md/bitmap:Don't use IS_ERR to judge alloc_page().

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 6 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index df73375c160a..7155945f8eb8 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -470,14 +470,10 @@ static int bitmap_new_disk_sb(struct bitmap *bitmap)
 {
         bitmap_super_t *sb;
         unsigned long chunksize, daemon_sleep, write_behind;
-        int err = -EINVAL;
 
         bitmap->storage.sb_page = alloc_page(GFP_KERNEL);
-        if (IS_ERR(bitmap->storage.sb_page)) {
-                err = PTR_ERR(bitmap->storage.sb_page);
-                bitmap->storage.sb_page = NULL;
-                return err;
-        }
+        if (bitmap->storage.sb_page == NULL)
+                return -ENOMEM;
         bitmap->storage.sb_page->index = 0;
 
         sb = kmap_atomic(bitmap->storage.sb_page);