Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC

From: Babu Moger
Date: Fri May 19 2017 - 12:37:07 EST



On 5/18/2017 9:31 PM, David Miller wrote:
From: Babu Moger <babu.moger@xxxxxxxxxx>
Date: Thu, 18 May 2017 18:36:08 -0600

@@ -82,6 +82,7 @@ config SPARC64
select HAVE_ARCH_AUDITSYSCALL
select ARCH_SUPPORTS_ATOMIC_RMW
select HAVE_NMI
+ select ARCH_USE_QUEUED_RWLOCKS
If you are selecting this on SPARC64 all the time, then:

@@ -94,6 +94,7 @@ static inline void arch_spin_lock_flags(arch_spinlock_t *lock, unsigned long fla
: "memory");
}
+#ifndef CONFIG_QUEUED_RWLOCKS
/* Multi-reader locks, these are much saner than the 32-bit Sparc ones... */
You can remove this segment of ifdef'd code altogether since it is in
a sparc64 specific header file.

Sure. will do.