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-rw-r--r--kernel/marker.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/marker.c b/kernel/marker.c
index 50effc01d9a2..48a4ea5afffd 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -698,14 +698,12 @@ int marker_probe_unregister(const char *name,
698{ 698{
699 struct marker_entry *entry; 699 struct marker_entry *entry;
700 struct marker_probe_closure *old; 700 struct marker_probe_closure *old;
701 int ret = 0; 701 int ret = -ENOENT;
702 702
703 mutex_lock(&markers_mutex); 703 mutex_lock(&markers_mutex);
704 entry = get_marker(name); 704 entry = get_marker(name);
705 if (!entry) { 705 if (!entry)
706 ret = -ENOENT;
707 goto end; 706 goto end;
708 }
709 if (entry->rcu_pending) 707 if (entry->rcu_pending)
710 rcu_barrier(); 708 rcu_barrier();
711 old = marker_entry_remove_probe(entry, probe, probe_private); 709 old = marker_entry_remove_probe(entry, probe, probe_private);
@@ -713,12 +711,15 @@ int marker_probe_unregister(const char *name,
713 marker_update_probes(); /* may update entry */ 711 marker_update_probes(); /* may update entry */
714 mutex_lock(&markers_mutex); 712 mutex_lock(&markers_mutex);
715 entry = get_marker(name); 713 entry = get_marker(name);
714 if (!entry)
715 goto end;
716 entry->oldptr = old; 716 entry->oldptr = old;
717 entry->rcu_pending = 1; 717 entry->rcu_pending = 1;
718 /* write rcu_pending before calling the RCU callback */ 718 /* write rcu_pending before calling the RCU callback */
719 smp_wmb(); 719 smp_wmb();
720 call_rcu(&entry->rcu, free_old_closure); 720 call_rcu(&entry->rcu, free_old_closure);
721 remove_marker(name); /* Ignore busy error message */ 721 remove_marker(name); /* Ignore busy error message */
722 ret = 0;
722end: 723end:
723 mutex_unlock(&markers_mutex); 724 mutex_unlock(&markers_mutex);
724 return ret; 725 return ret;