linux-kernel - [tip:locking/core] locking/refcounts, x86/asm: Enable CONFIG_ARCH_HAS

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Date:   Thu, 28 Sep 2017 03:58:50 -0700
From:   tip-bot for Kees Cook <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     keescook@...omium.org, hpa@...or.com, tglx@...utronix.de,
        ard.biesheuvel@...aro.org, peterz@...radead.org,
        linux-arch@...r.kernel.org, torvalds@...ux-foundation.org,
        elena.reshetova@...el.com, mingo@...nel.org,
        linux-kernel@...r.kernel.org, efault@....de
Subject: [tip:locking/core] locking/refcounts, x86/asm: Enable
 CONFIG_ARCH_HAS_REFCOUNT

Commit-ID:  39208aa7ecb7d9c4e86df782b5693270313cbab1
Gitweb:     https://git.kernel.org/tip/39208aa7ecb7d9c4e86df782b5693270313cbab1
Author:     Kees Cook <keescook@...omium.org>
AuthorDate: Sat, 2 Sep 2017 13:09:46 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 28 Sep 2017 09:45:05 +0200

locking/refcounts, x86/asm: Enable CONFIG_ARCH_HAS_REFCOUNT

With the section inlining bug fixed for the x86 refcount protection,
we can turn the config back on.

Signed-off-by: Kees Cook <keescook@...omium.org>
Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: Elena <elena.reshetova@...el.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-arch <linux-arch@...r.kernel.org>
Link: http://lkml.kernel.org/r/1504382986-49301-3-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 971feac..9053564 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -55,7 +55,7 @@ config X86
 	select ARCH_HAS_KCOV			if X86_64
 	select ARCH_HAS_PMEM_API		if X86_64
 	# Causing hangs/crashes, see the commit that added this change for details.
-	select ARCH_HAS_REFCOUNT		if BROKEN
+	select ARCH_HAS_REFCOUNT
 	select ARCH_HAS_UACCESS_FLUSHCACHE	if X86_64
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_SG_CHAIN