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Tue, 20 Aug 2019 01:52:03 +0000 From: Dexuan Cui To: "linux-hyperv@vger.kernel.org" , "gregkh@linuxfoundation.org" , Stephen Hemminger , Sasha Levin , "sashal@kernel.org" , Haiyang Zhang , KY Srinivasan , Michael Kelley , "tglx@linutronix.de" CC: "linux-kernel@vger.kernel.org" , Dexuan Cui Subject: [PATCH v3 06/12] Drivers: hv: vmbus: Add a helper function is_sub_channel() Thread-Topic: [PATCH v3 06/12] Drivers: hv: vmbus: Add a helper function is_sub_channel() Thread-Index: AQHVVvncakvN3Q3Ji0SHQLvfbh196w== Date: Tue, 20 Aug 2019 01:52:03 +0000 Message-ID: <1566265863-21252-7-git-send-email-decui@microsoft.com> References: <1566265863-21252-1-git-send-email-decui@microsoft.com> In-Reply-To: <1566265863-21252-1-git-send-email-decui@microsoft.com> Reply-To: Dexuan Cui Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR21CA0056.namprd21.prod.outlook.com (2603:10b6:300:db::18) To SN6PR2101MB0942.namprd21.prod.outlook.com (2603:10b6:805:4::19) authentication-results: spf=none (sender IP is ) smtp.mailfrom=decui@microsoft.com; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ZFAt4zXmB93Wpt9+RQ1OypfskZS0oUIZ08lxOWGtDX6ck1AuTJW1WVdGQQJlCzzJtvkKV/gGK8UYk7lkha/hRwMDAvoQM8I0itOjbtTUZLsGA0/arUX3wqqcxFdT4bfJdIOdmw2L9jwKV7hZYq+Zh7x8FQ5VeKz5fSbuEdGIcNqM3AXtprZH/Q0m5b4dPfRxssgw8M87S/31JLSoON73zAlRfwYlnmlMZ3bqIMJ8gChdGQ7y+gQcaMhGb5A14EkSV9K426EoRjtveag0JbZ3BEUsjp2c7p4bYUjAyDDCoNdUveq2up6U2vpPZxk2LQRCNyNzmPaOw7GJCDrObuZ7LNz1138OoGeMQaQrmWyvsoNxg7QgMO0EHT7Pj7jgg1dPGaqHHZ7d+Y7EH/cB6FnFwZyGskXM82KFBgJQAQOQYNg= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 66ff192a-d63b-4faf-ab1a-08d72510ff4e X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Aug 2019 01:52:03.1500 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: nIcpLg8QGsLlCiCxiaWmk9nR8VKmvcAdIotYGaiuKElvWKqxOfVbauYeti7FNwaUDXs2UXOaZ4QmGcLs0fvf0Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR2101MB1133 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org The existing method of telling if a channel is sub-channel in vmbus_process_offer() is cumbersome. This new simple helper function is preferred in future. Signed-off-by: Dexuan Cui --- include/linux/hyperv.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 6256cc3..2d39248 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -245,7 +245,10 @@ struct vmbus_channel_offer { } pipe; } u; /* - * The sub_channel_index is defined in win8. + * The sub_channel_index is defined in Win8: a value of zero means a + * primary channel and a value of non-zero means a sub-channel. + * + * Before Win8, the field is reserved, meaning it's always zero. */ u16 sub_channel_index; u16 reserved3; @@ -934,6 +937,11 @@ static inline bool is_hvsock_channel(const struct vmbu= s_channel *c) VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); } =20 +static inline bool is_sub_channel(const struct vmbus_channel *c) +{ + return c->offermsg.offer.sub_channel_index !=3D 0; +} + static inline void set_channel_affinity_state(struct vmbus_channel *c, enum hv_numa_policy policy) { --=20 1.8.3.1