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

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Date:   Thu, 03 Nov 2016 17:55:39 +0100
From:   Nicolai Stange <nicstange@...il.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     netdev@...r.kernel.org, Nicolai Stange <nicstange@...il.com>,
        Christian Lamparter <chunkeey@...il.com>
Subject: Re: [PATCH net-next 10/13] debugfs: constify argument to debugfs_real_fops()

Hi Jakub,

thanks for this.

However, the debugfs maintainer, Greg K-H, as well as the lkml is
missing from the To/Cc. Can you resend please?

Jakub Kicinski <jakub.kicinski@...ronome.com> writes:

> 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: Nicolai Stange <nicstange@...il.com>
> CC: Christian Lamparter <chunkeey@...il.com>
> 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)
>  	__must_hold(&debugfs_srcu)
>  {
>  	/*