linux-kernel - Re: [PATCH V2] scsi: mpt3sas: remove redundant wmb

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Message-ID: <yq1d1c1h1x2.fsf@oracle.com>
Date:   Mon, 24 Apr 2017 18:32:41 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Sinan Kaya <okaya@...eaurora.org>
Cc:     linux-scsi@...r.kernel.org, timur@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sathya Prakash <sathya.prakash@...adcom.com>,
        Chaitra P B <chaitra.basappa@...adcom.com>,
        Suganath Prabu Subramani 
        <suganath-prabu.subramani@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        MPT-FusionLinux.pdl@...adcom.com (open list:LSILOGIC MPT FUSION DRIVERS
        (FC/SAS/SPI)), linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH V2] scsi: mpt3sas: remove redundant wmb


Sinan,

> Due to relaxed ordering requirements on multiple architectures,
> drivers are required to use wmb/rmb/mb combinations when they need to
> guarantee observability between the memory and the HW.

Applied to 4.12/scsi-queue, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering