On Mon, Sep 14, 2020 at 01:28:06PM +0000, Mauro Carvalho Chehab wrote:
> This is an automatic generated email to let you know that the following patch were queued:
did you intend to get this into Linus tree before 5.9? I just checked
and didn't see it in mainline yet.
>
> Subject: media: media/v4l2: remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag
> Author: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
> Date: Fri Sep 11 05:07:58 2020 +0200
>
> The patch partially reverts some of the UAPI bits of the buffer
> cache management hints. Namely, the queue consistency (memory
> coherency) user-space hint because, as it turned out, the kernel
> implementation of this feature was misusing DMA_ATTR_NON_CONSISTENT.
>
> The patch reverts both kernel and user space parts: removes the
> DMA consistency attr functions, rolls back changes to v4l2_requestbuffers,
> v4l2_create_buffers structures and corresponding UAPI functions
> (plus compat32 layer) and cleans up the documentation.
>
> [hverkuil: fixed a few typos in the commit log]
> [hverkuil: fixed vb2_core_reqbufs call in drivers/media/dvb-core/dvb_vb2.c]
> [mchehab: fixed a typo in the commit log: revers->reverts]
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
>
> Documentation/userspace-api/media/v4l/buffer.rst | 17 --------
> .../userspace-api/media/v4l/vidioc-create-bufs.rst | 6 +--
> .../userspace-api/media/v4l/vidioc-reqbufs.rst | 12 +-----
> drivers/media/common/videobuf2/videobuf2-core.c | 46 +++-------------------
> .../media/common/videobuf2/videobuf2-dma-contig.c | 19 ---------
> drivers/media/common/videobuf2/videobuf2-dma-sg.c | 3 +-
> drivers/media/common/videobuf2/videobuf2-v4l2.c | 18 +--------
> drivers/media/dvb-core/dvb_vb2.c | 2 +-
> drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 10 +----
> drivers/media/v4l2-core/v4l2-ioctl.c | 5 ++-
> include/media/videobuf2-core.h | 7 +---
> include/uapi/linux/videodev2.h | 13 +-----
> 12 files changed, 23 insertions(+), 135 deletions(-)
>
> ---
>
> diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst
> index 57e752aaf414..2044ed13cd9d 100644
> --- a/Documentation/userspace-api/media/v4l/buffer.rst
> +++ b/Documentation/userspace-api/media/v4l/buffer.rst
> @@ -701,23 +701,6 @@ Memory Consistency Flags
> :stub-columns: 0
> :widths: 3 1 4
>
> - * .. _`V4L2-FLAG-MEMORY-NON-CONSISTENT`:
> -
> - - ``V4L2_FLAG_MEMORY_NON_CONSISTENT``
> - - 0x00000001
> - - A buffer is allocated either in consistent (it will be automatically
> - coherent between the CPU and the bus) or non-consistent memory. The
> - latter can provide performance gains, for instance the CPU cache
> - sync/flush operations can be avoided if the buffer is accessed by the
> - corresponding device only and the CPU does not read/write to/from that
> - buffer. However, this requires extra care from the driver -- it must
> - guarantee memory consistency by issuing a cache flush/sync when
> - consistency is needed. If this flag is set V4L2 will attempt to
> - allocate the buffer in non-consistent memory. The flag takes effect
> - only if the buffer is used for :ref:`memory mapping <mmap>` I/O and the
> - queue reports the :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS
> - <V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability.
> -
> .. c:type:: v4l2_memory
>
> enum v4l2_memory
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst
> index f2a702870fad..12cf6b44f414 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst
> @@ -120,13 +120,9 @@ than the number requested.
> If you want to just query the capabilities without making any
> other changes, then set ``count`` to 0, ``memory`` to
> ``V4L2_MEMORY_MMAP`` and ``format.type`` to the buffer type.
> - * - __u32
> - - ``flags``
> - - Specifies additional buffer management attributes.
> - See :ref:`memory-flags`.
>
> * - __u32
> - - ``reserved``\ [6]
> + - ``reserved``\ [7]
> - A place holder for future extensions. Drivers and applications
> must set the array to zero.
>
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
> index 75d894d9c36c..0e3e2fde65e8 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
> @@ -112,17 +112,10 @@ aborting or finishing any DMA in progress, an implicit
> ``V4L2_MEMORY_MMAP`` and ``type`` set to the buffer type. This will
> free any previously allocated buffers, so this is typically something
> that will be done at the start of the application.
