Update types in smgr API

Change data buffer to void *, from char *, and add const where
appropriate.  This makes it match the File API (see also
2d4f1ba6cfc2f0a977f1c30bda9848041343e248) and stdio.

Discussion: https://www.postgresql.org/message-id/flat/11dda853-bb5b-59ba-a746-e168b1ce4bdb%40enterprisedb.com

4 files changed, 9 insertions, 9 deletions

diff --git a/src/backend/access/heap/rewriteheap.c b/src/backend/access/heap/rewriteheap.c
index 8993c1ed5a9..ae0282a70ee 100644
--- a/src/backend/access/heap/rewriteheap.c
+++ b/src/backend/access/heap/rewriteheap.c
@@ -326,7 +326,7 @@ end_heap_rewrite(RewriteState state)
 		PageSetChecksumInplace(state->rs_buffer, state->rs_blockno);
 
 		smgrextend(RelationGetSmgr(state->rs_new_rel), MAIN_FORKNUM,
-				   state->rs_blockno, (char *) state->rs_buffer, true);
+				   state->rs_blockno, state->rs_buffer, true);
 	}
 
 	/*
@@ -692,7 +692,7 @@ raw_heap_insert(RewriteState state, HeapTuple tup)
 			PageSetChecksumInplace(page, state->rs_blockno);
 
 			smgrextend(RelationGetSmgr(state->rs_new_rel), MAIN_FORKNUM,
-					   state->rs_blockno, (char *) page, true);
+					   state->rs_blockno, page, true);
 
 			state->rs_blockno++;
 			state->rs_buffer_valid = false;
diff --git a/src/backend/access/nbtree/nbtree.c b/src/backend/access/nbtree/nbtree.c
index 1cc88da032d..3f7b541e9d2 100644
--- a/src/backend/access/nbtree/nbtree.c
+++ b/src/backend/access/nbtree/nbtree.c
@@ -165,7 +165,7 @@ btbuildempty(Relation index)
 	 */
 	PageSetChecksumInplace(metapage, BTREE_METAPAGE);
 	smgrwrite(RelationGetSmgr(index), INIT_FORKNUM, BTREE_METAPAGE,
-			  (char *) metapage, true);
+			  metapage, true);
 	log_newpage(&RelationGetSmgr(index)->smgr_rlocator.locator, INIT_FORKNUM,
 				BTREE_METAPAGE, metapage, true);
 
diff --git a/src/backend/access/nbtree/nbtsort.c b/src/backend/access/nbtree/nbtsort.c
index 67b7b1710c6..02b9601bece 100644
--- a/src/backend/access/nbtree/nbtsort.c
+++ b/src/backend/access/nbtree/nbtsort.c
@@ -664,7 +664,7 @@ _bt_blwritepage(BTWriteState *wstate, Page page, BlockNumber blkno)
 		/* don't set checksum for all-zero page */
 		smgrextend(RelationGetSmgr(wstate->index), MAIN_FORKNUM,
 				   wstate->btws_pages_written++,
-				   (char *) wstate->btws_zeropage,
+				   wstate->btws_zeropage,
 				   true);
 	}
 
@@ -678,14 +678,14 @@ _bt_blwritepage(BTWriteState *wstate, Page page, BlockNumber blkno)
 	{
 		/* extending the file... */
 		smgrextend(RelationGetSmgr(wstate->index), MAIN_FORKNUM, blkno,
-				   (char *) page, true);
+				   page, true);
 		wstate->btws_pages_written++;
 	}
 	else
 	{
 		/* overwriting a block we zero-filled before */
 		smgrwrite(RelationGetSmgr(wstate->index), MAIN_FORKNUM, blkno,
-				  (char *) page, true);
+				  page, true);
 	}
 
 	pfree(page);
diff --git a/src/backend/access/spgist/spginsert.c b/src/backend/access/spgist/spginsert.c
index 4ed067f0d93..718a88335d0 100644
--- a/src/backend/access/spgist/spginsert.c
+++ b/src/backend/access/spgist/spginsert.c
@@ -170,7 +170,7 @@ spgbuildempty(Relation index)
 	 */
 	PageSetChecksumInplace(page, SPGIST_METAPAGE_BLKNO);
 	smgrwrite(RelationGetSmgr(index), INIT_FORKNUM, SPGIST_METAPAGE_BLKNO,
-			  (char *) page, true);
+			  page, true);
 	log_newpage(&(RelationGetSmgr(index))->smgr_rlocator.locator, INIT_FORKNUM,
 				SPGIST_METAPAGE_BLKNO, page, true);
 
@@ -179,7 +179,7 @@ spgbuildempty(Relation index)
 
 	PageSetChecksumInplace(page, SPGIST_ROOT_BLKNO);
 	smgrwrite(RelationGetSmgr(index), INIT_FORKNUM, SPGIST_ROOT_BLKNO,
-			  (char *) page, true);
+			  page, true);
 	log_newpage(&(RelationGetSmgr(index))->smgr_rlocator.locator, INIT_FORKNUM,
 				SPGIST_ROOT_BLKNO, page, true);
 
@@ -188,7 +188,7 @@ spgbuildempty(Relation index)
 
 	PageSetChecksumInplace(page, SPGIST_NULL_BLKNO);
 	smgrwrite(RelationGetSmgr(index), INIT_FORKNUM, SPGIST_NULL_BLKNO,
-			  (char *) page, true);
+			  page, true);
 	log_newpage(&(RelationGetSmgr(index))->smgr_rlocator.locator, INIT_FORKNUM,
 				SPGIST_NULL_BLKNO, page, true);