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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-18 21:13:20 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 21:13:20 +0200 |
| commit | f6dc8ccaab6d8f63cbae1e6c73fe972b26f5376c (patch) | |
| tree | c5643fcdc884a8d0bfc3f1bc28039cab7394e5bc /drivers/char/rtc.c | |
| parent | 323ec001c6bb98eeabb5abbdbb8c8055d9496554 (diff) | |
| parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
| download | kernel-crypto-f6dc8ccaab6d8f63cbae1e6c73fe972b26f5376c.tar.gz kernel-crypto-f6dc8ccaab6d8f63cbae1e6c73fe972b26f5376c.tar.xz kernel-crypto-f6dc8ccaab6d8f63cbae1e6c73fe972b26f5376c.zip | |
Merge branch 'linus' into core/generic-dma-coherent
Conflicts:
kernel/Makefile
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char/rtc.c')
| -rw-r--r-- | drivers/char/rtc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 5f80a9dff57..fa92a8af5a5 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> @@ -678,12 +679,13 @@ static int rtc_do_ioctl(unsigned int cmd, unsigned long arg, int kernel) if (arg != (1<<tmp)) return -EINVAL; + rtc_freq = arg; + spin_lock_irqsave(&rtc_lock, flags); if (hpet_set_periodic_freq(arg)) { spin_unlock_irqrestore(&rtc_lock, flags); return 0; } - rtc_freq = arg; val = CMOS_READ(RTC_FREQ_SELECT) & 0xf0; val |= (16 - tmp); @@ -733,6 +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) @@ -742,10 +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; } |