Btrfs: Avoid using __GFP_HIGHMEM with slab allocator

btrfs_releasepage may call kmem_cache_alloc indirectly,
and provide same GFP flags it gets to kmem_cache_alloc.
So it's possible to use __GFP_HIGHMEM with the slab
allocator.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8f07062..638bcb5 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4263,7 +4263,7 @@ static int btrfs_releasepage(struct page *page, gfp_t gfp_flags)
 {
        if (PageWriteback(page) || PageDirty(page))
                return 0;
-       return __btrfs_releasepage(page, gfp_flags);
+       return __btrfs_releasepage(page, gfp_flags & GFP_NOFS);
 }
 
 static void btrfs_invalidatepage(struct page *page, unsigned long offset)