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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - WARNING: CPU: 6 PID: 102 at drivers/gpu/drm/i915/intel_display.c:8977 intel_fb_obj_invalidate+0xe1/0xf0 [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87955#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - WARNING: CPU: 6 PID: 102 at drivers/gpu/drm/i915/intel_display.c:8977 intel_fb_obj_invalidate+0xe1/0xf0 [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87955">bug 87955</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Actually:
diff --git a/kernel/locking/mutex-debug.c b/kernel/locking/mutex-debug.c
index 5cf6731..3ef3736 100644
--- a/kernel/locking/mutex-debug.c
+++ b/kernel/locking/mutex-debug.c
@@ -80,13 +80,13 @@ void debug_mutex_unlock(struct mutex *lock)
DEBUG_LOCKS_WARN_ON(lock->owner != current);
DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev &&
!lock->wait_list.next);
- mutex_clear_owner(lock);
}
/*
* __mutex_slowpath_needs_to_unlock() is explicitly 0 for debug
* mutexes so that we can do it here after we've verified state.
*/
+ mutex_clear_owner(lock);
atomic_set(&lock->count, 1);
}</pre>
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