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Date:   Tue, 20 Dec 2022 20:39:56 +0100
From:   Pavel Machek <>
To:     Steven Rostedt <>
Cc:     Linus Torvalds <>,
        Thomas Gleixner <>,
        LKML <>,
        Stephen Boyd <>,
        Guenter Roeck <>,
        Anna-Maria Gleixner <>,
        Andrew Morton <>,
        Julia Lawall <>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Subject: Re: [PATCH] treewide: Convert del_timer*() to timer_shutdown*()

On Tue 2022-12-20 13:45:19, Steven Rostedt wrote:
> [
>   Linus,
>     I ran the script against your latest master branch:
>     commit b6bb9676f2165d518b35ba3bea5f1fcfc0d969bf
>     As the timer_shutdown*() code is now in your tree, I figured
>     we can start doing the conversions. At least add the trivial ones
>     now as Thomas suggested that this gets applied at the end of the
>     merge window, to avoid conflicts with linux-next during the
>     development cycle. I can wait to Friday to run it again, and
>     resubmit.
>     What is the best way to handle this?
> ]
> From: "Steven Rostedt (Google)" <>
> Due to several bugs caused by timers being re-armed after they are
> shutdown and just before they are freed, a new state of timers was added
> called "shutdown". After a timer is set to this state, then it can no
> longer be re-armed.
> The following script was run to find all the trivial locations where
> del_timer() or del_timer_sync() is called in the same function that the
> object holding the timer is freed. It also ignores any locations where the
> timer->function is modified between the del_timer*() and the free(), as
> that is not considered a "trivial" case.
> This was created by using a coccinelle script and the following

LED parts looks good to me.

Getting it in just before -rc1 would be best solution for me.

Best regards,
People of Russia, stop Putin before his war on Ukraine escalates.

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