[PATCH 4.4 25/49] x86/mm/pat: Replace cpu_has_pat with boot_cpu_has() - Greg Kroah-Hartman

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	xen-devel@lists.xenproject.org, Toshi Kani <toshi.kani@hpe.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	stable@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>,
	paul.gortmaker@windriver.com, Ingo Molnar <mingo@kernel.org>,
	Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
	Toshi Kani <toshi.kani@hp.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Borislav Petkov <bp@suse.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Robert Elliott <elliott@hpe.com>
Subject: [PATCH 4.4 25/49] x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()
Date: Sun, 14 Aug 2016 22:23:25 +0200	[thread overview]
Message-ID: <20160814202303.871241183__48639.6812405021$1471206367$gmane$org@linuxfoundation.org> (raw)
In-Reply-To: <20160814202302.493206349@linuxfoundation.org>

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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
@@ -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.



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