[PATCH 3/8] fs: btrfs: remove unused hardirq.h

[Yang Shi]

Preempt counter APIs have been split out, currently, hardirq.h just
includes irq_enter/exit APIs which are not used by btrfs at all.

So, remove the unused hardirq.h.

Signed-off-by: Yang Shi <yang.s@xxxxxxxxxxxxxxx>
Cc: Chris Mason <clm@xxxxxx>
Cc: Josef Bacik <jbacik@xxxxxx>
Cc: David Sterba <dsterba@xxxxxxxx>
Cc: linux-btrfs@xxxxxxxxxxxxxxx
---
 fs/btrfs/extent_map.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 2e348fb..cced7f1 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -2,7 +2,6 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/hardirq.h>
 #include "ctree.h"
 #include "extent_map.h"
 #include "compression.h"
-- 
1.8.3.1