Btrfs: Add a per-inode csum mutex to avoid races creating csum items

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index ece221cba90c..8037792f8789 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -267,13 +267,13 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
 
         /* FIXME...EIEIO, ENOSPC and more */
         /* insert any holes we need to create */
-        if (isize < end_pos) {
+        if (isize < start_pos) {
                 u64 last_pos_in_file;
                 u64 hole_size;
                 u64 mask = root->sectorsize - 1;
                 last_pos_in_file = (isize + mask) & ~mask;
-                hole_size = (end_pos - last_pos_in_file + mask) & ~mask;
-                if (last_pos_in_file < end_pos) {
+                hole_size = (start_pos - last_pos_in_file + mask) & ~mask;
+                if (last_pos_in_file < start_pos) {
                         err = btrfs_drop_extents(trans, root, inode,
                                                  last_pos_in_file,
                                                  last_pos_in_file + hole_size,