linux-kernel - Re: [PATCH net-next resend 10/13] debugfs: constify argument to debugfs_real

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Date:   Thu, 10 Nov 2016 15:42:47 +0000
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     netdev@...r.kernel.org, Nicolai Stange <nicstange@...il.com>,
        Christian Lamparter <chunkeey@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next resend 10/13] debugfs: constify argument to
 debugfs_real_fops()

On Thu, 10 Nov 2016 15:25:59 +0100, Greg Kroah-Hartman wrote:
> On Thu, Nov 03, 2016 at 05:12:06PM +0000, Jakub Kicinski wrote:
> > seq_file users can only access const version of file pointer,
> > because the ->file member of struct seq_operations is marked
> > as such.  Make parameter to debugfs_real_fops() const.
> > 
> > CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > CC: Nicolai Stange <nicstange@...il.com>
> > CC: Christian Lamparter <chunkeey@...il.com>
> > CC: LKML <linux-kernel@...r.kernel.org>
> > Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> > ---
> >  include/linux/debugfs.h | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
> > index 4d3f0d1aec73..bf1907d96097 100644
> > --- a/include/linux/debugfs.h
> > +++ b/include/linux/debugfs.h
> > @@ -52,7 +52,8 @@ struct debugfs_regset32 {
> >   * Must only be called under the protection established by
> >   * debugfs_use_file_start().
> >   */
> > -static inline const struct file_operations *debugfs_real_fops(struct file *filp)
> > +static inline const struct file_operations *
> > +debugfs_real_fops(const struct file *filp)  
> 
> Ick.  Tell me that looks better :(
> 
> Please just don't wrap things like that, just make it go longer than 80
> columns, I can handle the complaints...

Ugh, I should've gone with my gut feeling then.  I'll post a fix up
shortly since this is already in Dave's tree.