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Mon, 30 Sep 2019 23:08:21 +0000 From: Paul Burton To: "linux-mips@vger.kernel.org" CC: Huacai Chen , Jiaxun Yang , "linux-kernel@vger.kernel.org" , Paul Burton Subject: [PATCH 07/37] MIPS: barrier: Clean up __sync() definition Thread-Topic: [PATCH 07/37] MIPS: barrier: Clean up __sync() definition Thread-Index: AQHVd+PzVVIdvKywjkGdJ87RMl/84A== Date: Mon, 30 Sep 2019 23:08:20 +0000 Message-ID: <20190930230806.2940505-8-paul.burton@mips.com> References: <20190930230806.2940505-1-paul.burton@mips.com> In-Reply-To: <20190930230806.2940505-1-paul.burton@mips.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BYAPR21CA0006.namprd21.prod.outlook.com (2603:10b6:a03:114::16) To MWHPR2201MB1277.namprd22.prod.outlook.com (2603:10b6:301:18::12) authentication-results: spf=none (sender IP is ) smtp.mailfrom=pburton@wavecomp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.23.0 x-originating-ip: [12.94.197.246] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0b152cfa-63df-4a53-06be-08d745fb15f6 x-ms-traffictypediagnostic: MWHPR2201MB1709: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5236; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: mips.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0b152cfa-63df-4a53-06be-08d745fb15f6 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Sep 2019 23:08:20.6866 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 463607d3-1db3-40a0-8a29-970c56230104 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: P9HDup82Bq4LPZrO5645n8/mDzOCmNhvsaL54kU+G5XyMDZxUNWKM2UKy+Fe8tbPQAS+RimC3lSqrzJAgPuB8Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR2201MB1709 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement __sync() using the new __SYNC() infrastructure, which will take care of not emitting an instruction for old R3k CPUs that don't support it. The only behavioral difference is that __sync() will now provide a compiler barrier on these old CPUs, but that seems like reasonable behavior anyway. Signed-off-by: Paul Burton --- arch/mips/include/asm/barrier.h | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) diff --git a/arch/mips/include/asm/barrier.h b/arch/mips/include/asm/barrie= r.h index 657ec01120a4..a117c6d95038 100644 --- a/arch/mips/include/asm/barrier.h +++ b/arch/mips/include/asm/barrier.h @@ -11,20 +11,10 @@ #include #include =20 -#ifdef CONFIG_CPU_HAS_SYNC -#define __sync() \ - __asm__ __volatile__( \ - ".set push\n\t" \ - ".set noreorder\n\t" \ - ".set mips2\n\t" \ - "sync\n\t" \ - ".set pop" \ - : /* no output */ \ - : /* no input */ \ - : "memory") -#else -#define __sync() do { } while(0) -#endif +static inline void __sync(void) +{ + asm volatile(__SYNC(full, always) ::: "memory"); +} =20 static inline void rmb(void) { --=20 2.23.0