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rtc-rtc-m41t80: BKL pushdown

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2008-05-20 19:16:39 +02:00 committed by Jonathan Corbet
parent 4333deee6b
commit 4101273535
1 changed files with 6 additions and 1 deletions
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7
drivers/rtc/rtc-m41t80.c
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@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/i2c.h>
#include <linux/rtc.h>
@ -655,12 +656,16 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
static int wdt_open(struct inode *inode, struct file *file)
{
if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) {
if (test_and_set_bit(0, &wdt_is_open))
lock_kernel();
if (test_and_set_bit(0, &wdt_is_open)) {
unlock_kernel();
return -EBUSY;
}
/*
* Activate
*/
wdt_is_open = 1;
unlock_kernel();
return 0;
}
return -ENODEV;