> - * - union {
> - - (anonymous)
> - * - __u32
> - - ``flags``
> - - Specifies additional buffer management attributes.
> - See :ref:`memory-flags`.
> * - __u32
> - ``reserved``\ [1]
> - - Kept for backwards compatibility. Use ``flags`` instead.
> - * - }
> - -
> + - A place holder for future extensions. Drivers and applications
> + must set the array to zero.
>
> .. tabularcolumns:: |p{6.1cm}|p{2.2cm}|p{8.7cm}|
>
> @@ -169,7 +162,6 @@ aborting or finishing any DMA in progress, an implicit
> - This capability is set by the driver to indicate that the queue supports
> cache and memory management hints. However, it's only valid when the
> queue is used for :ref:`memory mapping <mmap>` streaming I/O. See
> - :ref:`V4L2_FLAG_MEMORY_NON_CONSISTENT <V4L2-FLAG-MEMORY-NON-CONSISTENT>`,
> :ref:`V4L2_BUF_FLAG_NO_CACHE_INVALIDATE <V4L2-BUF-FLAG-NO-CACHE-INVALIDATE>` and
> :ref:`V4L2_BUF_FLAG_NO_CACHE_CLEAN <V4L2-BUF-FLAG-NO-CACHE-CLEAN>`.
>
> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
> index f544d3393e9d..4eab6d81cce1 100644
> --- a/drivers/media/common/videobuf2/videobuf2-core.c
> +++ b/drivers/media/common/videobuf2/videobuf2-core.c
> @@ -721,39 +721,14 @@ int vb2_verify_memory_type(struct vb2_queue *q,
> }
> EXPORT_SYMBOL(vb2_verify_memory_type);
>
> -static void set_queue_consistency(struct vb2_queue *q, bool consistent_mem)
> -{
> - q->dma_attrs &= ~DMA_ATTR_NON_CONSISTENT;
> -
> - if (!vb2_queue_allows_cache_hints(q))
> - return;
> - if (!consistent_mem)
> - q->dma_attrs |= DMA_ATTR_NON_CONSISTENT;
> -}
> -
> -static bool verify_consistency_attr(struct vb2_queue *q, bool consistent_mem)
> -{
> - bool queue_is_consistent = !(q->dma_attrs & DMA_ATTR_NON_CONSISTENT);
> -
> - if (consistent_mem != queue_is_consistent) {
> - dprintk(q, 1, "memory consistency model mismatch\n");
> - return false;
> - }
> - return true;
> -}
> -
> int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> - unsigned int flags, unsigned int *count)
> + unsigned int *count)
> {
> unsigned int num_buffers, allocated_buffers, num_planes = 0;
> unsigned plane_sizes[VB2_MAX_PLANES] = { };
> - bool consistent_mem = true;
> unsigned int i;
> int ret;
>
> - if (flags & V4L2_FLAG_MEMORY_NON_CONSISTENT)
> - consistent_mem = false;
> -
> if (q->streaming) {
> dprintk(q, 1, "streaming active\n");
> return -EBUSY;
> @@ -765,8 +740,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> }
>
> if (*count == 0 || q->num_buffers != 0 ||
> - (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory) ||
> - !verify_consistency_attr(q, consistent_mem)) {
> + (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory)) {
> /*
> * We already have buffers allocated, so first check if they
> * are not in use and can be freed.
> @@ -803,7 +777,6 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME);
> memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
> q->memory = memory;
> - set_queue_consistency(q, consistent_mem);
>
> /*
> * Ask the driver how many buffers and planes per buffer it requires.
> @@ -888,18 +861,14 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> EXPORT_SYMBOL_GPL(vb2_core_reqbufs);
>
> int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
> - unsigned int flags, unsigned int *count,
> + unsigned int *count,
> unsigned int requested_planes,
> const unsigned int requested_sizes[])
> {
> unsigned int num_planes = 0, num_buffers, allocated_buffers;
> unsigned plane_sizes[VB2_MAX_PLANES] = { };
> - bool consistent_mem = true;
> int ret;
>
> - if (flags & V4L2_FLAG_MEMORY_NON_CONSISTENT)
> - consistent_mem = false;
> -
> if (q->num_buffers == VB2_MAX_FRAME) {
> dprintk(q, 1, "maximum number of buffers already allocated\n");
> return -ENOBUFS;
> @@ -912,15 +881,12 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
> }
> memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
> q->memory = memory;
> - set_queue_consistency(q, consistent_mem);
> q->waiting_for_buffers = !q->is_output;
> } else {
> if (q->memory != memory) {
> dprintk(q, 1, "memory model mismatch\n");
> return -EINVAL;
> }
> - if (!verify_consistency_attr(q, consistent_mem))
> - return -EINVAL;
> }
>
> num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers);
> @@ -2581,7 +2547,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
> fileio->memory = VB2_MEMORY_MMAP;
> fileio->type = q->type;
> q->fileio = fileio;
> - ret = vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
> + ret = vb2_core_reqbufs(q, fileio->memory, &fileio->count);
> if (ret)
> goto err_kfree;
>
> @@ -2638,7 +2604,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
>
> err_reqbufs:
> fileio->count = 0;
> - vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
> + vb2_core_reqbufs(q, fileio->memory, &fileio->count);
>
> err_kfree:
> q->fileio = NULL;
> @@ -2658,7 +2624,7 @@ static int __vb2_cleanup_fileio(struct vb2_queue *q)
> vb2_core_streamoff(q, q->type);
> q->fileio = NULL;
> fileio->count = 0;
> - vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
> + vb2_core_reqbufs(q, fileio->memory, &fileio->count);
> kfree(fileio);
> dprintk(q, 3, "file io emulator closed\n");
> }
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> index ec3446cc45b8..7b1b86ec942d 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> @@ -42,11 +42,6 @@ struct vb2_dc_buf {
> struct dma_buf_attachment *db_attach;
> };
>
> -static inline bool vb2_dc_buffer_consistent(unsigned long attr)
> -{
> - return !(attr & DMA_ATTR_NON_CONSISTENT);
> -}
> -
> /*********************************************/
> /* scatterlist table functions */
> /*********************************************/
> @@ -341,13 +336,6 @@ static int
> vb2_dc_dmabuf_ops_begin_cpu_access(struct dma_buf *dbuf,
> enum dma_data_direction direction)
> {
> - struct vb2_dc_buf *buf = dbuf->priv;
> - struct sg_table *sgt = buf->dma_sgt;
> -
> - if (vb2_dc_buffer_consistent(buf->attrs))
> - return 0;
> -
> - dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
> return 0;
> }
>
> @@ -355,13 +343,6 @@ static int
> vb2_dc_dmabuf_ops_end_cpu_access(struct dma_buf *dbuf,
> enum dma_data_direction direction)
> {
> - struct vb2_dc_buf *buf = dbuf->priv;
> - struct sg_table *sgt = buf->dma_sgt;
> -
> - if (vb2_dc_buffer_consistent(buf->attrs))
> - return 0;
> -
> - dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
> return 0;
> }
>
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> index 0a40e00f0d7e..a86fce5d8ea8 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> @@ -123,8 +123,7 @@ static void *vb2_dma_sg_alloc(struct device *dev, unsigned long dma_attrs,
> /*
> * NOTE: dma-sg allocates memory using the page allocator directly, so
> * there is no memory consistency guarantee, hence dma-sg ignores DMA
> - * attributes passed from the upper layer. That means that
> - * V4L2_FLAG_MEMORY_NON_CONSISTENT has no effect on dma-sg buffers.
> + * attributes passed from the upper layer.
