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| author | Arnd Bergmann <arnd@arndb.de> | 2008-05-20 19:16:03 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 22:05:57 +0200 |
| commit | b0e54f7c477ad24fa0d49baed942c5a5909c748b (patch) | |
| tree | cf69ed8d72b97079f68303ae9ed4bc686b6f31b3 /drivers/char | |
| parent | infiniband-ucma: BKL pushdown (diff) | |
| download | linux-b0e54f7c477ad24fa0d49baed942c5a5909c748b.tar.xz linux-b0e54f7c477ad24fa0d49baed942c5a5909c748b.zip | |
ip27-rtc: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/ip27-rtc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/ip27-rtc.c b/drivers/char/ip27-rtc.c index 86e6538a77b0..ec9d0443d92c 100644 --- a/drivers/char/ip27-rtc.c +++ b/drivers/char/ip27-rtc.c @@ -27,6 +27,7 @@ #include <linux/bcd.h> #include <linux/module.h> #include <linux/kernel.h> +#include <linux/smp_lock.h> #include <linux/types.h> #include <linux/miscdevice.h> #include <linux/ioport.h> @@ -163,15 +164,18 @@ static long rtc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) static int rtc_open(struct inode *inode, struct file *file) { + lock_kernel(); spin_lock_irq(&rtc_lock); if (rtc_status & RTC_IS_OPEN) { spin_unlock_irq(&rtc_lock); + unlock_kernel(); return -EBUSY; } rtc_status |= RTC_IS_OPEN; spin_unlock_irq(&rtc_lock); + unlock_kernel(); return 0; } |