Patch "x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()" has been added to the 4.6-stable tree

Patch "x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()" has been added to the 4.6-stable tree

[gregkh]

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 4.6-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-4.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d63dcf49cf5ae5605f4d14229e3888e104f294b1 Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@hpe.com>
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@hpe.com>

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@suse.de>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Elliott <elliott@hpe.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: konrad.wilk@oracle.com
Cc: paul.gortmaker@windriver.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1458769323-24491-4-git-send-email-toshi.kani@hpe.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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
@@ -213,7 +213,7 @@ 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;
 	}
@@ -231,7 +231,7 @@ 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@hpe.com are

queue-4.6/x86-mm-pat-replace-cpu_has_pat-with-boot_cpu_has.patch
queue-4.6/x86-mtrr-fix-xorg-crashes-in-qemu-sessions.patch
queue-4.6/libnvdimm-pfn-dax-fix-initialization-vs-autodetect-for-mode-alignment.patch
queue-4.6/x86-mm-pat-add-support-of-non-default-pat-msr-setting.patch
queue-4.6/x86-xen-pat-remove-pat-table-init-code-from-xen.patch
queue-4.6/x86-mtrr-fix-pat-init-handling-when-mtrr-is-disabled.patch
queue-4.6/x86-mm-pat-add-pat_disable-interface.patch
queue-4.6/x86-mm-pat-fix-bug_on-in-mmap_mem-on-qemu-i386.patch
queue-4.6/x86-pat-document-the-pat-initialization-sequence.patch