From: Graeme Russ <graeme.russ@gmail.com>
Date: Thu, 7 Oct 2010 09:03:28 +0000 (+1100)
Subject: x86: Dont clobber %eax after getting memory size
X-Git-Tag: v2010.12-rc1~149^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5a3876d2ac0aaaf16d50ce91b03c2030822da66f;p=platform%2Fkernel%2Fu-boot.git

x86: Dont clobber %eax after getting memory size

By using another register, reduce code size by one instruction
---

diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S
index 63f7334..66ff4f3 100644
--- a/arch/i386/cpu/start.S
+++ b/arch/i386/cpu/start.S
@@ -114,8 +114,8 @@ mem_ok:
 
 	/* Test the stack */
 	pushl	$0
-	popl	%eax
-	cmpl	$0, %eax
+	popl	%ecx
+	cmpl	$0, %ecx
 	jne	die
 	push	$0x55aa55aa
 	popl	%ecx
@@ -125,7 +125,6 @@ mem_ok:
 	wbinvd
 
 	/* Set the upper memory limit parameter */
-	movl	%esp, %eax
 	subl	$CONFIG_SYS_STACK_SIZE, %eax
 
 	call	board_init_f	/* Enter, U-boot! */