From: Sasha Levin <levinsasha928@gmail.com>
Date: Sat, 30 Apr 2011 13:30:23 +0000 (+0300)
Subject: kvm tools: Lock job_mutex before signalling
X-Git-Tag: next-20110824~3^2~374
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=58d3cc0912c50aa7cb20e20ca445ad7a567b339f;p=karo-tx-linux.git

kvm tools: Lock job_mutex before signalling

Locking mutex before signalling to prevent unexpected
scheduling.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

diff --git a/tools/kvm/threadpool.c b/tools/kvm/threadpool.c
index 25d9aad1d5a2..2db0218413d0 100644
--- a/tools/kvm/threadpool.c
+++ b/tools/kvm/threadpool.c
@@ -166,5 +166,7 @@ void thread_pool__do_job(void *job)
 		thread_pool__job_push_locked(job);
 	mutex_unlock(&jobinfo->mutex);
 
+	mutex_lock(&job_mutex);
 	pthread_cond_signal(&job_cond);
+	mutex_unlock(&job_mutex);
 }