linux-kernel - Re: [PATCH rdma-rc 1/2] RDMA/mlx5: Set correct kernel-doc identifier

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Date:   Tue, 2 Mar 2021 13:35:41 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: Re: [PATCH rdma-rc 1/2] RDMA/mlx5: Set correct kernel-doc identifier

On Tue, Mar 02, 2021 at 10:44:10AM +0000, Lee Jones wrote:
> On Tue, 02 Mar 2021, Leon Romanovsky wrote:
>
> > On Tue, Mar 02, 2021 at 09:31:09AM +0000, Lee Jones wrote:
> > > On Tue, 02 Mar 2021, Leon Romanovsky wrote:
> > >
> > > > From: Leon Romanovsky <leonro@...dia.com>
> > > >
> > > > The W=1 allmodconfig build produces the following warning:
> > > > drivers/infiniband/hw/mlx5/odp.c:1086: warning: wrong kernel-doc identifier on line:
> > > >   * Parse a series of data segments for page fault handling.
> > > >
> > > > Fix it by changing /** to be /* as it is written in kernel-doc documentation.
> > > >
> > > > Fixes: 5e769e444d26 ("RDMA/hw/mlx5/odp: Fix formatting and add missing descriptions in 'pagefault_data_segments()'")
> > > > Signed-off-by: Leon Romanovsky <leonro@...dia.com>
> > > > ---
> > > >  drivers/infiniband/hw/mlx5/odp.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
> > > > index 374698186662..b103555b1f5d 100644
> > > > --- a/drivers/infiniband/hw/mlx5/odp.c
> > > > +++ b/drivers/infiniband/hw/mlx5/odp.c
> > > > @@ -1082,7 +1082,7 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev,
> > > >  	return ret ? ret : npages;
> > > >  }
> > > >
> > > > -/**
> > > > +/*
> > >
> > > This is not the correct fix.
> >
> > I don't want kernel-doc comments on static function. It is local to this
> > file, so change from /** to /* was to mark that this is not kernel-doc.
> >
> > >
> > > Kernel-doc is asking for the function name.
> >
> > The thing is that I don't want it to be kernel-doc.
>
> In the past, if the authors have made a good effort to document the
> function, I have left the kernel-doc formatting in place.  It looks
> odd / non-consistent to demote some, but not others.  Especially
> considering there are 100's if not 1000's of other static functions
> documented in the kernel with kernel-doc formatting.

I'm not interested to solve all kernel-doc issues, but only specific to
drivers/infiniband and especially this mlx5 driver which is under my
responsibility.

>
> There are also 1000's of uses that are left referenced by kernel-doc::
> tags.  See: scripts/find-unused-docs.sh for more details.
>
> If you're going to go through with this, you should at least say what
> you're doing and why in the commit message.  Since demoting an
> otherwise full and complete kernel-doc header seems a little harsh to
> say the least.

It wasn't kernel-doc from the beginning.

Thanks

>
> --
> Lee Jones [李琼斯]
> Senior Technical Lead - Developer Services
> Linaro.org │ Open source software for Arm SoCs
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