This is a note to let you know that I've just added the patch titled
crypto: xor - Check for osxsave as well as avx in crypto/xor
to the 3.11-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:
crypto-xor-check-for-osxsave-as-well-as-avx-in-crypto-xor.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From edb6f29464afc65fc73767540b854abf63ae7144 Mon Sep 17 00:00:00 2001
From: John Haxby <john.haxby@xxxxxxxxxx>
Date: Wed, 14 Aug 2013 16:23:18 +0100
Subject: crypto: xor - Check for osxsave as well as avx in crypto/xor
From: John Haxby <john.haxby@xxxxxxxxxx>
commit edb6f29464afc65fc73767540b854abf63ae7144 upstream.
This affects xen pv guests with sufficiently old versions of xen and
sufficiently new hardware. On such a system, a guest with a btrfs
root won't even boot.
Signed-off-by: John Haxby <john.haxby@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Reported-by: Michael Marineau <michael.marineau@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/xor_avx.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/include/asm/xor_avx.h
+++ b/arch/x86/include/asm/xor_avx.h
@@ -167,12 +167,12 @@ static struct xor_block_template xor_blo
#define AVX_XOR_SPEED \
do { \
- if (cpu_has_avx) \
+ if (cpu_has_avx && cpu_has_osxsave) \
xor_speed(&xor_block_avx); \
} while (0)
#define AVX_SELECT(FASTEST) \
- (cpu_has_avx ? &xor_block_avx : FASTEST)
+ (cpu_has_avx && cpu_has_osxsave ? &xor_block_avx : FASTEST)
#else
Patches currently in stable-queue which might be from john.haxby@xxxxxxxxxx are
queue-3.11/crypto-xor-check-for-osxsave-as-well-as-avx-in-crypto-xor.patch
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