linux-kernel - Re: [PATCH] kgdb: use new API for breakpoint tasklet

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Message-ID: <20210125110311.pmqddpkh2c247tmx@maple.lan>
Date:   Mon, 25 Jan 2021 11:03:11 +0000
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Emil Renner Berthing <kernel@...il.dk>
Cc:     kgdb-bugreport@...ts.sourceforge.net,
        Jason Wessel <jason.wessel@...driver.com>,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH] kgdb: use new API for breakpoint tasklet

On Sat, Jan 23, 2021 at 07:42:37PM +0100, Emil Renner Berthing wrote:
> This converts the kgdb_tasklet_breakpoint to use the new API in
> commit 12cc923f1ccc ("tasklet: Introduce new initialization API")
> 
> The new API changes the argument passed to the callback function, but
> fortunately the argument isn't used so it is straight forward to use
> DECLARE_TASKLET() rather than DECLARE_TASKLET_OLD().

This patch overlaps with a more ambitious patch from Davidlohr.
Perhaps you can join in with the other thread since the discussion
there is unresolved. See:
https://lkml.org/lkml/2021/1/14/1320


Daniel.


> 
> Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
> ---
>  kernel/debug/debug_core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
> index af6e8b4fb359..98d44c2bb0a4 100644
> --- a/kernel/debug/debug_core.c
> +++ b/kernel/debug/debug_core.c
> @@ -1090,13 +1090,13 @@ static void kgdb_unregister_callbacks(void)
>   * such as is the case with kgdboe, where calling a breakpoint in the
>   * I/O driver itself would be fatal.
>   */
> -static void kgdb_tasklet_bpt(unsigned long ing)
> +static void kgdb_tasklet_bpt(struct tasklet_struct *unused)
>  {
>  	kgdb_breakpoint();
>  	atomic_set(&kgdb_break_tasklet_var, 0);
>  }
>  
> -static DECLARE_TASKLET_OLD(kgdb_tasklet_breakpoint, kgdb_tasklet_bpt);
> +static DECLARE_TASKLET(kgdb_tasklet_breakpoint, kgdb_tasklet_bpt);
>  
>  void kgdb_schedule_breakpoint(void)
>  {
> -- 
> 2.30.0
>