diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2006-09-25 16:24:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-10-13 13:23:25 -0700 |
| commit | bb2609621210f46837b70a6b381ffb8e6dc8fb81 (patch) | |
| tree | e9f3eeebbf39fb52559b4ef3d06224014198ca4e /drivers | |
| parent | 46475282edb4e2a0e1892ec3096304bb9c41e5fb (diff) | |
rtc: lockdep fix/workaround
BUG: warning at kernel/lockdep.c:1816/trace_hardirqs_on() (Not tainted)
[<c04051ee>] show_trace_log_lvl+0x58/0x171
[<c0405802>] show_trace+0xd/0x10
[<c040591b>] dump_stack+0x19/0x1b
[<c043abee>] trace_hardirqs_on+0xa2/0x11e
[<c06143c3>] _spin_unlock_irq+0x22/0x26
[<c0541540>] rtc_get_rtc_time+0x32/0x176
[<c0419ba4>] hpet_rtc_interrupt+0x92/0x14d
[<c0450f94>] handle_IRQ_event+0x20/0x4d
[<c0451055>] __do_IRQ+0x94/0xef
[<c040678d>] do_IRQ+0x9e/0xbd
[<c0404a49>] common_interrupt+0x25/0x2c
DWARF2 unwinder stuck at common_interrupt+0x25/0x2c
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/rtc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 6e6a7c7a7ef..ab6429b4a84 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -209,11 +209,12 @@ static const unsigned char days_in_mo[] = */ static inline unsigned char rtc_is_updating(void) { + unsigned long flags; unsigned char uip; - spin_lock_irq(&rtc_lock); + spin_lock_irqsave(&rtc_lock, flags); uip = (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP); - spin_unlock_irq(&rtc_lock); + spin_unlock_irqrestore(&rtc_lock, flags); return uip; } |