From: Petr Mladek <pmladek@suse.com>
To: John Ogness <john.ogness@linutronix.de>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org,
"Paul E. McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <quic_neeraju@quicinc.com>,
Josh Triplett <josh@joshtriplett.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Joel Fernandes <joel@joelfernandes.org>,
rcu@vger.kernel.org
Subject: Re: [PATCH printk v3 01/40] rcu: implement lockdep_rcu_enabled for !CONFIG_DEBUG_LOCK_ALLOC
Date: Tue, 8 Nov 2022 11:29:32 +0100 [thread overview]
Message-ID: <Y2ovjKa11/yojrNK@alley> (raw)
In-Reply-To: <20221107141638.3790965-2-john.ogness@linutronix.de>
On Mon 2022-11-07 15:21:59, John Ogness wrote:
> Provide an implementation for debug_lockdep_rcu_enabled() when
> CONFIG_DEBUG_LOCK_ALLOC is not enabled. This allows code to check
> if rcu lockdep debugging is available without needing an extra
> check if CONFIG_DEBUG_LOCK_ALLOC is enabled.
>
> Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Just a small nit below.
> ---
> I also sent this patch to Paul as a suggestion. If it is not
> acceptable, I just need to add an ifdef CONFIG_DEBUG_LOCK_ALLOC
> into console_list_lock() of patch 21.
>
> include/linux/rcupdate.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
> index 08605ce7379d..65178c40ab6f 100644
> --- a/include/linux/rcupdate.h
> +++ b/include/linux/rcupdate.h
> @@ -340,6 +340,11 @@ static inline int rcu_read_lock_any_held(void)
> return !preemptible();
> }
>
> +static inline int debug_lockdep_rcu_enabled(void)
> +{
> + return 0;
> +}
> +
It would make sense to move this up before rcu_read_lock_held()
definition so that the declarations and definitions are in
the same order in both #ifdef CONFIG_DEBUG_LOCK_ALLOC branches.
> #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
>
> #ifdef CONFIG_PROVE_RCU
Best Regards,
PEtr
next prev parent reply other threads:[~2022-11-08 10:29 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-07 14:15 [PATCH printk v3 00/40] reduce console_lock scope John Ogness
2022-11-07 14:15 ` [PATCH printk v3 01/40] rcu: implement lockdep_rcu_enabled for !CONFIG_DEBUG_LOCK_ALLOC John Ogness
2022-11-07 18:01 ` Paul E. McKenney
2022-11-07 19:23 ` John Ogness
2022-11-08 19:27 ` Paul E. McKenney
2022-11-09 17:49 ` Paul E. McKenney
2022-11-08 10:29 ` Petr Mladek [this message]
2022-11-07 14:16 ` [PATCH printk v3 02/40] serial: kgdboc: Lock console list in probe function John Ogness
2022-11-09 8:20 ` Daniel Thompson
2022-11-07 14:16 ` [PATCH printk v3 03/40] printk: Convert console_drivers list to hlist John Ogness
2022-11-07 14:16 ` [PATCH printk v3 04/40] printk: Prepare for SRCU console list protection John Ogness
2022-11-08 12:14 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 05/40] printk: fix setting first seq for consoles John Ogness
2022-11-08 12:20 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 06/40] um: kmsg_dump: only dump when no output console available John Ogness
2022-11-08 12:41 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 07/40] console: introduce console_is_enabled() wrapper John Ogness
2022-11-08 16:18 ` Petr Mladek
2022-11-10 15:05 ` John Ogness
2022-11-11 13:32 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 08/40] printk: use console_is_enabled() John Ogness
2022-11-08 17:40 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 09/40] um: kmsg_dump: " John Ogness
2022-11-09 14:52 ` Petr Mladek
2022-11-09 14:56 ` Petr Mladek
2022-11-09 14:57 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 10/40] kdb: kdb_io: " John Ogness
2022-11-09 8:22 ` Daniel Thompson
2022-11-09 14:59 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 11/40] um: kmsg_dumper: use srcu console list iterator John Ogness
2022-11-09 15:05 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 12/40] tty: serial: kgdboc: document console_lock usage John Ogness
2022-11-09 8:23 ` Daniel Thompson
2022-11-09 15:19 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 13/40] tty: tty_io: " John Ogness
