From 53ce3d9564908794ae7dd32969089b57df5fc098 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Fri, 9 Jan 2009 12:27:08 -0800
Subject: smp_call_function_single(): be slightly less stupid
If you do
smp_call_function_single(expression-with-side-effects, ...)
then expression-with-side-effects never gets evaluated on UP builds.
As always, implementing it in C is the correct thing to do.
While we're there, uninline it for size and possible header dependency
reasons.
And create a new kernel/up.c, as a place in which to put
uniprocessor-specific code and storage. It should mirror kernel/smp.c.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/smp.h | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
(limited to 'include/linux')
diff --git a/include/linux/smp.h b/include/linux/smp.h
index b8246696810..715196b09d6 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -24,6 +24,9 @@ struct call_single_data {
/* total number of cpus in this system (may exceed NR_CPUS) */
extern unsigned int total_cpus;
+int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
+ int wait);
+
#ifdef CONFIG_SMP
#include <linux/preempt.h>
@@ -79,8 +82,6 @@ smp_call_function_mask(cpumask_t mask, void(*func)(void *info), void *info,
return 0;
}
-int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
- int wait);
void __smp_call_function_single(int cpuid, struct call_single_data *data);
/*
@@ -140,14 +141,6 @@ static inline int up_smp_call_function(void (*func)(void *), void *info)
static inline void smp_send_reschedule(int cpu) { }
#define num_booting_cpus() 1
#define smp_prepare_boot_cpu() do {} while (0)
-#define smp_call_function_single(cpuid, func, info, wait) \
-({ \
- WARN_ON(cpuid != 0); \
- local_irq_disable(); \
- (func)(info); \
- local_irq_enable(); \
- 0; \
-})
#define smp_call_function_mask(mask, func, info, wait) \
(up_smp_call_function(func, info))
#define smp_call_function_many(mask, func, info, wait) \
--
cgit