This is a note to let you know that I've just added the patch titled
MIPS: BPF: Avoid unreachable code on little endian
to the 4.2-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-bpf-avoid-unreachable-code-on-little-endian.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From faa9724a674e5e52316bb0d173aed16bd17d536c Mon Sep 17 00:00:00 2001
From: Aurelien Jarno <aurelien@xxxxxxxxxxx>
Date: Sat, 5 Sep 2015 18:46:56 +0200
Subject: MIPS: BPF: Avoid unreachable code on little endian
From: Aurelien Jarno <aurelien@xxxxxxxxxxx>
commit faa9724a674e5e52316bb0d173aed16bd17d536c upstream.
On little endian, avoid generating the big endian version of the code
by using #else in addition to #ifdef #endif. Also fix one alignment
issue wrt delay slot.
Signed-off-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
Reviewed-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/11097/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/net/bpf_jit_asm.S | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/arch/mips/net/bpf_jit_asm.S
+++ b/arch/mips/net/bpf_jit_asm.S
@@ -151,9 +151,10 @@ NESTED(bpf_slow_path_word, (6 * SZREG),
wsbh t0, $r_s0
jr $r_ra
rotr $r_A, t0, 16
-#endif
+#else
jr $r_ra
- move $r_A, $r_s0
+ move $r_A, $r_s0
+#endif
END(bpf_slow_path_word)
@@ -162,9 +163,10 @@ NESTED(bpf_slow_path_half, (6 * SZREG),
#ifdef CONFIG_CPU_LITTLE_ENDIAN
jr $r_ra
wsbh $r_A, $r_s0
-#endif
+#else
jr $r_ra
move $r_A, $r_s0
+#endif
END(bpf_slow_path_half)
Patches currently in stable-queue which might be from aurelien@xxxxxxxxxxx are
queue-4.2/mips-bpf-fix-build-on-pre-r2-little-endian-cpus.patch
queue-4.2/mips-bpf-avoid-unreachable-code-on-little-endian.patch
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