linux-kernel - Re: [PATCH] dma-buf: add the name field to the table header

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Date:   Thu, 28 Apr 2022 15:24:49 +0530
From:   Sumit Semwal <sumit.semwal@...aro.org>
To:     Christian König <christian.koenig@....com>
Cc:     Yuanzheng Song <songyuanzheng@...wei.com>,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dma-buf: add the name field to the table header

Hi Christian,

On Thu, 28 Apr 2022 at 13:33, Christian König <christian.koenig@....com> wrote:
>
> Am 28.04.22 um 08:39 schrieb Yuanzheng Song:
> > 'cat /sys/kernel/debug/dma_buf/bufinfo' will print the Dma-buf
> > Objects' information when the CONFIG_DEBUG_FS=y.
> > However, the printed table header information does not contain
> > the name field. So we need to add the name field to the table
> > header and use the '<none>' to replace the empty buf_obj->name.
> >
> > Signed-off-by: Yuanzheng Song <songyuanzheng@...wei.com>
>
> Reviewed-by: Christian König <christian.koenig@....com>
>
> Sumit do you want to push this or should I go ahead?

No worries, I can push it out.

Thanks :)
>
> > ---
> >   drivers/dma-buf/dma-buf.c | 4 ++--
> >   1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> > index 79795857be3e..a2f9a1815e38 100644
> > --- a/drivers/dma-buf/dma-buf.c
> > +++ b/drivers/dma-buf/dma-buf.c
> > @@ -1351,7 +1351,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
> >               return ret;
> >
> >       seq_puts(s, "\nDma-buf Objects:\n");
> > -     seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\n",
> > +     seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\tname\n",
> >                  "size", "flags", "mode", "count", "ino");
> >
> >       list_for_each_entry(buf_obj, &db_list.head, list_node) {
> > @@ -1368,7 +1368,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
> >                               file_count(buf_obj->file),
> >                               buf_obj->exp_name,
> >                               file_inode(buf_obj->file)->i_ino,
> > -                             buf_obj->name ?: "");
> > +                             buf_obj->name ?: "<none>");
> >               spin_unlock(&buf_obj->name_lock);
> >
> >               dma_resv_describe(buf_obj->resv, s);
>

Best,
Sumit.