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Mon, 11 Nov 2019 21:17:58 -0800 (PST) X-Gm-Message-State: APjAAAVh1i+JZORCqXE7TO3/asyb9tyNiJgHPCxxCyEA2L6YF/tge3l3 LR/5etGjUi1psEtDyIVWbIA8hTLMk6ev/+9LDOY= X-Google-Smtp-Source: APXvYqyRMq8MPHBbv10LcomZfNYFYesotjA4C4S3ZUC/cErDRyyFxBF01/9DX6UFwCBG6keYQ/6e7NX4CI4hPzjyXJo= X-Received: by 2002:ad4:462d:: with SMTP id x13mr7948364qvv.105.1573535877525; Mon, 11 Nov 2019 21:17:57 -0800 (PST) MIME-Version: 1.0 References: <20191108130123.6839-1-linux@rasmusvillemoes.dk> <20191108130123.6839-5-linux@rasmusvillemoes.dk> In-Reply-To: <20191108130123.6839-5-linux@rasmusvillemoes.dk> From: Timur Tabi Date: Mon, 11 Nov 2019 23:17:19 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read, write}* wrappers To: Rasmus Villemoes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191111_211802_330090_736BCB14 X-CRM114-Status: GOOD ( 10.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christophe Leroy , lkml , Li Yang , Scott Wood , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel , Qiang Zhao Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Nov 8, 2019 at 7:03 AM Rasmus Villemoes wrote: > > The QUICC engine drivers use the powerpc-specific out_be32() etc. In > order to allow those drivers to build for other architectures, those > must be replaced by iowrite32be(). However, on powerpc, out_be32() is > a simple inline function while iowrite32be() is out-of-line. So in > order not to introduce a performance regression on powerpc when making > the drivers work on other architectures, introduce qe_io* helpers. Isn't it also true that iowrite32be() assumes a little-endian platform and always does a byte swap? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel