[PATCH] ARM: Remove argument for disable_irq/enable_irq

Since we do not require a register for these operations, we can
remove this unnecessary argument.

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

arch/arm/kernel/entry-armv.S

@@ -118,7 +118,7 @@ __dabt_svc:
 	@
 	@ IRQs off again before pulling preserved data off the stack
 	@
-	disable_irq r0
+	disable_irq
 
 	@
 	@ restore SPSR and restart the instruction
@@ -198,7 +198,7 @@ __und_svc:
 	@
 	@ IRQs off again before pulling preserved data off the stack
 	@
-1:	disable_irq r0
+1:	disable_irq
 
 	@
 	@ restore SPSR and restart the instruction
@@ -232,7 +232,7 @@ __pabt_svc:
 	@
 	@ IRQs off again before pulling preserved data off the stack
 	@
-	disable_irq r0
+	disable_irq
 
 	@
 	@ restore SPSR and restart the instruction
@@ -316,7 +316,7 @@ __dabt_usr:
 	@
 	@ IRQs on, then call the main handler
 	@
-	enable_irq r2
+	enable_irq
 	mov	r2, sp
 	adr	lr, ret_from_exception
 	b	do_DataAbort
@@ -418,7 +418,7 @@ call_fpe:
 	movcss	r7, r5, lsr #(TIF_USING_IWMMXT + 1)
 	bcs	iwmmxt_task_enable
 #endif
-	enable_irq r7
+	enable_irq
 	add	pc, pc, r8, lsr #6
 	mov	r0, r0
 
@@ -472,7 +472,7 @@ fpundefinstr:
 __pabt_usr:
 	usr_entry abt
 
-	enable_irq r0				@ Enable interrupts
+	enable_irq				@ Enable interrupts
 	mov	r0, r2				@ address (pc)
 	mov	r1, sp				@ regs
 	bl	do_PrefetchAbort		@ call abort handler

arch/arm/kernel/entry-common.S

@@ -30,7 +30,7 @@
  * stack.
  */
 ret_fast_syscall:
-	disable_irq r1				@ disable interrupts
+	disable_irq				@ disable interrupts
 	ldr	r1, [tsk, #TI_FLAGS]
 	tst	r1, #_TIF_WORK_MASK
 	bne	fast_work_pending
@@ -49,7 +49,7 @@ work_pending:
 	mov	r0, sp				@ 'regs'
 	mov	r2, why				@ 'syscall'
 	bl	do_notify_resume
-	disable_irq r1				@ disable interrupts
+	disable_irq				@ disable interrupts
 	b	no_work_pending
 
 work_resched:
@@ -59,7 +59,7 @@ work_resched:
  */
 ENTRY(ret_to_user)
 ret_slow_syscall:
-	disable_irq r1				@ disable interrupts
+	disable_irq				@ disable interrupts
 	ldr	r1, [tsk, #TI_FLAGS]
 	tst	r1, #_TIF_WORK_MASK
 	bne	work_pending
@@ -126,7 +126,7 @@ ENTRY(vector_swi)
 	ldr	ip, [ip]
 	mcr	p15, 0, ip, c1, c0		@ update control register
 #endif
-	enable_irq ip
+	enable_irq
 
 	str	r4, [sp, #-S_OFF]!		@ push fifth arg
 

arch/arm/kernel/entry-header.S

@@ -63,25 +63,21 @@
 #define S_R0		0
 #define S_OFF		8
 
-	.macro	set_cpsr_c, reg, mode
-	msr	cpsr_c, \mode
-	.endm
-
 #if __LINUX_ARM_ARCH__ >= 6
-	.macro	disable_irq, temp
+	.macro	disable_irq
 	cpsid	i
 	.endm
 
-	.macro	enable_irq, temp
+	.macro	enable_irq
 	cpsie	i
 	.endm
 #else
-	.macro	disable_irq, temp
+	.macro	disable_irq
-	set_cpsr_c \temp, #PSR_I_BIT | MODE_SVC
+	msr	cpsr_c, #PSR_I_BIT | SVC_MODE
 	.endm
 
-	.macro	enable_irq, temp
+	.macro	enable_irq
-	set_cpsr_c \temp, #MODE_SVC
+	msr	cpsr_c, #SVC_MODE
 	.endm
 #endif