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Tue, 12 Jan 2021 10:39:40 +0000 From: "misono.tomohiro@fujitsu.com" To: 'Arnd Bergmann' Subject: RE: [PATCH 08/10] soc: fujitsu: hwb: Add release operation Thread-Topic: [PATCH 08/10] soc: fujitsu: hwb: Add release operation Thread-Index: AQHW5aq53SivcjqQTk+g1x5ARmM1bqoduAoAgAYaS6A= Date: Tue, 12 Jan 2021 10:38:25 +0000 Deferred-Delivery: Tue, 12 Jan 2021 10:39:25 +0000 Message-ID: References: <20210108105241.1757799-1-misono.tomohiro@jp.fujitsu.com> <20210108105241.1757799-9-misono.tomohiro@jp.fujitsu.com> In-Reply-To: Accept-Language: ja-JP, en-US Content-Language: ja-JP X-MS-Has-Attach: X-MS-TNEF-Correlator: x-shieldmailcheckermailid: 016281abe04b4bd586251c5efeff77ba x-securitypolicycheck: OK by SHieldMailChecker v2.6.3 authentication-results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=fujitsu.com; x-originating-ip: [218.44.52.179] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 582d5bc2-a6a4-40a5-4170-08d8b6e65d8f x-ms-traffictypediagnostic: OSAPR01MB4692: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:2449; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Message-ID: <20210112103825.AdL32bdzMXb17ywI-f10sxa__2eBI67uu3n6cLOAxAo@z> > On Fri, Jan 8, 2021 at 11:52 AM Misono Tomohiro > wrote: > > > > Upon release, we cleanup remaining resources/registers if necessary. > > This happens when user does not call IOC_BB_FREE properly and the > > function will do effectively the same operation as IOC_BB_FREE. > > > > Signed-off-by: Misono Tomohiro > > What is the benefit of calling IOC_BB_FREE instead of always relying > on close() to do this? Would it be easier to just not implement IOC_BB_FREE? > This is up to applications. When the application want to reuse barrier driver resource with diffent barrier settings (i.e. when changing which PEs joinining synchronization), it can use IOC_BB_FREE rather than close and open device file again. Regards, Tomohiro _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel