linux-kernel - [PATCH v2 2/2] locking/refcounts, x86/asm: Enable CONFIG_ARCH_HAS

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Date:   Sat,  2 Sep 2017 13:09:46 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Ingo Molnar <mingo@...e.hu>
Cc:     Kees Cook <keescook@...omium.org>, Mike Galbraith <efault@....de>,
        "x86@...nel.org" <x86@...nel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Reshetova, Elena" <elena.reshetova@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: [PATCH v2 2/2] 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.

Cc: Mike Galbraith <efault@....de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index eaa8ff41f424..c6acdcdb3fc6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -56,7 +56,7 @@ config X86
 	select ARCH_HAS_MMIO_FLUSH
 	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
-- 
2.7.4