linux-kernel - Re: [GIT pull] printk updates for 4.15

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Message-ID: <CA+55aFzM+UK=X163YHqAjYnt2ne0oBq9AT1+Ct8XoxbwOmH4rA@mail.gmail.com>
Date:   Tue, 14 Nov 2017 15:00:10 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Mark Salyzyn <salyzyn@...roid.com>, Petr Mladek <pmladek@...e.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Prarit Bhargava <prarit@...hat.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [GIT pull] printk updates for 4.15

On Tue, Nov 14, 2017 at 2:50 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
>
> Something like the untested patch below should do the storage and converts
> the primary timestamp from local_clock() to clock monotonic.

This  may work.

> -       u64 ts_nsec;            /* timestamp in nanoseconds */
> +       /* Timestamps in nanoseconds */
> +       union {
> +               u64                     ts_nsec;
> +               struct timestamps       ts;
> +       };

But I'd skip the union, and just search-and-replace the ts_nsec ->
ts.mono. You did that in at least one place anyway.

Because as it is, that's just too subtle and hard to read. Don't make
it worse by having a magical "ts_nsec is also ts.mono, but you have to
look in two different files to see that.

That file is messy enough as-is.

             Linus