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genrtc: BKL pushdown

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
2008-05-20 19:15:55 +02:00
committed by Jonathan Corbet
parent 78abb6ac91
commit 742a2fe31b
1 changed files with 6 additions and 1 deletions
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7
drivers/char/genrtc.c
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@@ -51,6 +51,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/poll.h> #include <linux/poll.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/smp_lock.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
@@ -338,12 +339,16 @@ static int gen_rtc_ioctl(struct inode *inode, struct file *file,
static int gen_rtc_open(struct inode *inode, struct file *file) static int gen_rtc_open(struct inode *inode, struct file *file)
{ {
if (gen_rtc_status & RTC_IS_OPEN) lock_kernel();
if (gen_rtc_status & RTC_IS_OPEN) {
unlock_kernel();
return -EBUSY; return -EBUSY;
}
gen_rtc_status |= RTC_IS_OPEN; gen_rtc_status |= RTC_IS_OPEN;
gen_rtc_irq_data = 0; gen_rtc_irq_data = 0;
irq_active = 0; irq_active = 0;
unlock_kernel();
return 0; return 0;
} }