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 (file)
--- 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.