linux-kernel - [2.6 patch] i386: no need to make enable_cpu

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Message-ID: <20070705232249.GW3492@stusta.de>
Date:	Fri, 6 Jul 2007 01:22:50 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	linux-kernel@...r.kernel.org
Subject: [2.6 patch] i386: no need to make enable_cpu_hotplug a variable

As long as there's no write access to this variable there's no reason 
to let gcc check it at runtime.

Signed-off-by: Adrian Bunk <bunk@...sta.de>

---

 arch/i386/kernel/topology.c |    2 --
 include/asm-i386/cpu.h      |    2 +-
 2 files changed, 1 insertion(+), 3 deletions(-)

--- linux-2.6.22-rc6-mm1/include/asm-i386/cpu.h.old	2007-07-04 20:29:25.000000000 +0200
+++ linux-2.6.22-rc6-mm1/include/asm-i386/cpu.h	2007-07-04 20:36:33.000000000 +0200
@@ -13,7 +13,7 @@
 extern int arch_register_cpu(int num);
 #ifdef CONFIG_HOTPLUG_CPU
 extern void arch_unregister_cpu(int);
-extern int enable_cpu_hotplug;
+#define enable_cpu_hotplug	1
 #else
 #define enable_cpu_hotplug	0
 #endif
--- linux-2.6.22-rc6-mm1/arch/i386/kernel/topology.c.old	2007-07-04 20:30:12.000000000 +0200
+++ linux-2.6.22-rc6-mm1/arch/i386/kernel/topology.c	2007-07-04 20:35:56.000000000 +0200
@@ -51,8 +51,6 @@
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-int enable_cpu_hotplug = 1;
-
 void arch_unregister_cpu(int num) {
 	return unregister_cpu(&cpu_devices[num].cpu);
 }

-
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