[PATCH 2/3] RFC: ARM: head: Save lr in r11 while setting up page tables

[Linus Walleij]

We might need to use lr as we want to be able to call
the debug print functions, so save lr to r11 and restore
lr from r11 in __create_page_tables.

Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
 arch/arm/kernel/head.S | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 2bfdf33aa74c..8b089c4c0d17 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -171,10 +171,11 @@ ENDPROC(stext)
  * r8 = phys_offset, r9 = cpuid, r10 = procinfo
  *
  * Returns:
- *  r0, r3, r5-r7 corrupted
+ *  r0, r3, r5-r7, r11 corrupted
  *  r4 = physical page table address
  */
 __create_page_tables:
+	mov	r11, lr				@ we need to be able to call prints
 	pgtbl	r4, r8				@ page table address
 
 	/*
@@ -350,6 +351,7 @@ __create_page_tables:
 #ifdef CONFIG_ARM_LPAE
 	sub	r4, r4, #0x1000		@ point to the PGD table
 #endif
+	mov	lr, r11
 	ret	lr
 ENDPROC(__create_page_tables)
 	.ltorg
-- 
2.26.2