ARM: pm: only use preallocated page table during resume

Only use the preallocated page table during the resume, not while
suspending.  This avoids the overhead of having to switch unnecessarily
to the resume page table in the suspend path.

Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 10 insertions, 11 deletions

diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index 37dbadadf7c4..3277904bebaf 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -520,24 +520,23 @@ ENTRY(cpu_xscale_set_pte_ext)
         .align
 
 .globl  cpu_xscale_suspend_size
-.equ    cpu_xscale_suspend_size, 4 * 7
+.equ    cpu_xscale_suspend_size, 4 * 6
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_xscale_do_suspend)
-        stmfd   sp!, {r4 - r10, lr}
+        stmfd   sp!, {r4 - r9, lr}
         mrc     p14, 0, r4, c6, c0, 0   @ clock configuration, for turbo mode
         mrc     p15, 0, r5, c15, c1, 0  @ CP access reg
         mrc     p15, 0, r6, c13, c0, 0  @ PID
         mrc     p15, 0, r7, c3, c0, 0   @ domain ID
-        mrc     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mrc     p15, 0, r9, c1, c1, 0   @ auxiliary control reg
-        mrc     p15, 0, r10, c1, c0, 0  @ control reg
+        mrc     p15, 0, r8, c1, c1, 0   @ auxiliary control reg
+        mrc     p15, 0, r9, c1, c0, 0   @ control reg
         bic     r4, r4, #2              @ clear frequency change bit
-        stmia   r0, {r4 - r10}          @ store cp regs
-        ldmfd   sp!, {r4 - r10, pc}
+        stmia   r0, {r4 - r9}           @ store cp regs
+        ldmfd   sp!, {r4 - r9, pc}
 ENDPROC(cpu_xscale_do_suspend)
 
 ENTRY(cpu_xscale_do_resume)
-        ldmia   r0, {r4 - r10}          @ load cp regs
+        ldmia   r0, {r4 - r9}           @ load cp regs
         mov     ip, #0
         mcr     p15, 0, ip, c8, c7, 0   @ invalidate I & D TLBs
         mcr     p15, 0, ip, c7, c7, 0   @ invalidate I & D caches, BTB
@@ -545,9 +544,9 @@ ENTRY(cpu_xscale_do_resume)
         mcr     p15, 0, r5, c15, c1, 0  @ CP access reg
         mcr     p15, 0, r6, c13, c0, 0  @ PID
         mcr     p15, 0, r7, c3, c0, 0   @ domain ID
-        mcr     p15, 0, r8, c2, c0, 0   @ translation table base addr
-        mcr     p15, 0, r9, c1, c1, 0   @ auxiliary control reg
-        mov     r0, r10                 @ control register
+        mcr     p15, 0, r1, c2, c0, 0   @ translation table base addr
+        mcr     p15, 0, r8, c1, c1, 0   @ auxiliary control reg
+        mov     r0, r9                  @ control register
         b       cpu_resume_mmu
 ENDPROC(cpu_xscale_do_resume)
 #endif