> */
> buf->pages = kvmalloc_array(buf->num_pages, sizeof(struct page *),
> GFP_KERNEL | __GFP_ZERO);
> diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> index 30caad27281e..cfe197df970d 100644
> --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
> +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> @@ -722,22 +722,12 @@ static void fill_buf_caps(struct vb2_queue *q, u32 *caps)
> #endif
> }
>
> -static void clear_consistency_attr(struct vb2_queue *q,
> - int memory,
> - unsigned int *flags)
> -{
> - if (!q->allow_cache_hints || memory != V4L2_MEMORY_MMAP)
> - *flags &= ~V4L2_FLAG_MEMORY_NON_CONSISTENT;
> -}
> -
> int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
> {
> int ret = vb2_verify_memory_type(q, req->memory, req->type);
>
> fill_buf_caps(q, &req->capabilities);
> - clear_consistency_attr(q, req->memory, &req->flags);
> - return ret ? ret : vb2_core_reqbufs(q, req->memory,
> - req->flags, &req->count);
> + return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count);
> }
> EXPORT_SYMBOL_GPL(vb2_reqbufs);
>
> @@ -769,7 +759,6 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
> unsigned i;
>
> fill_buf_caps(q, &create->capabilities);
> - clear_consistency_attr(q, create->memory, &create->flags);
> create->index = q->num_buffers;
> if (create->count == 0)
> return ret != -EBUSY ? ret : 0;
> @@ -813,7 +802,6 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
> if (requested_sizes[i] == 0)
> return -EINVAL;
> return ret ? ret : vb2_core_create_bufs(q, create->memory,
> - create->flags,
> &create->count,
> requested_planes,
> requested_sizes);
> @@ -998,12 +986,11 @@ int vb2_ioctl_reqbufs(struct file *file, void *priv,
> int res = vb2_verify_memory_type(vdev->queue, p->memory, p->type);
>
> fill_buf_caps(vdev->queue, &p->capabilities);
> - clear_consistency_attr(vdev->queue, p->memory, &p->flags);
> if (res)
> return res;
> if (vb2_queue_is_busy(vdev, file))
> return -EBUSY;
> - res = vb2_core_reqbufs(vdev->queue, p->memory, p->flags, &p->count);
> + res = vb2_core_reqbufs(vdev->queue, p->memory, &p->count);
> /* If count == 0, then the owner has released all buffers and he
> is no longer owner of the queue. Otherwise we have a new owner. */
> if (res == 0)
> @@ -1021,7 +1008,6 @@ int vb2_ioctl_create_bufs(struct file *file, void *priv,
>
> p->index = vdev->queue->num_buffers;
> fill_buf_caps(vdev->queue, &p->capabilities);
> - clear_consistency_attr(vdev->queue, p->memory, &p->flags);
> /*
> * If count == 0, then just check if memory and type are valid.
> * Any -EBUSY result from vb2_verify_memory_type can be mapped to 0.
> diff --git a/drivers/media/dvb-core/dvb_vb2.c b/drivers/media/dvb-core/dvb_vb2.c
> index 959d110407a4..6974f1731529 100644
> --- a/drivers/media/dvb-core/dvb_vb2.c
> +++ b/drivers/media/dvb-core/dvb_vb2.c
> @@ -342,7 +342,7 @@ int dvb_vb2_reqbufs(struct dvb_vb2_ctx *ctx, struct dmx_requestbuffers *req)
>
> ctx->buf_siz = req->size;
> ctx->buf_cnt = req->count;
> - ret = vb2_core_reqbufs(&ctx->vb_q, VB2_MEMORY_MMAP, 0, &req->count);
> + ret = vb2_core_reqbufs(&ctx->vb_q, VB2_MEMORY_MMAP, &req->count);
> if (ret) {
> ctx->state = DVB_VB2_STATE_NONE;
> dprintk(1, "[%s] count=%d size=%d errno=%d\n", ctx->name,
> diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> index 593bcf6c3735..a99e82ec9ab6 100644
> --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
> @@ -246,9 +246,6 @@ struct v4l2_format32 {
> * @memory: buffer memory type
> * @format: frame format, for which buffers are requested
> * @capabilities: capabilities of this buffer type.
> - * @flags: additional buffer management attributes (ignored unless the
> - * queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability and
> - * configured for MMAP streaming I/O).
