tree 91e75d42c41af8d39b73c5cc8487c1b75c55e58d
parent db537c135589c59db39c1c160e803f267a10a38a
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1345933660 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1348011150 -0700

rcu: Prevent initialization race in rcutorture kthreads

When you do something like "t = kthread_run(...)", it is possible that
the kthread will start running before the assignment to "t" happens.
If the child kthread expects to find a pointer to its task_struct in "t",
it will then be fatally disappointed.  This commit therefore switches
such cases to kthread_create() followed by wake_up_process(), guaranteeing
that the assignment happens before the child kthread starts running.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>