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rcutorture: Properly set rcu_fwds for OOM handling 

The conversion of rcu_fwds to dynamic allocation failed to actually
allocate the required structure.  This commit therefore allocates it,
frees it, and updates rcu_fwds accordingly.  While in the area, it
abstracts the cleanup actions into rcu_torture_fwd_prog_cleanup().

Fixes: 5155be9994 ("rcutorture: Dynamically allocate rcu_fwds structure")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-07-19 14:40:31 -07:00
parent 5461808889
commit c8fa637147
1 changed files with 12 additions and 1 deletions
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13
kernel/rcu/rcutorture.c
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@ -2148,9 +2148,20 @@ static int __init rcu_torture_fwd_prog_init(void)
return -ENOMEM;
spin_lock_init(&rfp->rcu_fwd_lock);
rfp->rcu_fwd_cb_tail = &rfp->rcu_fwd_cb_head;
rcu_fwds = rfp;
return torture_create_kthread(rcu_torture_fwd_prog, rfp, fwd_prog_task);
}
static void rcu_torture_fwd_prog_cleanup(void)
{
struct rcu_fwd *rfp;
torture_stop_kthread(rcu_torture_fwd_prog, fwd_prog_task);
rfp = rcu_fwds;
rcu_fwds = NULL;
kfree(rfp);
}
/* Callback function for RCU barrier testing. */
static void rcu_torture_barrier_cbf(struct rcu_head *rcu)
{
@ -2448,7 +2459,7 @@ rcu_torture_cleanup(void)
show_rcu_gp_kthreads();
rcu_torture_read_exit_cleanup();
rcu_torture_barrier_cleanup();
torture_stop_kthread(rcu_torture_fwd_prog, fwd_prog_task);
rcu_torture_fwd_prog_cleanup();
torture_stop_kthread(rcu_torture_stall, stall_task);
torture_stop_kthread(rcu_torture_writer, writer_task);