[tip:x86/trampoline] x86, realmode: Fix always-zero test in reboot_32.S

[tip-bot for H. Peter Anvin]

Commit-ID:  6feb592dceaed1a6cf26c9747b1180958d5156cd
Gitweb:     http://git.kernel.org/tip/6feb592dceaed1a6cf26c9747b1180958d5156cd
Author:     H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
AuthorDate: Tue, 8 May 2012 21:22:39 +0300
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Tue, 8 May 2012 11:48:04 -0700

x86, realmode: Fix always-zero test in reboot_32.S

A test instruction is an "and", and an and with zero is always zero.
This would cause us to always take the BIOS path, not the APM path, in
case anyone actually cares...

Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1336501366-28617-17-git-send-email-jarkko.sakkinen@xxxxxxxxx
---
 arch/x86/realmode/rm/reboot_32.S |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/realmode/rm/reboot_32.S b/arch/x86/realmode/rm/reboot_32.S
index e90f8c4..50ba994 100644
--- a/arch/x86/realmode/rm/reboot_32.S
+++ b/arch/x86/realmode/rm/reboot_32.S
@@ -85,7 +85,7 @@ machine_real_restart_asm16:
 	movl	%edx, %cr0
 	LJMPW_RM(3f)
 3:
-	testb	$0, %al
+	andw	%ax, %ax
 	jz	bios
 
 apm:
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