2022-11-09 15:20 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 14/40] proc: consoles: " John Ogness
2022-11-09 15:22 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 15/40] kdb: use srcu console list iterator John Ogness
2022-11-09 8:53 ` Daniel Thompson
2022-11-09 9:27 ` John Ogness
2022-11-09 15:27 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 16/40] printk: console_flush_all: " John Ogness
2022-11-07 14:16 ` [PATCH printk v3 17/40] printk: console_unblank: " John Ogness
2022-11-07 14:16 ` [PATCH printk v3 18/40] printk: console_flush_on_panic: " John Ogness
2022-11-07 14:16 ` [PATCH printk v3 19/40] printk: console_device: " John Ogness
2022-11-09 15:58 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 20/40] printk: __pr_flush: " John Ogness
2022-11-07 14:16 ` [PATCH printk v3 21/40] printk: introduce console_list_lock John Ogness
2022-11-10 12:58 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 22/40] console: introduce console_is_registered() John Ogness
2022-11-10 13:00 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 23/40] serial_core: replace uart_console_enabled() with uart_console_registered() John Ogness
2022-11-08 8:46 ` Geert Uytterhoeven
2022-11-10 13:24 ` Petr Mladek
2022-11-10 13:46 ` John Ogness
2022-11-07 14:16 ` [PATCH printk v3 24/40] tty: nfcon: use console_is_registered() John Ogness
2022-11-08 8:39 ` Geert Uytterhoeven
2022-11-10 13:58 ` Petr Mladek
2022-11-10 14:19 ` John Ogness
2022-11-10 17:50 ` Eero Tamminen
2022-11-07 14:16 ` [PATCH printk v3 25/40] efi: earlycon: " John Ogness
2022-11-10 14:28 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 26/40] tty: hvc: " John Ogness
2022-11-10 14:52 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 27/40] tty: serial: earlycon: " John Ogness
2022-11-10 15:00 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 28/40] tty: serial: pic32_uart: " John Ogness
2022-11-10 15:01 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 29/40] tty: serial: samsung_tty: " John Ogness
2022-11-10 15:01 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 30/40] tty: serial: xilinx_uartps: " John Ogness
2022-11-10 15:04 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 31/40] usb: early: xhci-dbc: " John Ogness
2022-11-10 15:05 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 32/40] netconsole: avoid CON_ENABLED misuse to track registration John Ogness
2022-11-10 15:17 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 33/40] printk, xen: fbfront: create/use safe function for forcing preferred John Ogness
2022-11-10 15:34 ` Petr Mladek
2022-11-10 16:03 ` John Ogness
2022-11-10 17:26 ` Petr Mladek
2022-11-10 22:37 ` John Ogness
2022-11-11 10:48 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 34/40] tty: tty_io: use console_list_lock for list synchronization John Ogness
2022-11-07 14:16 ` [PATCH printk v3 35/40] proc: consoles: use console_list_lock for list iteration John Ogness
2022-11-07 14:16 ` [PATCH printk v3 36/40] tty: serial: kgdboc: use console_list_lock for list traversal John Ogness
2022-11-09 9:06 ` Daniel Thompson
2022-11-09 9:44 ` John Ogness
2022-11-10 18:00 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 37/40] tty: serial: kgdboc: synchronize tty_find_polling_driver() and register_console() John Ogness
2022-11-10 15:13 ` Daniel Thompson
2022-11-10 18:03 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 38/40] tty: serial: kgdboc: use console_list_lock to trap exit John Ogness
2022-11-10 15:18 ` Daniel Thompson
2022-11-11 9:59 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 39/40] printk: relieve console_lock of list synchronization duties John Ogness
2022-11-07 16:30 ` John Ogness
2022-11-11 10:27 ` Petr Mladek
2022-11-11 13:06 ` Petr Mladek
2022-11-07 14:16 ` [PATCH printk v3 40/40] tty: serial: sh-sci: use setup() callback for early console John Ogness
2022-11-08 8:53 ` Geert Uytterhoeven
2022-11-11 17:15 ` Petr Mladek
2022-11-11 14:43 ` [PATCH printk v3 00/40] reduce console_lock scope Mathieu Desnoyers
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