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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-05-16 22:11:09 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-17 05:23:04 -0700
commit79974a0e4c6be6e9a3717b4c5a5d5c44c36b1653 (patch)
tree0bf5e98710fa4ae970728ceea7d7d5324f65abcc /include/linux/smp.h
parent8317f14b60c02c69cf7f594e2aabc8a3fdc9618d (diff)
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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>
Diffstat (limited to 'include/linux/smp.h')
-rw-r--r--include/linux/smp.h7
1 files changed, 3 insertions, 4 deletions
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 3f70149eabbb..96ac21f8dd73 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -6,6 +6,7 @@
* Alan Cox. <alan@redhat.com>
*/
+#include <linux/errno.h>
extern void cpu_idle(void);
@@ -99,11 +100,9 @@ static inline void smp_send_reschedule(int cpu) { }
#define num_booting_cpus() 1
#define smp_prepare_boot_cpu() do {} while (0)
static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
- void *info, int retry, int wait)
+ void *info, int retry, int wait)
{
- /* Disable interrupts here? */
- func(info);
- return 0;
+ return -EBUSY;
}
#endif /* !SMP */