luck/tmp_suning_uos_patched
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raw: BKL pushdown

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Put explicit lock_kernel() calls into raw_open(), even though the existing
locking looks adequate.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-16 13:54:46 -06:00
parent b8c71d7ae2
commit c0bed680f0
1 changed files with 3 additions and 0 deletions
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3
drivers/char/raw.c
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@ -19,6 +19,7 @@
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@ -53,6 +54,7 @@ static int raw_open(struct inode *inode, struct file *filp)
return 0;
}
lock_kernel();
mutex_lock(&raw_mutex);
/*
@ -79,6 +81,7 @@ static int raw_open(struct inode *inode, struct file *filp)
bdev->bd_inode->i_mapping;
filp->private_data = bdev;
mutex_unlock(&raw_mutex);
unlock_kernel();
return 0;
out2: