linux-kernel - Re: [PATCH v3 1/2] modpost: rework and consolidate logging interface

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Message-ID: <CAK7LNARZ4VgaCa_TiDBG-99amBGTTXTQMs9LsK3nO4k+y-5KDQ@mail.gmail.com>
Date:   Mon, 9 Mar 2020 09:40:17 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Jessica Yu <jeyu@...nel.org>
Cc:     Matthias Maennich <maennich@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] modpost: rework and consolidate logging interface

Hi Jessica,



On Sat, Mar 7, 2020 at 1:02 AM Jessica Yu <jeyu@...nel.org> wrote:
>
> Rework modpost's logging interface by consolidating merror(), warn(), and
> fatal() to use a single function, modpost_log(). Introduce different
> logging levels (WARN, ERROR, FATAL) as well. The purpose of this cleanup is
> to reduce code duplication when deciding whether or not to warn or error
> out based on a condition.
>
> Signed-off-by: Jessica Yu <jeyu@...nel.org>
> ---
> v3:
>         - remove level variable from modpost_log and just call fprintf in each
>           case
>         - remove warn_unless and just call modpost_log() directly
>         - fix checkpatch error:
>                 ERROR: space required before the open parenthesis '('
>         #102: FILE: scripts/mod/modpost.c:61:
>         + switch(loglevel) {
>
>  scripts/mod/modpost.c | 68 ++++++++++++++++++++++-----------------------------
>  scripts/mod/modpost.h | 14 ++++++++---
>  2 files changed, 40 insertions(+), 42 deletions(-)
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 7edfdb2f4497..a2329235a6db 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -51,41 +51,34 @@ enum export {
>
>  #define MODULE_NAME_LEN (64 - sizeof(Elf_Addr))
>
> -#define PRINTF __attribute__ ((format (printf, 1, 2)))
> +#define PRINTF __attribute__ ((format (printf, 2, 3)))
>
> -PRINTF void fatal(const char *fmt, ...)
> +PRINTF void modpost_log(enum loglevel loglevel, const char *fmt, ...)
>  {


This series looks good to me.

I can queue it up to kbuild tree
if there is no objection.


I just noticed one nit.

Now that modpost_log() is the only user of PRINTF,
we can delete PRITNF, and directly add the attribute
to modpost_log(), like this:


void __attribute__((format(printf, 2, 3)))
modpost_log(enum loglevel loglevel, const char *fmt, ...)
{
       ...
}


If you agree, I can modify it when I apply it.


Thank you.



--
Best Regards
Masahiro Yamada