linux-kernel - [PATCH] i386: flush_cpumask doesn't need "or"

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Message-Id: <1185861582.5495.424.camel@localhost.localdomain>
Date:	Tue, 31 Jul 2007 15:59:42 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linux Kernel list <linux-kernel@...r.kernel.org>
Cc:	Linus Torvalds <torvalds@...l.org>, Andi Kleen <ak@...e.de>
Subject: [PATCH] i386: flush_cpumask doesn't need "or"

Did I miss something or do we needlessly do an "or" to flush_cpumask
while we could just assign it ? We never exit that function with the
mask not empty and we have a spinlock...

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---

Index: linux-work/arch/i386/kernel/smp.c
===================================================================
--- linux-work.orig/arch/i386/kernel/smp.c	2007-07-31 15:54:55.000000000 +1000
+++ linux-work/arch/i386/kernel/smp.c	2007-07-31 15:56:13.000000000 +1000
@@ -375,7 +375,8 @@ void native_flush_tlb_others(const cpuma
 	
 	flush_mm = mm;
 	flush_va = va;
-	cpus_or(flush_cpumask, cpumask, flush_cpumask);
+	flush_cpumask = cpumask;
+
 	/*
 	 * We have to send the IPI only to
 	 * CPUs affected.


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