linux-kernel - Re: [PATCHv2 01/50] kallsyms/printk: Add loglvl to print_ip

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Message-ID: <7d17eaf8-a3a8-eaba-ff80-e857135571e1@arista.com>
Date:   Fri, 17 Apr 2020 23:59:00 +0100
From:   Dmitry Safonov <dima@...sta.com>
To:     Joe Perches <joe@...ches.com>, linux-kernel@...r.kernel.org
Cc:     Dmitry Safonov <0x7f454c46@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>, Jiri Slaby <jslaby@...e.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Albert Ou <aou@...s.berkeley.edu>,
        Ben Segall <bsegall@...gle.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Greentime Hu <green.hu@...il.com>,
        Ingo Molnar <mingo@...hat.com>,
        James Hogan <jhogan@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Mel Gorman <mgorman@...e.de>, Michal Simek <monstr@...str.eu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Burton <paulburton@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincent Chen <deanbo422@...il.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Will Deacon <will@...nel.org>, linux-mips@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCHv2 01/50] kallsyms/printk: Add loglvl to print_ip_sym()

Hi Joe,

On 3/16/20 3:29 PM, Joe Perches wrote:
> On Mon, 2020-03-16 at 14:38 +0000, Dmitry Safonov wrote:
>> print_ip_sym() needs to have a log level parameter to comply with other
>> parts being printed. Otherwise, half of the expected backtrace would be
>> printed and other may be missing with some logging level.
> 
> There are 15 instances of print_ip_sym.
> 
> Perhaps it'd be better to get rid of print_ip_sym
> altogether by expanding it in-place instead.

I tried this and format-string + two casts to (void *) take some space
and the resulting printk() doesn't fit 80 cols.
I guess, it's minor and it can be done on the top of v3..

> 
>>  arch/microblaze/kernel/unwind.c | 2 +-
>>  arch/mips/kernel/traps.c        | 4 ++--
>>  arch/nds32/kernel/traps.c       | 4 ++--
>>  arch/riscv/kernel/stacktrace.c  | 2 +-
>>  include/linux/kallsyms.h        | 4 ++--
>>  kernel/locking/lockdep.c        | 4 ++--
>>  kernel/sched/core.c             | 6 ++----
>>  kernel/trace/ftrace.c           | 8 ++++----
>>  tools/include/linux/kallsyms.h  | 2 +-
> 
> 

Thanks,
          Dmitry