[RFC PATCH v4 27/37] arm64: sleep: Properly set frame pointer before call

[Chen Zhongjin]

From: Julien Thierry <jthierry at redhat.com>

In __cpu_suspend_enter, the FP and LR are properly saved on the stack to
form a stack frame, but the frame pointer is not set afterwards.

Have the frame pointer point to the new frame.

Signed-off-by: Julien Thierry <jthierry at redhat.com>
---
 arch/arm64/kernel/sleep.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S
index 4ea9392f86e0..3bb9b4b2df08 100644
--- a/arch/arm64/kernel/sleep.S
+++ b/arch/arm64/kernel/sleep.S
@@ -91,6 +91,7 @@ SYM_FUNC_START(__cpu_suspend_enter)
 	str	x0, [x1]
 	add	x0, x0, #SLEEP_STACK_DATA_SYSTEM_REGS
 	stp	x29, lr, [sp, #-16]!
+	mov	x29, sp
 	bl	cpu_do_suspend
 	ldp	x29, lr, [sp], #16
 	mov	x0, #1
-- 
2.17.1