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drm/doc: add WARNING for drm_device::struct_mutex 

The mutex should be used, only by legacy drivers. Add a big warning to
deter people from using it.

Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200515095118.2743122-6-emil.l.velikov@gmail.com
This commit is contained in:
Emil Velikov 2020-05-15 10:50:45 +01:00 committed by Emil Velikov
parent 5b4231fb62
commit e33f423426
1 changed files with 3 additions and 0 deletions
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3
include/drm/drm_device.h
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@ -146,6 +146,9 @@ struct drm_device {
* @struct_mutex:
*
* Lock for others (not &drm_minor.master and &drm_file.is_master)
*
* WARNING:
* Only drivers annotated with DRIVER_LEGACY should be using this.
*/
struct mutex struct_mutex;