[PATCH 2/3] ARM v7: v7_mmu_cache_flush(): do not restore r0-r3 (minor optimization)

[Enrico Scholz]

Registers 'r0' till 'r3' are scratch registers and do not need to be
restored.

Signed-off-by: Enrico Scholz <enrico.scholz at sigma-chemnitz.de>
---
 arch/arm/cpu/cache-armv7.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/cpu/cache-armv7.S b/arch/arm/cpu/cache-armv7.S
index 5bdf7e4..5595cf6 100644
--- a/arch/arm/cpu/cache-armv7.S
+++ b/arch/arm/cpu/cache-armv7.S
@@ -65,7 +65,7 @@ ENTRY(v7_mmu_cache_flush)
 		mcr	p15, 0, r12, c7, c14, 0	@ clean+invalidate D
 		b	iflush
 hierarchical:
-		stmfd	sp!, {r0-r7, r9-r11}
+		stmfd	sp!, {r4-r7, r9-r11}
 		mcr	p15, 0, r12, c7, c10, 5	@ DMB
 		mrc	p15, 1, r0, c0, c0, 1	@ read clidr
 		ands	r3, r0, #0x7000000	@ extract loc from clidr
@@ -107,7 +107,7 @@ skip:
 		cmp	r3, r12
 		bgt	loop1
 finished:
-		ldmfd	sp!, {r0-r7, r9-r11}
+		ldmfd	sp!, {r4-r7, r9-r11}
 		mov	r12, #0			@ switch back to cache level 0
 		mcr	p15, 2, r12, c0, c0, 0	@ select current cache level in cssr
 iflush:
-- 
1.8.1.4