Commit 79974a0e authored May 16, 2007 by Heiko Carstens Committed by Linus Torvalds May 17, 2007

Let smp_call_function_single return -EBUSY on UP



All architectures that have an implementation of smp_call_function_single
let it return -EBUSY if it is asked to execute func on the current cpu.
(akpm: except for x86_64).  Therefore the UP version must always return
-EBUSY.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 8317f14b

include/linux/smp.h

+3 −4

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		* Alan Cox. <alan@redhat.com>
		*/

		#include <linux/errno.h>

		extern void cpu_idle(void);

		@@ -101,9 +102,7 @@ static inline void smp_send_reschedule(int cpu) { }
		static inline int smp_call_function_single(int cpuid, void (func) (void info),
		void *info, int retry, int wait)
		{
		/* Disable interrupts here? */
		func(info);
		return 0;
		return -EBUSY;
		}

		#endif /* !SMP */