linux-kernel - [PATCH 02/15] hyperv: Add a function to detect hv

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Date:   Thu,  1 Dec 2016 09:28:39 -0800
From:   kys@...hange.microsoft.com
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
        vkuznets@...hat.com, jasowang@...hat.com,
        leann.ogasawara@...onical.com
Cc:     Haiyang Zhang <haiyangz@...rosoft.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 02/15] hyperv: Add a function to detect hv_device

From: Haiyang Zhang <haiyangz@...rosoft.com>

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 drivers/hv/vmbus_drv.c |    6 ++++++
 include/linux/hyperv.h |    2 ++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 0276d2e..1730ac0 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -692,6 +692,12 @@ struct onmessage_work_context {
 	struct hv_message msg;
 };
 
+bool device_is_hyperv(struct device *dev)
+{
+	return dev->release == vmbus_device_release;
+}
+EXPORT_SYMBOL_GPL(device_is_hyperv);
+
 static void vmbus_onmessage_work(struct work_struct *work)
 {
 	struct onmessage_work_context *ctx;
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 2a52d9a..fdd541c 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -946,6 +946,8 @@ static inline void clear_low_latency_mode(struct vmbus_channel *c)
 	c->low_latency = false;
 }
 
+bool device_is_hyperv(struct device *dev);
+
 void vmbus_onmessage(void *context);
 
 int vmbus_request_offers(void);
-- 
1.7.4.1