[PATCH tip/core/rcu 20/41] kprobes: eplace synchronize_sched() with synchronize_rcu()

[Paul E. McKenney]

Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu().  This commit therefore makes this change.

Signed-off-by: Paul E. McKenney <paul...@linux.ibm.com>
Cc: "Naveen N. Rao" <naveen.n....@linux.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamur...@intel.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Masami Hiramatsu <mhira...@kernel.org>
---
 kernel/kprobes.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 90e98e233647..08e31d863191 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -229,7 +229,7 @@ static int collect_garbage_slots(struct kprobe_insn_cache 
*c)
        struct kprobe_insn_page *kip, *next;
 
        /* Ensure no-one is interrupted on the garbages */
-       synchronize_sched();
+       synchronize_rcu();
 
        list_for_each_entry_safe(kip, next, &c->pages, list) {
                int i;
@@ -1382,7 +1382,7 @@ static int register_aggr_kprobe(struct kprobe *orig_p, 
struct kprobe *p)
                        if (ret) {
                                ap->flags |= KPROBE_FLAG_DISABLED;
                                list_del_rcu(&p->list);
-                               synchronize_sched();
+                               synchronize_rcu();
                        }
                }
        }
@@ -1597,7 +1597,7 @@ int register_kprobe(struct kprobe *p)
                ret = arm_kprobe(p);
                if (ret) {
                        hlist_del_rcu(&p->hlist);
-                       synchronize_sched();
+                       synchronize_rcu();
                        goto out;
                }
        }
@@ -1776,7 +1776,7 @@ void unregister_kprobes(struct kprobe **kps, int num)
                        kps[i]->addr = NULL;
        mutex_unlock(&kprobe_mutex);
 
-       synchronize_sched();
+       synchronize_rcu();
        for (i = 0; i < num; i++)
                if (kps[i]->addr)
                        __unregister_kprobe_bottom(kps[i]);
@@ -1966,7 +1966,7 @@ void unregister_kretprobes(struct kretprobe **rps, int 
num)
                        rps[i]->kp.addr = NULL;
        mutex_unlock(&kprobe_mutex);
 
-       synchronize_sched();
+       synchronize_rcu();
        for (i = 0; i < num; i++) {
                if (rps[i]->kp.addr) {
                        __unregister_kprobe_bottom(&rps[i]->kp);
-- 
2.17.1