lkml.org 
[lkml]   [2014]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH v7 6/6] MCS Lock: add Kconfig entries to allow arch-specific hooks
From
Date
This patch adds Kconfig entries to allow architectures to hook into the
MCS lock/unlock functions in the contended case.

From: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
arch/Kconfig | 3 +++
include/linux/mcs_spinlock.h | 8 ++++++++
2 files changed, 11 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index 80bbb8c..8a2a056 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -303,6 +303,9 @@ config HAVE_CMPXCHG_LOCAL
config HAVE_CMPXCHG_DOUBLE
bool

+config HAVE_ARCH_MCS_LOCK
+ bool
+
config ARCH_WANT_IPC_PARSE_VERSION
bool

diff --git a/include/linux/mcs_spinlock.h b/include/linux/mcs_spinlock.h
index d54bb23..d2c02ad 100644
--- a/include/linux/mcs_spinlock.h
+++ b/include/linux/mcs_spinlock.h
@@ -12,6 +12,14 @@
#ifndef __LINUX_MCS_SPINLOCK_H
#define __LINUX_MCS_SPINLOCK_H

+/*
+ * An architecture may provide its own lock/unlock functions for the
+ * contended case.
+ */
+#ifdef CONFIG_HAVE_ARCH_MCS_LOCK
+#include <asm/mcs_spinlock.h>
+#endif
+
struct mcs_spinlock {
struct mcs_spinlock *next;
int locked; /* 1 if lock acquired */
--
1.7.11.7



\
 
 \ /
  Last update: 2014-01-17 01:41    [W:0.089 / U:0.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site