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

From David Miller <davem@davemloft.net>
Newsgroups linux.kernel
Subject Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC
Date 2017-05-19 04:40 +0200
Message-ID <tIFZD-3UM-3@gated-at.bofh.it> (permalink)
References <tIE7v-2zo-3@gated-at.bofh.it> <tIE7w-2zo-15@gated-at.bofh.it>
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From: Babu Moger <babu.moger@oracle.com>
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.

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Thread

[PATCH 0/6] Enable queued rwlock and queued spinlock for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
  [PATCH 3/6] arch/sparc: Introduce cmpxchg_u8 SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
  [PATCH 6/6] arch/sparc: Enable queued spinlock support for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
    Re: [PATCH 6/6] arch/sparc: Enable queued spinlock support for  SPARC David Miller <davem@davemloft.net> - 2017-05-19 04:40 +0200
      Re: [PATCH 6/6] arch/sparc: Enable queued spinlock support for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 18:40 +0200
  [PATCH 2/6] arch/sparc: Define config parameter CPU_BIG_ENDIAN Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
    Re: [PATCH 2/6] arch/sparc: Define config parameter CPU_BIG_ENDIAN David Miller <davem@davemloft.net> - 2017-05-19 04:30 +0200
      Re: [PATCH 2/6] arch/sparc: Define config parameter CPU_BIG_ENDIAN Babu Moger <babu.moger@oracle.com> - 2017-05-19 18:30 +0200
  [PATCH 1/6] kernel/locking: Fix compile error with qrwlock.c Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
    Re: [PATCH 1/6] kernel/locking: Fix compile error with qrwlock.c David Miller <davem@davemloft.net> - 2017-05-19 04:30 +0200
      Re: [PATCH 1/6] kernel/locking: Fix compile error with qrwlock.c Babu Moger <babu.moger@oracle.com> - 2017-05-19 18:40 +0200
  [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 02:40 +0200
    Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC David Miller <davem@davemloft.net> - 2017-05-19 04:40 +0200
      Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC Peter Zijlstra <peterz@infradead.org> - 2017-05-19 11:10 +0200
        Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 18:50 +0200
        Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC David Miller <davem@davemloft.net> - 2017-05-19 21:20 +0200
          Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC Peter Zijlstra <peterz@infradead.org> - 2017-05-19 21:40 +0200
            Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC David Miller <davem@davemloft.net> - 2017-05-19 21:40 +0200
      Re: [PATCH 4/6] arch/sparc: Enable queued rwlocks for SPARC Babu Moger <babu.moger@oracle.com> - 2017-05-19 18:40 +0200

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