This is a note to let you know that I've just added the patch titled
MIPS: Handle microMIPS jumps in the same way as MIPS32/MIPS64 jumps
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-handle-micromips-jumps-in-the-same-way-as-mips32-mips64-jumps.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 096a0de427ea333f56f0ee00328cff2a2731bcf1 Mon Sep 17 00:00:00 2001
From: Paul Burton <paul.burton@xxxxxxxxxx>
Date: Mon, 7 Nov 2016 15:07:07 +0000
Subject: MIPS: Handle microMIPS jumps in the same way as MIPS32/MIPS64 jumps
From: Paul Burton <paul.burton@xxxxxxxxxx>
commit 096a0de427ea333f56f0ee00328cff2a2731bcf1 upstream.
is_jump_ins() checks for plain jump ("j") instructions since commit
e7438c4b893e ("MIPS: Fix sibling call handling in get_frame_info") but
that commit didn't make the same change to the microMIPS code, leaving
it inconsistent with the MIPS32/MIPS64 code. Handle the microMIPS
encoding of the jump instruction too such that it behaves consistently.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
Fixes: e7438c4b893e ("MIPS: Fix sibling call handling in get_frame_info")
Cc: Tony Wu <tung7970@xxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/14533/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/process.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -293,6 +293,8 @@ static inline int is_jump_ins(union mips
return 0;
}
+ if (ip->j_format.opcode == mm_j32_op)
+ return 1;
if (ip->j_format.opcode == mm_jal32_op)
return 1;
if (ip->r_format.opcode != mm_pool32a_op ||
Patches currently in stable-queue which might be from paul.burton@xxxxxxxxxx are
queue-4.9/mips-calculate-micromips-ra-properly-when-unwinding-the-stack.patch
queue-4.9/mips-fix-get_frame_info-handling-of-micromips-function-size.patch
queue-4.9/mips-handle-micromips-jumps-in-the-same-way-as-mips32-mips64-jumps.patch
queue-4.9/mips-fix-is_jump_ins-handling-of-16b-micromips-instructions.patch
queue-4.9/mips-clear-isa-bit-correctly-in-get_frame_info.patch
queue-4.9/mips-prevent-unaligned-accesses-during-stack-unwinding.patch