From: Anson Huang <b20788@freescale.com>
Date: Tue, 9 Oct 2012 15:04:42 +0000 (-0400)
Subject: ENGR00227425 mx6sl: Need to save all registers before calling C function
X-Git-Tag: v3.0.35-fsl_4.1.0~550
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e7295cfe3a6b93e366665354c6cc9edb4485d8d6;p=karo-tx-linux.git

ENGR00227425 mx6sl: Need to save all registers before calling C function

Different linker may use r12, we should save/restore all
registers(r0-r12) before calling C function to prevent
these registers from corruption in C code.

Signed-off-by: Anson Huang <b20788@freescale.com>
---

diff --git a/arch/arm/mach-mx6/mx6_suspend.S b/arch/arm/mach-mx6/mx6_suspend.S
index a5815ef9bd6f..683ba38b0519 100644
--- a/arch/arm/mach-mx6/mx6_suspend.S
+++ b/arch/arm/mach-mx6/mx6_suspend.S
@@ -1519,11 +1519,11 @@ restore control register to enable cache
 #endif
 
 	mov	r8, lr
-	push	{r0}
+	push	{r0-r12}
 
 	/* Set up the per-CPU stacks */
 	bl	cpu_init
-	pop	{r0}
+	pop	{r0-r12}
 
 	/*
 	 * Restore the MMU table entry that was modified for