linux-kernel - [PATCH] powerpc: Allow smp_call_function

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Message-Id: <11848592284075-git-send-email-avi@qumranet.com>
Date:	Thu, 19 Jul 2007 18:33:48 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	paulus@...ba.org
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	kvm-devel@...ts.sourceforge.net, Avi Kivity <avi@...ranet.com>
Subject: [PATCH] powerpc: Allow smp_call_function_single() to current cpu

This removes the requirement for callers to get_cpu() to check in simple
cases.  i386 and x86_64 already received a similar treatment.

Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 arch/powerpc/kernel/smp.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index d577b71..087c92f 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -284,7 +284,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int
 			int wait)
 {
 	cpumask_t map = CPU_MASK_NONE;
-	int ret = -EBUSY;
+	int ret = 0;
 
 	if (!cpu_online(cpu))
 		return -EINVAL;
@@ -292,6 +292,11 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int
 	cpu_set(cpu, map);
 	if (cpu != get_cpu())
 		ret = smp_call_function_map(func,info,nonatomic,wait,map);
+	else {
+		local_irq_disable();
+		func(info);
+		local_irq_enable();
+	}
 	put_cpu();
 	return ret;
 }
-- 
1.5.2.4

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