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DateTue, 8 May 2007 17:24:15 +0200
FromAndi Kleen <>
SubjectRe: 2.6.21-mm1 -- x86 verify_cpu.S compile failure
On Tue, May 08, 2007 at 10:46:20AM +0100, Andy Whitcroft wrote:
> We are seeing the following compile error on older x86 installs:
> 
>   arch/i386/kernel/verify_cpu.S: Assembler messages:
>   arch/i386/kernel/verify_cpu.S:13: Error: `(%esp)' is
> 			 not a valid 16 bit base/index expression
> 
> Seems to come from:
> 
>   x86_64-mm-i386-verify-cpu
> 
> Compiler:
> 
>   gcc version 3.3.4 (Debian 1:3.3.4-3)

Your compiler must be a brother in spirit of Andrew's vaio.

Does this patch help? 

-Andi


Index: linux/arch/i386/kernel/verify_cpu.S
===================================================================
--- linux.orig/arch/i386/kernel/verify_cpu.S
+++ linux/arch/i386/kernel/verify_cpu.S
@@ -10,7 +10,9 @@ verify_cpu:
 
 #if CONFIG_X86_MINIMUM_CPU_MODEL >= 4
 	pushfl
-	orl	$(1<<18),(%esp)		# try setting AC
+	pop	%eax
+	orl	$(1<<18),%eax		# try setting AC
+	push	%eax
 	popfl
 	pushfl
 	popl    %eax

-
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