From: "Bruno Prémont" <bonbons@linux-vserver.org>
To: David Airlie <airlied@linux.ie>, Ben Skeggs <bskeggs@redhat.com>
Cc: Nouveau List <nouveau@lists.freedesktop.org>,
dri-devel@lists.freedesktop.org
Subject: [PATCH 1/3] nouveau: Do not BUG_ON(!spin_is_locked()) on UP
Date: Sun, 21 Dec 2014 17:43:31 +0100 [thread overview]
Message-ID: <20141221174331.3647ac49@neptune.home> (raw)
On !SMP systems spinlocks do not exist. Thus checking of they
are active will always fail.
Use
assert_spin_locked(lock);
instead of
BUG_ON(!spin_is_locked(lock));
to not BUG() on all UP systems.
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
---
See also fdo bug #87552
drivers/gpu/drm/nouveau/core/core/event.c | 4 ++--
drivers/gpu/drm/nouveau/core/core/notify.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/core/core/event.c b/drivers/gpu/drm/nouveau/core/core/event.c
index ff2b434..760947e 100644
--- a/drivers/gpu/drm/nouveau/core/core/event.c
+++ b/drivers/gpu/drm/nouveau/core/core/event.c
@@ -26,7 +26,7 @@
void
nvkm_event_put(struct nvkm_event *event, u32 types, int index)
{
- BUG_ON(!spin_is_locked(&event->refs_lock));
+ assert_spin_locked(&event->refs_lock);
while (types) {
int type = __ffs(types); types &= ~(1 << type);
if (--event->refs[index * event->types_nr + type] == 0) {
@@ -39,7 +39,7 @@ nvkm_event_put(struct nvkm_event *event, u32 types, int index)
void
nvkm_event_get(struct nvkm_event *event, u32 types, int index)
{
- BUG_ON(!spin_is_locked(&event->refs_lock));
+ assert_spin_locked(&event->refs_lock);
while (types) {
int type = __ffs(types); types &= ~(1 << type);
if (++event->refs[index * event->types_nr + type] == 1) {
diff --git a/drivers/gpu/drm/nouveau/core/core/notify.c b/drivers/gpu/drm/nouveau/core/core/notify.c
index d1bcde5..839a325 100644
--- a/drivers/gpu/drm/nouveau/core/core/notify.c
+++ b/drivers/gpu/drm/nouveau/core/core/notify.c
@@ -98,7 +98,7 @@ nvkm_notify_send(struct nvkm_notify *notify, void *data, u32 size)
struct nvkm_event *event = notify->event;
unsigned long flags;
- BUG_ON(!spin_is_locked(&event->list_lock));
+ assert_spin_locked(&event->list_lock);
BUG_ON(size != notify->size);
spin_lock_irqsave(&event->refs_lock, flags);
--
1.8.1.5
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next reply other threads:[~2014-12-21 16:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-21 16:43 Bruno Prémont [this message]
2015-01-12 19:00 ` [PATCH 1/3] nouveau: Do not BUG_ON(!spin_is_locked()) on UP Bruno Prémont
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