AcoSail/kernel_optimize_test
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rtc: cdev lock_kernel() pushdown

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Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-15 09:38:18 -06:00
parent 0bec0bba7a
commit 51a776fa7a
1 changed files with 9 additions and 3 deletions
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12
drivers/rtc/rtc-dev.c
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@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/smp_lock.h>
#include "rtc-core.h"
static dev_t rtc_devt;
@ -26,8 +27,11 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
struct rtc_device, char_dev);
const struct rtc_class_ops *ops = rtc->ops;
if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
return -EBUSY;
lock_kernel();
if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags)) {
err = -EBUSY;
goto out;
}
file->private_data = rtc;
@ -37,11 +41,13 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
rtc->irq_data = 0;
spin_unlock_irq(&rtc->irq_lock);
return 0;
goto out;
}
/* something has gone wrong */
clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
out:
unlock_kernel();
return err;
}