From: Gonglei Subject: [PATCH v2 1/2] virtio: introduce little edian functions for virtio_cread/write# family Date: Tue, 22 Nov 2016 16:10:22 +0800 Message-ID: <1479802223-121104-2-git-send-email-arei.gonglei@huawei.com> References: <1479802223-121104-1-git-send-email-arei.gonglei@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , , , , , , , , , , , Gonglei To: , , , , Return-path: Received: from szxga02-in.huawei.com ([119.145.14.65]:1484 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752101AbcKVILM (ORCPT ); Tue, 22 Nov 2016 03:11:12 -0500 In-Reply-To: <1479802223-121104-1-git-send-email-arei.gonglei@huawei.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: Virtio modern devices are always little edian, let's introduce the LE functions for read/write configuration space for virtio modern devices, which avoid complaint by Sparse when we use the virtio_creaed/virtio_cwrite in VIRTIO_1 devices. Signed-off-by: Gonglei --- include/linux/virtio_config.h | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 26c155b..de05707 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, + unsigned int offset) +{ + __le16 ret; + + vdev->config->get(vdev, offset, &ret, sizeof(ret)); + return ret; +} + +static inline void virtio_cwrite16_le(struct virtio_device *vdev, + unsigned int offset, __le16 val) +{ + vdev->config->set(vdev, offset, &val, sizeof(val)); +} + +static inline __le32 virtio_cread32_le(struct virtio_device *vdev, + unsigned int offset) +{ + __le32 ret; + + vdev->config->get(vdev, offset, &ret, sizeof(ret)); + return ret; +} + +static inline void virtio_cwrite32_le(struct virtio_device *vdev, + unsigned int offset, __le32 val) +{ + vdev->config->set(vdev, offset, &val, sizeof(val)); +} + +static inline __le64 virtio_cread64_le(struct virtio_device *vdev, + unsigned int offset) +{ + __le64 ret; + + __virtio_cread_many(vdev, offset, &ret, 1, sizeof(ret)); + return ret; +} + +static inline void virtio_cwrite64_le(struct virtio_device *vdev, + unsigned int offset, __le64 val) +{ + vdev->config->set(vdev, offset, &val, sizeof(val)); +} + #endif /* _LINUX_VIRTIO_CONFIG_H */ -- 1.8.3.1