This is a note to let you know that I've just added the patch titled
x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
to the 4.4-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:
x86-asm-32-make-sync_core-handle-missing-cpuid-on-all-32-bit-kernels.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
From 1c52d859cb2d417e7216d3e56bb7fea88444cec9 Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <[email protected]>
Date: Fri, 9 Dec 2016 10:24:05 -0800
Subject: x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
From: Andy Lutomirski <[email protected]>
commit 1c52d859cb2d417e7216d3e56bb7fea88444cec9 upstream.
We support various non-Intel CPUs that don't have the CPUID
instruction, so the M486 test was wrong. For now, fix it with a big
hammer: handle missing CPUID on all 32-bit CPUs.
Reported-by: One Thousand Gnomes <[email protected]>
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Matthew Whitehead <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Henrique de Moraes Holschuh <[email protected]>
Cc: Andrew Cooper <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: xen-devel <[email protected]>
Link:
http://lkml.kernel.org/r/685bd083a7c036f7769510b6846315b17d6ba71f.1481307769.git.l...@kernel.org
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: "Zhang, Ning A" <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -574,7 +574,7 @@ static inline void sync_core(void)
{
int tmp;
-#ifdef CONFIG_M486
+#ifdef CONFIG_X86_32
/*
* Do a CPUID if available, otherwise do a jump. The jump
* can conveniently enough be the jump around CPUID.
Patches currently in stable-queue which might be from [email protected] are
queue-4.4/x86-asm-32-make-sync_core-handle-missing-cpuid-on-all-32-bit-kernels.patch
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