From cd1b76bb73d0f735cc9aa076c121fd172752445b Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Thu, 3 Mar 2016 17:31:32 +0100
Subject: [PATCH] arm64: efi: add missing frame pointer assignment

The prologue of the EFI entry point pushes x29 and x30 onto the stack but
fails to create the stack frame correctly by omitting the assignment of x29
to the new value of the stack pointer. So fix that.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/efi-entry.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/efi-entry.S b/arch/arm64/kernel/efi-entry.S
index f82036e02485..cae3112f7791 100644
--- a/arch/arm64/kernel/efi-entry.S
+++ b/arch/arm64/kernel/efi-entry.S
@@ -35,6 +35,7 @@ ENTRY(entry)
 	 * for image_addr variable passed to efi_entry().
 	 */
 	stp	x29, x30, [sp, #-32]!
+	mov	x29, sp
 
 	/*
 	 * Call efi_entry to do the real work.