ARM: entry: re-allocate registers in irq entry assembly macros

This avoids the irq entry assembly corrupting r5, thereby allowing it
to be preserved through to the svc exit code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 12 insertions, 12 deletions

diff --git a/arch/arm/include/asm/entry-macro-multi.S b/arch/arm/include/asm/entry-macro-multi.S
index 2da8547de6d6..2f1e2098dfe7 100644
--- a/arch/arm/include/asm/entry-macro-multi.S
+++ b/arch/arm/include/asm/entry-macro-multi.S
@@ -4,8 +4,8 @@
  * Interrupt handling.  Preserves r7, r8, r9
  */
         .macro  arch_irq_handler_default
-        get_irqnr_preamble r5, lr
-1:      get_irqnr_and_base r0, r6, r5, lr
+        get_irqnr_preamble r6, lr
+1:      get_irqnr_and_base r0, r2, r6, lr
         movne   r1, sp
         @
         @ routine called with r0 = irq number, r1 = struct pt_regs *
@@ -17,17 +17,17 @@
         /*
          * XXX
          *
-         * this macro assumes that irqstat (r6) and base (r5) are
+         * this macro assumes that irqstat (r2) and base (r6) are
          * preserved from get_irqnr_and_base above
          */
-        ALT_SMP(test_for_ipi r0, r6, r5, lr)
+        ALT_SMP(test_for_ipi r0, r2, r6, lr)
         ALT_UP_B(9997f)
         movne   r1, sp
         adrne   lr, BSYM(1b)
         bne     do_IPI
 
 #ifdef CONFIG_LOCAL_TIMERS
-        test_for_ltirq r0, r6, r5, lr
+        test_for_ltirq r0, r2, r6, lr
         movne   r0, sp
         adrne   lr, BSYM(1b)
         bne     do_local_timer
@@ -40,7 +40,7 @@
         .align  5
         .global \symbol_name
 \symbol_name:
-        mov     r4, lr
+        mov     r8, lr
         arch_irq_handler_default
-        mov     pc, r4
+        mov     pc, r8
         .endm
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index a5b2c40d44e8..b17e57949d3b 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -29,16 +29,16 @@
 #include <asm/entry-macro-multi.S>
 
 /*
- * Interrupt handling.  Preserves r7, r8, r9
+ * Interrupt handling.
  */
         .macro  irq_handler
 #ifdef CONFIG_MULTI_IRQ_HANDLER
-        ldr     r5, =handle_arch_irq
+        ldr     r1, =handle_arch_irq
         mov     r0, sp
-        ldr     r5, [r5]
+        ldr     r1, [r1]
         adr     lr, BSYM(9997f)
-        teq     r5, #0
-        movne   pc, r5
+        teq     r1, #0
+        movne   pc, r1
 #endif
         arch_irq_handler_default
 9997: