From: Michal Simek <monstr@monstr.eu>
Date: Fri, 19 Mar 2010 11:50:35 +0000 (+0100)
Subject: microblaze: Remove additional resr and rear loading
X-Git-Tag: v2.6.34-rc4~89^2~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bd1637d63e82aaf732ffbe907ba887fa12e82df4;p=platform%2Fkernel%2Flinux-3.10.git

microblaze: Remove additional resr and rear loading

RESR and REAR uses the same regs in whole file.

Signed-off-by: Michal Simek <monstr@monstr.eu>
---

diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index a652add..5d8c3de 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -562,20 +562,16 @@ ex_handler_done:
 		 */
 		mfs	r11, rpid
 		nop
-		mfs	r3, rear		/* Get faulting address */
-		nop
 		/* If we are faulting a kernel address, we have to use the
 		 * kernel page tables.
 		 */
-		ori	r4, r0, CONFIG_KERNEL_START
-		cmpu	r4, r3, r4
-		bgti	r4, ex3
+		ori	r5, r0, CONFIG_KERNEL_START
+		cmpu	r5, r3, r5
+		bgti	r5, ex3
 		/* First, check if it was a zone fault (which means a user
 		 * tried to access a kernel or read-protected page - always
 		 * a SEGV). All other faults here must be stores, so no
 		 * need to check ESR_S as well. */
-		mfs	r4, resr
-		nop
 		andi	r4, r4, 0x800		/* ESR_Z - zone protection */
 		bnei	r4, ex2
 
@@ -590,8 +586,6 @@ ex_handler_done:
 		 * tried to access a kernel or read-protected page - always
 		 * a SEGV). All other faults here must be stores, so no
 		 * need to check ESR_S as well. */
-		mfs	r4, resr
-		nop
 		andi	r4, r4, 0x800		/* ESR_Z */
 		bnei	r4, ex2
 		/* get current task address */
@@ -666,8 +660,6 @@ ex_handler_done:
 		 * R3 = ESR
 		 */
 
-		mfs	r3, rear		/* Get faulting address */
-		nop
 		RESTORE_STATE;
 		bri	page_fault_instr_trap
 
@@ -682,8 +674,6 @@ ex_handler_done:
 		 */
 		mfs	r11, rpid
 		nop
-		mfs	r3, rear		/* Get faulting address */
-		nop
 
 		/* If we are faulting a kernel address, we have to use the
 		 * kernel page tables. */
@@ -754,8 +744,6 @@ ex_handler_done:
 		 */
 		mfs	r11, rpid
 		nop
-		mfs	r3, rear		/* Get faulting address */
-		nop
 
 		/* If we are faulting a kernel address, we have to use the
 		 * kernel page tables.