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tlclk: remove big kernel lock 

This driver already has a global mutex, so let's just
use that in the open function instead of the BKL.
It may not even be needed there, but this patch should
have the smallest impact.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Gross <mark.gross@intel.com>
This commit is contained in:
Arnd Bergmann 2010-09-11 19:31:43 +02:00
parent c4a0472725
commit efbec1cd04
1 changed files with 3 additions and 3 deletions
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6
drivers/char/tlclk.c
View File

@ -37,7 +37,7 @@
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/sysfs.h>
#include <linux/device.h>
@ -206,7 +206,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
{
int result;
lock_kernel();
mutex_lock(&tlclk_mutex);
if (test_and_set_bit(0, &useflags)) {
result = -EBUSY;
/* this legacy device is always one per system and it doesn't
@ -229,7 +229,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
inb(TLCLK_REG6); /* Clear interrupt events */
out:
unlock_kernel();
mutex_unlock(&tlclk_mutex);
return result;
}