diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-07-15 23:12:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-15 23:12:58 +0200 |
| commit | 1e09481365ce248dbb4eb06dad70129bb5807037 (patch) | |
| tree | c0cff5bef95c8b5e7486f144718ade9a06c284dc /drivers/char/genrtc.c | |
| parent | 3e2f69fdd1b00166e7d589bce56b2d36a9e74374 (diff) | |
| parent | b9d2252c1e44fa83a4e65fdc9eb93db6297c55af (diff) | |
Merge branch 'linus' into core/softlockup
Conflicts:
kernel/softlockup.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char/genrtc.c')
| -rw-r--r-- | drivers/char/genrtc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c index 69f0a2993af..aac0985a572 100644 --- a/drivers/char/genrtc.c +++ b/drivers/char/genrtc.c @@ -51,6 +51,7 @@ #include <linux/init.h> #include <linux/poll.h> #include <linux/proc_fs.h> +#include <linux/smp_lock.h> #include <linux/workqueue.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) { - if (gen_rtc_status & RTC_IS_OPEN) + lock_kernel(); + if (gen_rtc_status & RTC_IS_OPEN) { + unlock_kernel(); return -EBUSY; + } gen_rtc_status |= RTC_IS_OPEN; gen_rtc_irq_data = 0; irq_active = 0; + unlock_kernel(); return 0; } |