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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-05-25 08:51:48 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-08-17 07:26:05 -0700
commitccdd29ffffa7246cb359b9408772858a15fc4ea5 (patch)
treec3267c792e96692f57e28f740ff42a4a1395487b /kernel/exit.c
parent7e42776d5ed1fe9a941ed8876c5d15cd7cf5d89f (diff)
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rcu: Create reasonable API for do_exit() TASKS_RCU processing
Currently, the exit-time support for TASKS_RCU is open-coded in do_exit(). This commit creates exit_tasks_rcu_start() and exit_tasks_rcu_finish() APIs for do_exit() use. This has the benefit of confining the use of the tasks_rcu_exit_srcu variable to one file, allowing it to become static. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index c5548faa9f37..d297c525f188 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -764,7 +764,6 @@ void __noreturn do_exit(long code)
{
struct task_struct *tsk = current;
int group_dead;
- TASKS_RCU(int tasks_rcu_i);
profile_task_exit(tsk);
kcov_task_exit(tsk);
@@ -881,9 +880,7 @@ void __noreturn do_exit(long code)
*/
flush_ptrace_hw_breakpoint(tsk);
- TASKS_RCU(preempt_disable());
- TASKS_RCU(tasks_rcu_i = __srcu_read_lock(&tasks_rcu_exit_srcu));
- TASKS_RCU(preempt_enable());
+ exit_tasks_rcu_start();
exit_notify(tsk, group_dead);
proc_exit_connector(tsk);
mpol_put_task_policy(tsk);
@@ -918,7 +915,7 @@ void __noreturn do_exit(long code)
if (tsk->nr_dirtied)
__this_cpu_add(dirty_throttle_leaks, tsk->nr_dirtied);
exit_rcu();
- TASKS_RCU(__srcu_read_unlock(&tasks_rcu_exit_srcu, tasks_rcu_i));
+ exit_tasks_rcu_finish();
do_task_dead();
}