<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SKL] lockdep splat"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93294#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SKL] lockdep splat"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93294">bug 93294</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>Reverse the polarity of the tachyon streams:
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 5b9d39633ce9..58a0ca0789a0 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -148,7 +148,6 @@ void cpu_hotplug_begin(void)
DEFINE_WAIT(wait);
cpu_hotplug.active_writer = current;
- cpuhp_lock_acquire();
for (;;) {
mutex_lock(&cpu_hotplug.lock);
@@ -159,13 +158,14 @@ void cpu_hotplug_begin(void)
schedule();
}
finish_wait(&cpu_hotplug.wq, &wait);
+ cpuhp_lock_acquire();
}
void cpu_hotplug_done(void)
{
+ cpuhp_lock_release();
cpu_hotplug.active_writer = NULL;
mutex_unlock(&cpu_hotplug.lock);
- cpuhp_lock_release();
}
/*</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>