Commit 214b0dd5 authored May 28, 2019 by Daniel Vetter

dummycon: Sprinkle locking checks



As part of trying to understand the locking (or lack thereof) in the
fbcon/vt/fbdev maze, annotate everything.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528090304.9388-2-daniel.vetter@ffwll.ch

parent d1fdb6d8

drivers/video/console/dummycon.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,8 @@ static bool dummycon_putc_called;

		void dummycon_register_output_notifier(struct notifier_block *nb)
		{
		WARN_CONSOLE_UNLOCKED();

		raw_notifier_chain_register(&dummycon_output_nh, nb);

		if (dummycon_putc_called)
		@@ -42,11 +44,15 @@ void dummycon_register_output_notifier(struct notifier_block *nb)

		void dummycon_unregister_output_notifier(struct notifier_block *nb)
		{
		WARN_CONSOLE_UNLOCKED();

		raw_notifier_chain_unregister(&dummycon_output_nh, nb);
		}

		static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos)
		{
		WARN_CONSOLE_UNLOCKED();

		dummycon_putc_called = true;
		raw_notifier_call_chain(&dummycon_output_nh, 0, NULL);
		}