Patch "MIPS: Handle microMIPS jumps in the same way as MIPS32/MIPS64 jumps" has been added to the 4.10-stable tree

[<gregkh@linuxfoundation.org>]

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 4.10-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-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 096a0de427ea333f56f0ee00328cff2a2731bcf1 Mon Sep 17 00:00:00 2001
From: Paul Burton <paul.burton@imgtec.com>
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@imgtec.com>

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@imgtec.com>
Fixes: e7438c4b893e ("MIPS: Fix sibling call handling in get_frame_info")
Cc: Tony Wu <tung7970@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14533/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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@imgtec.com are

queue-4.10/mips-calculate-micromips-ra-properly-when-unwinding-the-stack.patch
queue-4.10/mips-fix-get_frame_info-handling-of-micromips-function-size.patch
queue-4.10/mips-handle-micromips-jumps-in-the-same-way-as-mips32-mips64-jumps.patch
queue-4.10/mips-fix-is_jump_ins-handling-of-16b-micromips-instructions.patch
queue-4.10/mips-clear-isa-bit-correctly-in-get_frame_info.patch
queue-4.10/mips-prevent-unaligned-accesses-during-stack-unwinding.patch