linux-kernel - [PATCH v2 4/4] locking/qspinlock_stat: Allow QUEUED_LOCK

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Message-Id: <1548215351-18896-5-git-send-email-longman@redhat.com>
Date:   Tue, 22 Jan 2019 22:49:11 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        x86@...nel.org, Zhenzhong Duan <zhenzhong.duan@...cle.com>,
        James Morse <james.morse@....com>,
        SRINIVAS <srinivas.eeda@...cle.com>,
        Waiman Long <longman@...hat.com>
Subject: [PATCH v2 4/4] locking/qspinlock_stat: Allow QUEUED_LOCK_STAT for all archs

The QUEUED_LOCK_STAT option to report queued spinlocks statistics was
previously allowed only on x86 architecture. Now queued spinlocks are
used in multiple architectures, we now allow QUEUED_LOCK_STAT to be
enabled for all those architectures that use queued spinlocks. This
option is listed as part of the general architecture-dependent options.

Signed-off-by: Waiman Long <longman@...hat.com>
---
 arch/Kconfig     | 7 +++++++
 arch/x86/Kconfig | 8 --------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 4cfb6de..c82e32f 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -885,6 +885,13 @@ config HAVE_ARCH_PREL32_RELOCATIONS
 	  architectures, and don't require runtime relocation on relocatable
 	  kernels.
 
+config QUEUED_LOCK_STAT
+	bool "Queued spinlock statistics"
+	depends on QUEUED_SPINLOCKS && DEBUG_FS
+	---help---
+	  Enable the collection of statistical data on the slowpath
+	  behavior of queued spinlocks and report them on debugfs.
+
 source "kernel/gcov/Kconfig"
 
 source "scripts/gcc-plugins/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4b4a7f3..872e681 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -784,14 +784,6 @@ config PARAVIRT_SPINLOCKS
 
 	  If you are unsure how to answer this question, answer Y.
 
-config QUEUED_LOCK_STAT
-	bool "Paravirt queued spinlock statistics"
-	depends on PARAVIRT_SPINLOCKS && DEBUG_FS
-	---help---
-	  Enable the collection of statistical data on the slowpath
-	  behavior of paravirtualized queued spinlocks and report
-	  them on debugfs.
-
 source "arch/x86/xen/Kconfig"
 
 config KVM_GUEST
-- 
1.8.3.1