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[3.13,153/198] arm64: Bug fix in stack alignment exception

Message ID 1405459868-15089-154-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa July 15, 2014, 9:30 p.m. UTC 
3.13.11.5 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: ChiaHao <andy.jhshiu@gmail.com>

commit 3906c2b53cd23c2ae03e6ce41432c8e7f0a3cbbb upstream.

The value of ESR has been stored into x1, and should be directly pass to
do_sp_pc_abort function, "MOV x1, x25" is an extra operation and do_sp_pc_abort
will get the wrong value of ESR.

Signed-off-by: ChiaHao <andy.jhshiu@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/arm64/kernel/entry.S | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 4d2c6f3..013baa0 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -275,7 +275,6 @@  el1_sp_pc:
 	 * Stack or PC alignment exception handling
 	 */
 	mrs	x0, far_el1
-	mov	x1, x25
 	mov	x2, sp
 	b	do_sp_pc_abort
 el1_undef: