This is a note to let you know that I've just added the patch titled
x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()
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-mm-pat-replace-cpu_has_pat-with-boot_cpu_has.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 <stable@xxxxxxxxxxxxxxx> know about it.
>From d63dcf49cf5ae5605f4d14229e3888e104f294b1 Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@xxxxxxx>
Date: Wed, 23 Mar 2016 15:41:59 -0600
Subject: x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()
From: Toshi Kani <toshi.kani@xxxxxxx>
commit d63dcf49cf5ae5605f4d14229e3888e104f294b1 upstream.
Borislav Petkov suggested:
> Please use on init paths boot_cpu_has(X86_FEATURE_PAT) and on fast
> paths static_cpu_has(X86_FEATURE_PAT). No more of that cpu_has_XXX
> ugliness.
Replace the use of cpu_has_pat on init paths with boot_cpu_has().
Suggested-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Luis R. Rodriguez <mcgrof@xxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Robert Elliott <elliott@xxxxxxx>
Cc: Toshi Kani <toshi.kani@xxxxxx>
Cc: konrad.wilk@xxxxxxxxxx
Cc: paul.gortmaker@xxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1458769323-24491-4-git-send-email-toshi.kani@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/pat.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -212,7 +212,7 @@ static void pat_bsp_init(u64 pat)
{
u64 tmp_pat;
- if (!cpu_has_pat) {
+ if (!boot_cpu_has(X86_FEATURE_PAT)) {
pat_disable("PAT not supported by CPU.");
return;
}
@@ -230,7 +230,7 @@ static void pat_bsp_init(u64 pat)
static void pat_ap_init(u64 pat)
{
- if (!cpu_has_pat) {
+ if (!boot_cpu_has(X86_FEATURE_PAT)) {
/*
* If this happens we are on a secondary CPU, but switched to
* PAT on the boot CPU. We have no way to undo PAT.
Patches currently in stable-queue which might be from toshi.kani@xxxxxxx are
queue-4.4/x86-mm-pat-replace-cpu_has_pat-with-boot_cpu_has.patch
queue-4.4/x86-mtrr-fix-xorg-crashes-in-qemu-sessions.patch
queue-4.4/x86-mm-pat-add-support-of-non-default-pat-msr-setting.patch
queue-4.4/x86-xen-pat-remove-pat-table-init-code-from-xen.patch
queue-4.4/x86-mtrr-fix-pat-init-handling-when-mtrr-is-disabled.patch
queue-4.4/x86-mm-pat-add-pat_disable-interface.patch
queue-4.4/x86-mm-pat-fix-bug_on-in-mmap_mem-on-qemu-i386.patch
queue-4.4/x86-pat-document-the-pat-initialization-sequence.patch
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