> * @reserved: future extensions
> */
> struct v4l2_create_buffers32 {
> @@ -257,8 +254,7 @@ struct v4l2_create_buffers32 {
> __u32 memory; /* enum v4l2_memory */
> struct v4l2_format32 format;
> __u32 capabilities;
> - __u32 flags;
> - __u32 reserved[6];
> + __u32 reserved[7];
> };
>
> static int __bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size)
> @@ -359,8 +355,7 @@ static int get_v4l2_create32(struct v4l2_create_buffers __user *p64,
> {
> if (!access_ok(p32, sizeof(*p32)) ||
> copy_in_user(p64, p32,
> - offsetof(struct v4l2_create_buffers32, format)) ||
> - assign_in_user(&p64->flags, &p32->flags))
> + offsetof(struct v4l2_create_buffers32, format)))
> return -EFAULT;
> return __get_v4l2_format32(&p64->format, &p32->format,
> aux_buf, aux_space);
> @@ -422,7 +417,6 @@ static int put_v4l2_create32(struct v4l2_create_buffers __user *p64,
> copy_in_user(p32, p64,
> offsetof(struct v4l2_create_buffers32, format)) ||
> assign_in_user(&p32->capabilities, &p64->capabilities) ||
> - assign_in_user(&p32->flags, &p64->flags) ||
> copy_in_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
> return -EFAULT;
> return __put_v4l2_format32(&p64->format, &p32->format);
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index e3a25ea913ac..ccf947632a3b 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -2044,6 +2044,9 @@ static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
>
> if (ret)
> return ret;
> +
> + CLEAR_AFTER_FIELD(p, capabilities);
> +
> return ops->vidioc_reqbufs(file, fh, p);
> }
>
> @@ -2083,7 +2086,7 @@ static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
> if (ret)
> return ret;
>
> - CLEAR_AFTER_FIELD(create, flags);
> + CLEAR_AFTER_FIELD(create, capabilities);
>
> v4l_sanitize_format(&create->format);
>
> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
> index 52ef92049073..bbb3f26fbde9 100644
> --- a/include/media/videobuf2-core.h
> +++ b/include/media/videobuf2-core.h
> @@ -744,8 +744,6 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb);
> * vb2_core_reqbufs() - Initiate streaming.
> * @q: pointer to &struct vb2_queue with videobuf2 queue.
> * @memory: memory type, as defined by &enum vb2_memory.
> - * @flags: auxiliary queue/buffer management flags. Currently, the only
> - * used flag is %V4L2_FLAG_MEMORY_NON_CONSISTENT.
> * @count: requested buffer count.
> *
> * Videobuf2 core helper to implement VIDIOC_REQBUF() operation. It is called
> @@ -770,13 +768,12 @@ void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb);
> * Return: returns zero on success; an error code otherwise.
> */
> int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> - unsigned int flags, unsigned int *count);
> + unsigned int *count);
>
> /**
> * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs
> * @q: pointer to &struct vb2_queue with videobuf2 queue.
> * @memory: memory type, as defined by &enum vb2_memory.
> - * @flags: auxiliary queue/buffer management flags.
> * @count: requested buffer count.
> * @requested_planes: number of planes requested.
> * @requested_sizes: array with the size of the planes.
> @@ -794,7 +791,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
> * Return: returns zero on success; an error code otherwise.
> */
> int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
> - unsigned int flags, unsigned int *count,
> + unsigned int *count,
> unsigned int requested_planes,
> const unsigned int requested_sizes[]);
>
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index c7b70ff53bc1..235db7754606 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -191,8 +191,6 @@ enum v4l2_memory {
> V4L2_MEMORY_DMABUF = 4,
> };
>
> -#define V4L2_FLAG_MEMORY_NON_CONSISTENT (1 << 0)
> -
> /* see also http://vektor.theorem.ca/graphics/ycbcr/ */
> enum v4l2_colorspace {
> /*
> @@ -949,10 +947,7 @@ struct v4l2_requestbuffers {
> __u32 type; /* enum v4l2_buf_type */
> __u32 memory; /* enum v4l2_memory */
> __u32 capabilities;
> - union {
> - __u32 flags;
> - __u32 reserved[1];
> - };
> + __u32 reserved[1];
> };
>
> /* capabilities for struct v4l2_requestbuffers and v4l2_create_buffers */
> @@ -2456,9 +2451,6 @@ struct v4l2_dbg_chip_info {
> * @memory: enum v4l2_memory; buffer memory type
> * @format: frame format, for which buffers are requested
> * @capabilities: capabilities of this buffer type.
> - * @flags: additional buffer management attributes (ignored unless the
> - * queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability
> - * and configured for MMAP streaming I/O).
> * @reserved: future extensions
> */
> struct v4l2_create_buffers {
> @@ -2467,8 +2459,7 @@ struct v4l2_create_buffers {
> __u32 memory;
> struct v4l2_format format;
> __u32 capabilities;
> - __u32 flags;
> - __u32 reserved[6];
> + __u32 reserved[7];
> };
>
> /*
---end quoted text---
