From: H. Peter Anvin <hpa@zytor.com>
Date: Mon, 10 May 2010 20:41:41 +0000 (-0700)
Subject: x86, fpu: Use the proper asm constraint in use_xsave()
X-Git-Tag: v2.6.35-rc1~514^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dce8bf4e115aa44d590802ce3554e926840c9042;p=pandora-kernel.git

x86, fpu: Use the proper asm constraint in use_xsave()

The proper constraint for a receiving 8-bit variable is "=qm", not
"=g" which equals "=rim"; even though the "i" will never match, bugs
can and do happen due to the difference between "q" and "r".

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1273135546-29690-2-git-send-email-avi@redhat.com>
---

diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h
index 1a8cca33b736..8002e9ce25fc 100644
--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -64,7 +64,7 @@ static inline bool use_xsave(void)
 	alternative_io("mov $0, %0",
 		       "mov $1, %0",
 		       X86_FEATURE_XSAVE,
-		       "=g"(has_xsave));
+		       "=qm" (has_xsave));
 
 	return has_xsave;
 }