dma-buf: Add syntax highlighting to code listings in the document

This patch tries to improve the display of the code listing
on The Linux Kernel documentation website for dma-buf [1] .

Originally, it appears that it was attempting to escape
the '*' character, but looks like it's not necessary (now),
so we are seeing something like '\*' on the webite.

This patch removes these unnecessary backslashes and adds syntax
highlighting to improve the readability of the code listing.

[1] https://docs.kernel.org/driver-api/dma-buf.html

Signed-off-by: Tommy Chiang <ototot@chromium.org>
---
 drivers/dma-buf/dma-buf.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

On Thu, Jan 18, 2024 at 7:33 PM Tommy Chiang <ototot@chromium.org> wrote:
>
> This patch tries to improve the display of the code listing
> on The Linux Kernel documentation website for dma-buf [1] .
>
> Originally, it appears that it was attempting to escape
> the '*' character, but looks like it's not necessary (now),
> so we are seeing something like '\*' on the webite.
>
> This patch removes these unnecessary backslashes and adds syntax
> highlighting to improve the readability of the code listing.
>
> [1] https://docs.kernel.org/driver-api/dma-buf.html
>
> Signed-off-by: Tommy Chiang <ototot@chromium.org>
> ---
>  drivers/dma-buf/dma-buf.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> index 8fe5aa67b167..e083a0ab06d7 100644
> --- a/drivers/dma-buf/dma-buf.c
> +++ b/drivers/dma-buf/dma-buf.c
> @@ -1282,10 +1282,12 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_move_notify, DMA_BUF);
>   *   vmap interface is introduced. Note that on very old 32-bit architectures
>   *   vmalloc space might be limited and result in vmap calls failing.
>   *
> - *   Interfaces::
> + *   Interfaces:
>   *
> - *      void \*dma_buf_vmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
> - *      void dma_buf_vunmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
> + *   .. code-block:: c
> + *
> + *     void *dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
> + *     void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   *
>   *   The vmap call can fail if there is no vmap support in the exporter, or if
>   *   it runs out of vmalloc space. Note that the dma-buf layer keeps a reference
> @@ -1342,10 +1344,11 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_move_notify, DMA_BUF);
>   *   enough, since adding interfaces to intercept pagefaults and allow pte
>   *   shootdowns would increase the complexity quite a bit.
>   *
> - *   Interface::
> + *   Interface:
> + *
> + *   .. code-block:: c
>   *
> - *      int dma_buf_mmap(struct dma_buf \*, struct vm_area_struct \*,
> - *                    unsigned long);
> + *     int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, unsigned long);
>   *
>   *   If the importing subsystem simply provides a special-purpose mmap call to
>   *   set up a mapping in userspace, calling do_mmap with &dma_buf.file will
> --
> 2.43.0.381.gb435a96ce8-goog

Reviewed-by: T.J. Mercier <tjmercier@google.com>

The code block highlighting is nice.

Ping.
Please let me know if I'm doing something wrong.

On Mon, Feb 19, 2024 at 11:00 AM Tommy Chiang <ototot@chromium.org> wrote:
>
> Kindly ping :)
>
> On Fri, Jan 19, 2024 at 11:33 AM Tommy Chiang <ototot@chromium.org> wrote:
> >
> > This patch tries to improve the display of the code listing
> > on The Linux Kernel documentation website for dma-buf [1] .
> >
> > Originally, it appears that it was attempting to escape
> > the '*' character, but looks like it's not necessary (now),
> > so we are seeing something like '\*' on the webite.
> >
> > This patch removes these unnecessary backslashes and adds syntax
> > highlighting to improve the readability of the code listing.
> >
> > [1] https://docs.kernel.org/driver-api/dma-buf.html
> >
> > Signed-off-by: Tommy Chiang <ototot@chromium.org>
> > ---
> >  drivers/dma-buf/dma-buf.c | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> > index 8fe5aa67b167..e083a0ab06d7 100644
> > --- a/drivers/dma-buf/dma-buf.c
> > +++ b/drivers/dma-buf/dma-buf.c
> > @@ -1282,10 +1282,12 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_move_notify, DMA_BUF);
> >   *   vmap interface is introduced. Note that on very old 32-bit architectures
> >   *   vmalloc space might be limited and result in vmap calls failing.
> >   *
> > - *   Interfaces::
> > + *   Interfaces:
> >   *
> > - *      void \*dma_buf_vmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
> > - *      void dma_buf_vunmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
> > + *   .. code-block:: c
> > + *
> > + *     void *dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
> > + *     void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map)
> >   *
> >   *   The vmap call can fail if there is no vmap support in the exporter, or if
> >   *   it runs out of vmalloc space. Note that the dma-buf layer keeps a reference
> > @@ -1342,10 +1344,11 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_move_notify, DMA_BUF);
> >   *   enough, since adding interfaces to intercept pagefaults and allow pte
> >   *   shootdowns would increase the complexity quite a bit.
> >   *
> > - *   Interface::
> > + *   Interface:
> > + *
> > + *   .. code-block:: c
> >   *
> > - *      int dma_buf_mmap(struct dma_buf \*, struct vm_area_struct \*,
> > - *                    unsigned long);
> > + *     int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, unsigned long);
> >   *
> >   *   If the importing subsystem simply provides a special-purpose mmap call to
> >   *   set up a mapping in userspace, calling do_mmap with &dma_buf.file will
> > --
> > 2.43.0.381.gb435a96ce8-goog
> >