From 145d978585977438ebb55079487827006c604e39 Mon Sep 17 00:00:00 2001
From: Babu Moger <babu.moger@oracle.com>
Date: Wed, 24 May 2017 17:55:15 -0600
Subject: arch/sparc: Enable queued spinlock support for SPARC
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This patch makes the necessary changes in SPARC architecture to enable
queued spinlock support. Here are some of the earlier discussions about
this feature.
https://lwn.net/Articles/561775/
https://lwn.net/Articles/590243/

Cleaned-up the spinlock_64.h. The definitions of arch_spin_xxx are
replaced by the function in <asm-generic/qspinlock.h>

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/sparc/Kconfig')

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 0e8065207596..78af684f63b9 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -84,6 +84,7 @@ config SPARC64
 	select HAVE_NMI
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select ARCH_USE_QUEUED_RWLOCKS
+	select ARCH_USE_QUEUED_SPINLOCKS
 
 config ARCH_DEFCONFIG
 	string
-- 
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