From: Diego Woitasen <diego@woitasen.com.ar>

Signed-off-by: Diego Woitasen <diego@woitasen.com.ar>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/block/loop.c |    2 --
 1 files changed, 2 deletions(-)

diff -puN drivers/block/loop.c~remove-unneded-lock_kernel-in-driver-block-loopc drivers/block/loop.c
--- a/drivers/block/loop.c~remove-unneded-lock_kernel-in-driver-block-loopc
+++ a/drivers/block/loop.c
@@ -1285,7 +1285,6 @@ static long lo_compat_ioctl(struct file 
 	struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
 	int err;
 
-	lock_kernel();
 	switch(cmd) {
 	case LOOP_SET_STATUS:
 		mutex_lock(&lo->lo_ctl_mutex);
@@ -1311,7 +1310,6 @@ static long lo_compat_ioctl(struct file 
 		err = -ENOIOCTLCMD;
 		break;
 	}
-	unlock_kernel();
 	return err;
 }
 #endif
_