[PATCH 08/30] ARM: sleep.S: use PC-relative insn sequence for sleep_save_sp/mpidr_hash
From: Ard Biesheuvel <hidden>
Date: 2017-08-14 12:53:49
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Replace the open coded PC relative offset calculations with adr_l and ldr_l invocations. Signed-off-by: Ard Biesheuvel <redacted> --- arch/arm/kernel/sleep.S | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-)
diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S
index 0f6c1000582c..3026b119d3ff 100644
--- a/arch/arm/kernel/sleep.S
+++ b/arch/arm/kernel/sleep.S@@ -137,9 +137,8 @@ ARM_BE8(setend be) @ ensure we are in BE mode mov r1, #0 ALT_SMP(mrc p15, 0, r0, c0, c0, 5) ALT_UP_B(1f) - adr r2, mpidr_hash_ptr - ldr r3, [r2] - add r2, r2, r3 @ r2 = struct mpidr_hash phys address + adr_l r2, mpidr_hash @ r2 = struct mpidr_hash phys address + /* * This ldmia relies on the memory layout of the mpidr_hash * struct mpidr_hash.
@@ -147,10 +146,7 @@ ARM_BE8(setend be) @ ensure we are in BE mode ldmia r2, { r3-r6 } @ r3 = mpidr mask (r4,r5,r6) = l[0,1,2] shifts compute_mpidr_hash r1, r4, r5, r6, r0, r3 1: - adr r0, _sleep_save_sp - ldr r2, [r0] - add r0, r0, r2 - ldr r0, [r0, #SLEEP_SAVE_SP_PHYS] + ldr_l r0, sleep_save_sp + SLEEP_SAVE_SP_PHYS ldr r0, [r0, r1, lsl #2] @ load phys pgd, stack, resume fn
@@ -164,12 +160,6 @@ ENDPROC(cpu_resume) ENDPROC(cpu_resume_arm) #endif - .align 2 -_sleep_save_sp: - .long sleep_save_sp - . -mpidr_hash_ptr: - .long mpidr_hash - . @ mpidr_hash struct offset - .data .type sleep_save_sp, #object ENTRY(sleep_save_sp)
--
2.11.0