[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAD=FV=VFxKL=sOMdhyHrgy2JOtzKJdOe4euwZRRAK7P-rNVjuQ@mail.gmail.com>
Date: Mon, 24 Oct 2022 15:46:12 -0700
From: Doug Anderson <dianders@...omium.org>
To: John Ogness <john.ogness@...utronix.de>
Cc: Petr Mladek <pmladek@...e.com>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org,
Jason Wessel <jason.wessel@...driver.com>,
Daniel Thompson <daniel.thompson@...aro.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>,
kgdb-bugreport@...ts.sourceforge.net, linux-serial@...r.kernel.org
Subject: Re: [PATCH printk v2 12/38] tty: serial: kgdboc: use console_is_enabled()
Hi,
On Wed, Oct 19, 2022 at 7:56 AM John Ogness <john.ogness@...utronix.de> wrote:
>
> Replace (console->flags & CON_ENABLED) usage with console_is_enabled().
>
> Signed-off-by: John Ogness <john.ogness@...utronix.de>
> ---
> drivers/tty/serial/kgdboc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
> index e76f0186c335..b17aa7e49894 100644
> --- a/drivers/tty/serial/kgdboc.c
> +++ b/drivers/tty/serial/kgdboc.c
> @@ -533,7 +533,7 @@ static int __init kgdboc_earlycon_init(char *opt)
> console_lock();
> for_each_console(con) {
> if (con->write && con->read &&
> - (con->flags & (CON_BOOT | CON_ENABLED)) &&
> + (console_is_enabled(con) || (con->flags & CON_BOOT)) &&
<shrug>. I guess this is OK, but it feels a little pointless. If we're
still directly looking at the CON_BOOT bit in con->flags it seems
weird to be accessing CON_ENABLED through a special wrapper that's
marked as a `data_race`. In our case it's _not_ a data race, right,
since this function continues to hold the console_lock() even at the
end of the series? I personally would drop this patch but if you
really want it I won't object.
-Doug
Powered by blists - more mailing lists