linux-kernel - Re: [PATCH v2 1/1] tty: n_tty: Fix some misdocumented functions

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Date:   Thu, 27 May 2021 11:23:30 +0200
From:   Jiri Slaby <jirislaby@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Andrew J. Kroll" <ag784@...enet.buffalo.edu>,
        processes-Sapan Bhatia <sapan@...ewars.org>
Subject: Re: [PATCH v2 1/1] tty: n_tty: Fix some misdocumented functions

On 27. 05. 21, 10:20, Lee Jones wrote:
> On Thu, 27 May 2021, Jiri Slaby wrote:
> 
>> On 26. 05. 21, 10:31, Lee Jones wrote:
>>> Fixes the following W=1 kernel build warning(s):
>>>
>>>    drivers/tty/n_tty.c:623: warning: expecting prototype for process_echoes(). Prototype was for __process_echoes() instead
>>>    drivers/tty/n_tty.c:1109: warning: expecting prototype for isig(). Prototype was for __isig() instead
>>>    drivers/tty/n_tty.c:1268: warning: expecting prototype for n_tty_receive_char(). Prototype was for n_tty_receive_char_special() instead
>>>    drivers/tty/n_tty.c:2132: warning: Excess function parameter 'buf' description in 'n_tty_read'
>>>
>>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>>> Cc: Jiri Slaby <jirislaby@...nel.org>
>>> Cc: "Andrew J. Kroll" <ag784@...enet.buffalo.edu>
>>> Cc: processes-Sapan Bhatia <sapan@...ewars.org>
>>> Signed-off-by: Lee Jones <lee.jones@...aro.org>
>>> ---
>>>
>>> v2: Rebased
>>>
>>>    drivers/tty/n_tty.c | 10 +++++-----
>>>    1 file changed, 5 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
>>> index 0ec93f1a61f5d..56d3b43d8a3a4 100644
>>> --- a/drivers/tty/n_tty.c
>>> +++ b/drivers/tty/n_tty.c
>> ...
>>> @@ -1248,7 +1248,7 @@ n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c)
>>>    }
>>>    /**
>>> - *	n_tty_receive_char	-	perform processing
>>> + *	n_tty_receive_char_special	-	perform processing
>>
>> No, please move the doc to the function in this case instead.
> 
> Oh, so this *really* is the doc for n_tty_receive_char()?

Yes, it is supposed to. See 4b1f79c2d7352605b567cab49de20d3b67762ee3, 
which omitted to move the comment.

> 
>>>     *	@tty: terminal device
>>>     *	@c: character
>>>     *
>>> @@ -2042,11 +2042,11 @@ static int job_control(struct tty_struct *tty, struct file *file)
>>>    }
>>> -/**
>>> +/*
>>
>> Why this?
> 
> Because the author has missed:
> 
>    void **cookie, unsigned long offset

Oh, that. The doc by far predates the recent cookie introduction.

> Once these descriptions are provided, it can be re-promoted.

OK, I will fix this later. I am just putting the pieces together to link 
all these TTY kernel-docs from Documentation/.

thanks,
-- 
js
suse labs