Commit 7ae4833a authored Oct 13, 2008 by Geert Uytterhoeven Committed by Linus Torvalds Oct 14, 2008

m68k: Define rtc_lock on Atari



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>

parent 3e24fc94

arch/m68k/atari/time.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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)
		{

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