 
         if ( success ) {
@@ -5423,7 +5423,7 @@ server_smoke_check(void)
 
         if ( success ) {
 
-            success = verify_total_writes(world_mpi_size - 1);
+            success = verify_total_writes((unsigned)(world_mpi_size - 1));
         }
 
         if ( success ) {