linux-kernel - Re: [PATCH V3 7/9] tracing: Add __print_ns_to_secs() and __print_ns_without

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Message-ID: <20210604122128.0d348960@oasis.local.home>
Date:   Fri, 4 Jun 2021 12:21:28 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Daniel Bristot de Oliveira <bristot@...hat.com>,
        linux-kernel@...r.kernel.org, Phil Auld <pauld@...hat.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Kate Carcia <kcarcia@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Clark Willaims <williams@...hat.com>,
        John Kacur <jkacur@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>, linux-doc@...r.kernel.org
Subject: Re: [PATCH V3 7/9] tracing: Add __print_ns_to_secs() and
 __print_ns_without_secs() helpers

On Thu, 03 Jun 2021 21:19:50 -0700
Joe Perches <joe@...ches.com> wrote:

> If tracing cleanups for trace_events.h are being done, perhaps
> another bit of untidiness is the macro definition and uses of
> __assign_str.

This isn't a tracing cleanup, but adding new functionality.

That said,

> 
> $ git grep -w -1 __assign_str include/trace/trace_events.h
> include/trace/trace_events.h-
> include/trace/trace_events.h:#undef __assign_str
> include/trace/trace_events.h:#define __assign_str(dst, src)                                             \
> include/trace/trace_events.h-   strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
> 
> Its definition has a semicolon as do most uses but a dozen handfuls of
> other uses do not have a semicolon.  It'd be more consistent to add a
> semicolon to the uses without them and when done treewide, then remove
> the semicolon from the macro declaration.

I have no problem taking a clean up patch that adds semicolons to all
use cases of "__assign_str()" and ever remove the one from where it is
defined. As long as it doesn't break any builds, I'm fine with that.

-- Steve