From mboxrd@z Thu Jan  1 00:00:00 1970
From: compudj@krystal.dyndns.org (Mathieu Desnoyers)
Date: Sat, 10 Sep 2011 15:23:40 -0400
Subject: [ltt-dev] [URCU PATCH v3 1/2] cmm: let per-arch files
	provide	cmm_smp_* barriers
In-Reply-To: <1315309814-8916-1-git-send-email-pbonzini@redhat.com>
References: <BLU0-SMTP2873B9D52621A937B86083961C0@phx.gbl>
	<1315309814-8916-1-git-send-email-pbonzini@redhat.com>
Message-ID: <BLU0-SMTP46EE5642AB87098E40372D96000@phx.gbl>

* Paolo Bonzini (pbonzini at redhat.com) wrote:
> x86 instructions lfence and sfence are rarely needed, thus we want
> the cmm_smp_rmb/cmm_smp_wmb macros to be simple compiler barriers.
> So, let the per-arch files override the default definitions in
> arch/generic.h.
> 
> Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>

Merged, thanks!

Mathieu

> ---
>  urcu/arch/generic.h |   28 ++++++++++++++++++++++++++++
>  1 files changed, 28 insertions(+), 0 deletions(-)
> 
> diff --git a/urcu/arch/generic.h b/urcu/arch/generic.h
> index 100d3c6..1ea7f59 100644
> --- a/urcu/arch/generic.h
> +++ b/urcu/arch/generic.h
> @@ -100,22 +100,50 @@ extern "C" {
>  #endif
>  
>  #ifdef CONFIG_RCU_SMP
> +#ifndef cmm_smp_mb
>  #define cmm_smp_mb()	cmm_mb()
> +#endif
> +#ifndef cmm_smp_rmb
>  #define cmm_smp_rmb()	cmm_rmb()
> +#endif
> +#ifndef cmm_smp_wmb
>  #define cmm_smp_wmb()	cmm_wmb()
> +#endif
> +#ifndef cmm_smp_mc
>  #define cmm_smp_mc()	cmm_mc()
> +#endif
> +#ifndef cmm_smp_rmc
>  #define cmm_smp_rmc()	cmm_rmc()
> +#endif
> +#ifndef cmm_smp_wmc
>  #define cmm_smp_wmc()	cmm_wmc()
> +#endif
> +#ifndef cmm_smp_read_barrier_depends
>  #define cmm_smp_read_barrier_depends()	cmm_read_barrier_depends()
> +#endif
>  #else
> +#ifndef cmm_smp_mb
>  #define cmm_smp_mb()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_rmb
>  #define cmm_smp_rmb()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_wmb
>  #define cmm_smp_wmb()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_mc
>  #define cmm_smp_mc()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_rmc
>  #define cmm_smp_rmc()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_wmc
>  #define cmm_smp_wmc()	cmm_barrier()
> +#endif
> +#ifndef cmm_smp_read_barrier_depends
>  #define cmm_smp_read_barrier_depends()
>  #endif
> +#endif
>  
>  #ifndef caa_cpu_relax
>  #define caa_cpu_relax()		cmm_barrier()
> -- 
> 1.7.6
> 
> 
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> ltt-dev at lists.casi.polymtl.ca
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> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com