From: Andi Kleen <ak@suse.de>
Date: Sat, 25 Mar 2006 15:30:58 +0000 (+0100)
Subject: [PATCH] x86_64: Limit max number of CPUs to 255
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=01d4bed417b5943577e9290fbf672ea9a449dc46;p=deliverable%2Flinux.git

[PATCH] x86_64: Limit max number of CPUs to 255

Because 256 causes overflows in some code that stores them in 8 bit
fields and the x86 APIC architecture cannot handle more than 255
anyways.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 24a3016c079d..6fc631457196 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -323,7 +323,7 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
 
 config NR_CPUS
 	int "Maximum number of CPUs (2-256)"
-	range 2 256
+	range 2 255
 	depends on SMP
 	default "8"
 	help