linux-kernel - [tip:x86/fpu] x86/fpu: Use using_compacted_format() instead of open coded X86_FEATURE

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Date:   Tue, 26 Sep 2017 01:37:53 -0700
From:   tip-bot for Eric Biggers <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dvyukov@...gle.com, keescook@...omium.org, haokexin@...il.com,
        akpm@...ux-foundation.org, fenghua.yu@...el.com, luto@...nel.org,
        bp@...en8.de, peterz@...radead.org, ebiggers3@...il.com,
        dave.hansen@...ux.intel.com, mhalcrow@...gle.com,
        torvalds@...ux-foundation.org, riel@...hat.com,
        ebiggers@...gle.com, linux-kernel@...r.kernel.org,
        mingo@...nel.org, wanpeng.li@...mail.com, hpa@...or.com,
        tglx@...utronix.de, yu-cheng.yu@...el.com, luto@...capital.net,
        oleg@...hat.com
Subject: [tip:x86/fpu] x86/fpu: Use using_compacted_format() instead of open
 coded X86_FEATURE_XSAVES

Commit-ID:  738f48cb5fdd5878d11934f1898aa2bcf1578289
Gitweb:     http://git.kernel.org/tip/738f48cb5fdd5878d11934f1898aa2bcf1578289
Author:     Eric Biggers <ebiggers@...gle.com>
AuthorDate: Sun, 24 Sep 2017 12:59:13 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 26 Sep 2017 09:43:48 +0200

x86/fpu: Use using_compacted_format() instead of open coded X86_FEATURE_XSAVES

This is the canonical method to use.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Eric Biggers <ebiggers3@...il.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Kevin Hao <haokexin@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Michael Halcrow <mhalcrow@...gle.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Wanpeng Li <wanpeng.li@...mail.com>
Cc: Yu-cheng Yu <yu-cheng.yu@...el.com>
Cc: kernel-hardening@...ts.openwall.com
Link: http://lkml.kernel.org/r/20170924105913.9157-11-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/fpu/regset.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c
index b831d5b..3ea1513 100644
--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -134,7 +134,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
 
 	fpu__prepare_write(fpu);
 
-	if (boot_cpu_has(X86_FEATURE_XSAVES)) {
+	if (using_compacted_format()) {
 		if (kbuf)
 			ret = copy_kernel_to_xstate(xsave, kbuf);
 		else