From 7d52cb88c9ca20c32288de6ed62b32410c936ccc Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 8 Mar 2017 15:12:43 +0100 Subject: [PATCH] drm: Remove drm_pending_event->pid We might as well dump the drm_file pointer, that's about as useful a cookie as the pid. Noticed while typing docs for drm_file and friends. Since the only consumer of this is the tracepoints I think we can safely change this - those tracepoints should not be uapi relevant at all. It all goes back to commit b9c2c9ae882f058084e13e339925dbf8d2d20271 Author: Jesse Barnes Date: Thu Jul 1 16:48:09 2010 -0700 drm: add per-event vblank event trace points which doesn't give a special justification for using pid over a pointer. Also note that the nouveau code setting it is entirely pointless: Since this isn't a vblank event, it will never hit the vblank tracepoints. Cc: Ben Skeggs Reviewed-by: Sean Paul Reviewed-by: Liviu Dudau Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170308141257.12119-11-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_irq.c | 5 ++--- drivers/gpu/drm/drm_trace.h | 20 ++++++++++---------- drivers/gpu/drm/nouveau/nouveau_usif.c | 1 - include/drm/drm_file.h | 2 -- 4 files changed, 12 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 1906723af389..9bdca69f754c 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -978,7 +978,7 @@ static void send_vblank_event(struct drm_device *dev, e->event.tv_sec = now->tv_sec; e->event.tv_usec = now->tv_usec; - trace_drm_vblank_event_delivered(e->base.pid, e->pipe, + trace_drm_vblank_event_delivered(e->base.file_priv, e->pipe, e->event.sequence); drm_send_event_locked(dev, &e->base); @@ -1505,7 +1505,6 @@ static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe, } e->pipe = pipe; - e->base.pid = current->pid; e->event.base.type = DRM_EVENT_VBLANK; e->event.base.length = sizeof(e->event); e->event.user_data = vblwait->request.signal; @@ -1534,7 +1533,7 @@ static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe, DRM_DEBUG("event on vblank count %u, current %u, crtc %u\n", vblwait->request.sequence, seq, pipe); - trace_drm_vblank_event_queued(current->pid, pipe, + trace_drm_vblank_event_queued(file_priv, pipe, vblwait->request.sequence); e->event.sequence = vblwait->request.sequence; diff --git a/drivers/gpu/drm/drm_trace.h b/drivers/gpu/drm/drm_trace.h index ce3c42813fbb..14c5a777682e 100644 --- a/drivers/gpu/drm/drm_trace.h +++ b/drivers/gpu/drm/drm_trace.h @@ -24,36 +24,36 @@ TRACE_EVENT(drm_vblank_event, ); TRACE_EVENT(drm_vblank_event_queued, - TP_PROTO(pid_t pid, int crtc, unsigned int seq), - TP_ARGS(pid, crtc, seq), + TP_PROTO(struct drm_file *file, int crtc, unsigned int seq), + TP_ARGS(file, crtc, seq), TP_STRUCT__entry( - __field(pid_t, pid) + __field(struct drm_file *, file) __field(int, crtc) __field(unsigned int, seq) ), TP_fast_assign( - __entry->pid = pid; + __entry->file = file; __entry->crtc = crtc; __entry->seq = seq; ), - TP_printk("pid=%d, crtc=%d, seq=%u", __entry->pid, __entry->crtc, \ + TP_printk("file=%p, crtc=%d, seq=%u", __entry->file, __entry->crtc, \ __entry->seq) ); TRACE_EVENT(drm_vblank_event_delivered, - TP_PROTO(pid_t pid, int crtc, unsigned int seq), - TP_ARGS(pid, crtc, seq), + TP_PROTO(struct drm_file *file, int crtc, unsigned int seq), + TP_ARGS(file, crtc, seq), TP_STRUCT__entry( - __field(pid_t, pid) + __field(struct drm_file *, file) __field(int, crtc) __field(unsigned int, seq) ), TP_fast_assign( - __entry->pid = pid; + __entry->file = file; __entry->crtc = crtc; __entry->seq = seq; ), - TP_printk("pid=%d, crtc=%d, seq=%u", __entry->pid, __entry->crtc, \ + TP_printk("file=%p, crtc=%d, seq=%u", __entry->file, __entry->crtc, \ __entry->seq) ); diff --git a/drivers/gpu/drm/nouveau/nouveau_usif.c b/drivers/gpu/drm/nouveau/nouveau_usif.c index afbdbed1a690..9dc10b17ad34 100644 --- a/drivers/gpu/drm/nouveau/nouveau_usif.c +++ b/drivers/gpu/drm/nouveau/nouveau_usif.c @@ -211,7 +211,6 @@ usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc) goto done; ntfy->p->base.event = &ntfy->p->e.base; ntfy->p->base.file_priv = f; - ntfy->p->base.pid = current->pid; ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF; ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply; diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index d1a25cc17fd1..4e347399a7bd 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -75,8 +75,6 @@ struct drm_pending_event { struct list_head link; struct list_head pending_link; struct drm_file *file_priv; - pid_t pid; /* pid of requester, no guarantee it's valid by the time - we deliver the event, for tracing only */ }; /** File private data */ -- GitLab