Btrfs: use find_or_create_page instead of grab_cache_page
grab_cache_page will use mapping_gfp_mask(), which for all inodes is set to
GFP_HIGHUSER_MOVABLE. So instead use find_or_create_page in all cases where we
need GFP_NOFS so we don't deadlock. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a3c4751..09c9a8d 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -867,8 +867,8 @@
/* step one, lock all the pages */
for (i = 0; i < num_pages; i++) {
struct page *page;
- page = grab_cache_page(inode->i_mapping,
- start_index + i);
+ page = find_or_create_page(inode->i_mapping,
+ start_index + i, GFP_NOFS);
if (!page)
break;