From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: julien.grall@citrix.com, stefano.stabellini@eu.citrix.com,
tim@xen.org, xen-devel@lists.xen.org
Subject: Re: [PATCH 07/10] xen: arm: Use dmb for smp barriers
Date: Mon, 1 Jul 2013 16:20:54 +0100 [thread overview]
Message-ID: <alpine.DEB.2.02.1307011620400.4525@kaball.uk.xensource.com> (raw)
In-Reply-To: <1372435856-14040-7-git-send-email-ian.campbell@citrix.com>
On Fri, 28 Jun 2013, Ian Campbell wrote:
> The full power of dsb is not required in this context.
>
> Also change wmb() to be dsb() directly instead of indirectly via mb(), for
> clarity.
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> xen/include/asm-arm/system.h | 8 ++++----
> 1 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
> index e003624..89c61ef 100644
> --- a/xen/include/asm-arm/system.h
> +++ b/xen/include/asm-arm/system.h
> @@ -18,11 +18,11 @@
>
> #define mb() dsb()
> #define rmb() dsb()
> -#define wmb() mb()
> +#define wmb() dsb()
>
> -#define smp_mb() mb()
> -#define smp_rmb() rmb()
> -#define smp_wmb() wmb()
> +#define smp_mb() dmb()
> +#define smp_rmb() dmb()
> +#define smp_wmb() dmb()
>
> #define xchg(ptr,x) \
> ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
> --
> 1.7.2.5
>
next prev parent reply other threads:[~2013-07-01 15:20 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 16:10 [PATCH 00/10] xen: arm: map normal memory as inner shareable, reduce scope of various barriers Ian Campbell
2013-06-28 16:10 ` [PATCH 01/10] xen: arm: map memory as inner shareable Ian Campbell
2013-07-01 15:39 ` Stefano Stabellini
2013-07-01 15:42 ` Ian Campbell
2013-07-02 14:09 ` Leif Lindholm
2013-07-02 14:26 ` Ian Campbell
2013-07-04 10:58 ` Tim Deegan
2013-07-04 11:03 ` Ian Campbell
2013-06-28 16:10 ` [PATCH 02/10] xen: arm: Only upgrade guest barriers to " Ian Campbell
2013-07-01 15:24 ` Stefano Stabellini
2013-07-04 10:58 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 03/10] xen: arm: reduce instruction cache and tlb flushes to inner-shareable Ian Campbell
2013-07-01 15:25 ` Stefano Stabellini
2013-07-04 11:07 ` Tim Deegan
2013-07-04 11:19 ` Tim Deegan
2013-07-04 11:21 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 04/10] xen: arm: consolidate barrier definitions Ian Campbell
2013-07-01 15:25 ` Stefano Stabellini
2013-07-04 11:07 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 05/10] xen: use SMP barrier in common code dealing with shared memory protocols Ian Campbell
2013-06-28 16:15 ` Ian Campbell
2013-06-28 16:20 ` Keir Fraser
2013-07-04 11:26 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 06/10] xen: arm: Use SMP barriers when that is all which is required Ian Campbell
2013-07-01 15:19 ` Stefano Stabellini
2013-07-01 15:24 ` Ian Campbell
2013-07-04 11:30 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 07/10] xen: arm: Use dmb for smp barriers Ian Campbell
2013-07-01 15:20 ` Stefano Stabellini [this message]
2013-07-04 11:31 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 08/10] xen: arm: add scope to dsb and dmb macros Ian Campbell
2013-07-01 15:21 ` Stefano Stabellini
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:44 ` (no subject) Tim Deegan
2013-06-28 16:10 ` [PATCH 09/10] xen: arm: weaken SMP barriers to inner shareable Ian Campbell
2013-07-01 15:21 ` Stefano Stabellini
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:35 ` Tim Deegan
2013-06-28 16:10 ` [PATCH 10/10] xen: arm: use more specific barriers for read and write barriers Ian Campbell
2013-07-01 15:22 ` Stefano Stabellini
2013-07-04 11:42 ` Tim Deegan
2013-07-04 11:46 ` Ian Campbell
2013-06-28 16:11 ` [PATCH 00/10] xen: arm: map normal memory as inner shareable, reduce scope of various barriers Ian Campbell
2013-07-04 11:32 (no subject) Tim Deegan
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