ARM: entry: data abort: avoid using r2 in abort helpers
This allows us to pass the pt_regs pointer in to these functions
ready for tail-calling the abort handler.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/proc-arm6_7.S b/arch/arm/mm/proc-arm6_7.S
index e7be700..d4c328e 100644
--- a/arch/arm/mm/proc-arm6_7.S
+++ b/arch/arm/mm/proc-arm6_7.S
@@ -87,12 +87,12 @@
mov r7, #0x11
orr r7, r7, #0x1100
and r6, r8, r7
- and r2, r8, r7, lsl #1
- add r6, r6, r2, lsr #1
- and r2, r8, r7, lsl #2
- add r6, r6, r2, lsr #2
- and r2, r8, r7, lsl #3
- add r6, r6, r2, lsr #3
+ and r9, r8, r7, lsl #1
+ add r6, r6, r9, lsr #1
+ and r9, r8, r7, lsl #2
+ add r6, r6, r9, lsr #2
+ and r9, r8, r7, lsl #3
+ add r6, r6, r9, lsr #3
add r6, r6, r6, lsr #8
add r6, r6, r6, lsr #4
and r6, r6, #15 @ r6 = no. of registers to transfer.
@@ -117,13 +117,13 @@
tst r8, #1 << 21 @ check writeback bit
moveq pc, lr @ no writeback -> no fixup
.data_arm_lateldrpostconst:
- movs r2, r8, lsl #20 @ Get offset
+ movs r9, r8, lsl #20 @ Get offset
moveq pc, lr @ zero -> no fixup
and r5, r8, #15 << 16 @ Extract 'n' from instruction
ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
tst r8, #1 << 23 @ Check U bit
- subne r7, r7, r2, lsr #20 @ Undo increment
- addeq r7, r7, r2, lsr #20 @ Undo decrement
+ subne r7, r7, r9, lsr #20 @ Undo increment
+ addeq r7, r7, r9, lsr #20 @ Undo decrement
str r7, [sp, r5, lsr #14] @ Put register 'Rn'
mov pc, lr