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m68k: Define rtc_lock on Atari

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The nvram and rtc-cmos drivers use the spinlock rtc_lock to protect against
concurrent accesses to the CMOS memory. As m68k doesn't support SMP or preempt
yet, the spinlock calls tend to get optimized away, but not for all
configurations, causing in some rare cases:

| ERROR: "rtc_lock" [drivers/rtc/rtc-cmos.ko] undefined!
| ERROR: "rtc_lock" [drivers/char/nvram.ko] undefined!

Add the spinlock to the Atari core code to avoid this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven 2008-10-13 21:58:55 +02:00 committed by Linus Torvalds
parent 3e24fc947c
commit 7ae4833af0
1 changed files with 3 additions and 0 deletions
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3
arch/m68k/atari/time.c
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@ -20,6 +20,9 @@
#include <asm/atariints.h>
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL_GPL(rtc_lock);
void __init
atari_sched_init(irq_handler_t timer_routine)
{