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ARM: 6939/1: fix missing 'cpu_relax()' declaration

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ARM build fails with the following symptom:

  CC      arch/arm/kernel/asm-offsets.s
In file included from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:56,
                 from include/linux/sched.h:57,
                 from arch/arm/kernel/asm-offsets.c:13:
include/linux/spinlock.h: In function 'spin_unlock_wait':
include/linux/spinlock.h:360: error: implicit declaration of function 'cpu_relax'
make[1]: *** [arch/arm/kernel/asm-offsets.s] Error 1

Fix it by including <asm/processor.h>.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Marc Zyngier 2011-05-23 17:16:59 +01:00 committed by Russell King
parent 57ce9bb39b
commit 603605abae
1 changed files with 2 additions and 0 deletions
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2
arch/arm/include/asm/spinlock.h
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@ -5,6 +5,8 @@
#error SMP not supported on pre-ARMv6 CPUs #error SMP not supported on pre-ARMv6 CPUs
#endif #endif
#include <asm/processor.h>
/* /*
* sev and wfe are ARMv6K extensions. Uniprocessor ARMv6 may not have the K * sev and wfe are ARMv6K extensions. Uniprocessor ARMv6 may not have the K
* extensions, so when running on UP, we have to patch these instructions away. * extensions, so when running on UP, we have to patch these instructions away.