fs/btrfs: use WARN

Use WARN rather than printk followed by WARN_ON(1), for conciseness.

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression list es;
@@

-printk(
+WARN(1,
  es);
-WARN_ON(1);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 064315990f8a..07a2162cdd65 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3397,14 +3397,12 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
         int was_dirty;
 
         btrfs_assert_tree_locked(buf);
-        if (transid != root->fs_info->generation) {
-                printk(KERN_CRIT "btrfs transid mismatch buffer %llu, "
+        if (transid != root->fs_info->generation)
+                WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, "
                        "found %llu running %llu\n",
                         (unsigned long long)buf->start,
                         (unsigned long long)transid,
                         (unsigned long long)root->fs_info->generation);
-                WARN_ON(1);
-        }
         was_dirty = set_extent_buffer_dirty(buf);
         if (!was_dirty) {
                 spin_lock(&root->fs_info->delalloc_lock);