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| author |   Ingo Molnar <mingo@elte.hu> | 2008-07-18 22:50:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 22:50:34 +0200 |
| commit | a208f37a465e222218974ab20a31b42b7b4893b2 (patch) | |
| tree | 77c6acdd4be32024330a14f2618b814126ce7a20 /drivers/char/rtc.c | |
| parent | x86: apic_ops for lguest (diff) | |
| parent | Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 (diff) | |
| download | linux-dev-a208f37a465e222218974ab20a31b42b7b4893b2.tar.xz linux-dev-a208f37a465e222218974ab20a31b42b7b4893b2.zip | |
Merge branch 'linus' into x86/x2apic
Diffstat (limited to 'drivers/char/rtc.c')
| -rw-r--r-- | drivers/char/rtc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 909cac93fa2a..fa92a8af5a5a 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -73,6 +73,7 @@ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/spinlock.h> +#include <linux/smp_lock.h> #include <linux/sysctl.h> #include <linux/wait.h> #include <linux/bcd.h> @@ -734,6 +735,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, * needed here. Or anywhere else in this driver. */ static int rtc_open(struct inode *inode, struct file *file) { + lock_kernel(); spin_lock_irq(&rtc_lock); if (rtc_status & RTC_IS_OPEN) @@ -743,10 +745,12 @@ static int rtc_open(struct inode *inode, struct file *file) rtc_irq_data = 0; spin_unlock_irq(&rtc_lock); + unlock_kernel(); return 0; out_busy: spin_unlock_irq(&rtc_lock); + unlock_kernel(); return -EBUSY; } |