[PATCH v3 1/2] console: Replace #if 0 with atomic var 'ignore_console_lock_warning'

[Bartlomiej Zolnierkiewicz]

On Thursday, July 19, 2018 12:16:00 PM Thomas Zimmermann wrote:
> The macro WARN_CONSOLE_UNLOCKED prints a warning when a thread enters
> the console's critical section without having acquired the console
> lock. The console lock can be ignored when debugging the console using
> printk, but this makes WARN_CONSOLE_UNLOCKED generate unnecessary
> warnings.
> 
> The variable ignore_console_lock_warning temporarily disables
> WARN_CONSOLE_UNLOCKED. Developers interested in debugging the console's
> critical sections should increment it before entering the CS and
> decrement it after leaving the CS. Setting ignore_console_lock_warning
> is only for debugging. Regular operation should not manipulate it.
> 
> Acknoledgements: This patch is based on an earlier version by Steven
> Rostedt. The use of atomic increment/decrement was suggested by Petr
> Mladek.
> 
> Link: http://lkml.kernel.org/r/717e6337-e7a6-7a92-1c1b-8929a25696b5@suse.de
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>

Patch queued for 4.19 (w/ <asm/atomic.h> -> <linux/atomic.h> fixup), thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics