kernel_fb_helper_lock 82 drivers/gpu/drm/drm_fb_helper.c static DEFINE_MUTEX(kernel_fb_helper_lock); kernel_fb_helper_lock 590 drivers/gpu/drm/drm_fb_helper.c mutex_lock(&kernel_fb_helper_lock); kernel_fb_helper_lock 596 drivers/gpu/drm/drm_fb_helper.c mutex_unlock(&kernel_fb_helper_lock); kernel_fb_helper_lock 1844 drivers/gpu/drm/drm_fb_helper.c mutex_lock(&kernel_fb_helper_lock); kernel_fb_helper_lock 1849 drivers/gpu/drm/drm_fb_helper.c mutex_unlock(&kernel_fb_helper_lock);