[PATCH] xfs: Use kmem_zalloc for bp->b_pages.

Sean Fu
2019-03-09T15:36:45Z

Change the allocation of bp->b_pages to use kmem_zalloc instead of
kmem_alloc.
Remove unnecessary memset for bp->b_pages.

This reduces text size by 42 bytes.
Before:
text data bss dec hex filename
23335 588 8 23931 5d7b ./fs/xfs/xfs_buf.o
After:
text data bss dec hex filename
23293 588 8 23889 5d51 ./fs/xfs/xfs_buf.o

Signed-off-by: Sean Fu <fxinrong@gmail.com>
---
fs/xfs/xfs_buf.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 4f5f2ff3f70f..be4f740b97c1 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -289,12 +289,11 @@ _xfs_buf_get_pages(
if (page_count <= XB_PAGES) {
bp->b_pages = bp->b_page_array;
} else {
- bp->b_pages = kmem_alloc(sizeof(struct page *) *
+ bp->b_pages = kmem_zalloc(sizeof(struct page *) *
page_count, KM_NOFS);
if (bp->b_pages == NULL)
return -ENOMEM;
}
- memset(bp->b_pages, 0, sizeof(struct page *) * page_count);
}
return 0;
}
--
2.16.4