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

[Sean Fu]

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 <fxinr...@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