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Subject[PATCH] Remove unneeded lock_kernel() in drivers/block/loop.c

This patch remove the unneeded lock_kernel() in drivers/block/loop.c. I
read the code as this lock_kernel() doesn't protect anything. Loopback
code use lo_ctl_mutex for syncronization.

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 0ed5470..1cc004e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1286,7 +1286,6 @@ static long lo_compat_ioctl(struct file *file, unsigned int cmd, unsigned long a
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);
@@ -1312,7 +1311,6 @@ static long lo_compat_ioctl(struct file *file, unsigned int cmd, unsigned long a
err = -ENOIOCTLCMD;
break;
}
- unlock_kernel();
return err;
}
#endif

--

--------------
Diego Woitasen
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