linux-kernel - Re: [PATCH 0/2] dyndbg: let's use the module notifier callback

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Message-ID: <CAJfuBxwOwJzbeX8OMsS7axWEJSHumjJ=LVAS9WYGdPvyQCSOzQ@mail.gmail.com>
Date:   Thu, 16 Feb 2023 23:02:21 -0700
From:   jim.cromie@...il.com
To:     Jason Baron <jbaron@...mai.com>
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: [PATCH 0/2] dyndbg: let's use the module notifier callback

On Thu, Feb 16, 2023 at 10:16 AM Jason Baron <jbaron@...mai.com> wrote:
>
> Hi,
>
> Jim Cromie hit a BUG() while toggling jump label branches in a module
> before they were properly initialized. This isn't currently an issue,
> but will be as part of his pending classmap series. Seems like we
> should covert to using module callback notifier for dynamic debug
> anyways. First patch is just a cleanup.
>
> Link: https://lore.kernel.org/lkml/20230113193016.749791-21-jim.cromie@gmail.com/
>
> Thanks,
>
> -Jason
>
> Jason Baron (2):
>   dyndbg: remove unused 'base' arg from __ddebug_add_module()
>   dyndbg: use the module notifier callbacks

Ive rebased my set upon yours, and dropped my RFC-workaround patch.
No panics on uninitialized jump-labels,
and test script works correctly.

Tested-by: Jim Cromie <jim.cromie@...il.com>

I will include your commits in my next send, so theyre testable as a set.

thanks
Jim




>
>  include/linux/dynamic_debug.h | 13 ----------
>  include/linux/module.h        |  3 +++
>  kernel/module/internal.h      |  1 -
>  kernel/module/main.c          | 30 ++++++---------------
>  lib/dynamic_debug.c           | 49 ++++++++++++++++++++++++++++-------
>  5 files changed, 51 insertions(+), 45 deletions(-)
>
> --
> 2.17.1
>