| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 10/91] MIPS: Handle microMIPS jumps in the same way as MIPS32/MIPS64 jumps | Date | Fri, 10 Mar 2017 10:08:09 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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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 @@ -289,6 +289,8 @@ 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 ||
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