diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2008-05-20 19:15:55 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 14:05:57 -0600 |
| commit | 742a2fe31bf311d065a2bbacc2b363103b351300 (patch) | |
| tree | ecf719644106b4c47bdda2e7efa9c40e6b3710eb /drivers/char/genrtc.c | |
| parent | 78abb6ac919cee123e632d833a42d0312ccb2b0d (diff) | |
| download | linux-742a2fe31bf311d065a2bbacc2b363103b351300.tar.bz2 | |
genrtc: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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 69f0a2993af0..aac0985a572b 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; } |