linux-kernel - Re: [PATCH] spi: use kthread_create

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Message-ID: <20200708102642.GF4655@sirena.org.uk>
Date:   Wed, 8 Jul 2020 11:26:42 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        Zhang Qiang <qiang.zhang@...driver.com>,
        Petr Mladek <pmladek@...e.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH] spi: use kthread_create_worker() helper

On Wed, Jul 08, 2020 at 09:09:00AM +0200, Marek Szyprowski wrote:

> ------------[ cut here ]------------
> WARNING: CPU: 3 PID: 1 at kernel/kthread.c:817 kthread_queue_work+0xac/0xd4
> Modules linked in:
> CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.8.0-rc4-00017-g4977caef05aa #1193
> Hardware name: Samsung Exynos (Flattened Device Tree)
> [<c011184c>] (unwind_backtrace) from [<c010d250>] (show_stack+0x10/0x14)
> [<c010d250>] (show_stack) from [<c0517f64>] (dump_stack+0xbc/0xe8)
> [<c0517f64>] (dump_stack) from [<c01270a8>] (__warn+0xf0/0x108)
> [<c01270a8>] (__warn) from [<c0127170>] (warn_slowpath_fmt+0xb0/0xb8)
> [<c0127170>] (warn_slowpath_fmt) from [<c01512a4>] (kthread_queue_work+0xac/0xd4)

Please think hard before including complete backtraces in upstream
reports, they are very large and contain almost no useful information
relative to their size so often obscure the relevant content in your
message. If part of the backtrace is usefully illustrative (it often is
for search engines if nothing else) then it's usually better to pull out
the relevant sections.

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