diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-31 00:38:21 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-31 00:38:21 +0100 |
commit | e1e302d8a9ab06ba8d7d5ec503d8996e6cf0eca4 (patch) | |
tree | 6a6c805fdfd6a2f6433956cbee348b2c3a277784 /kernel/tracepoint.c | |
parent | 944ac4259e39801c843a915c3da8194ac9af0440 (diff) | |
parent | 7f82f000ed030d1108b4de47d9e2d556092980c6 (diff) |
Merge branch 'linus' into tracing/ftrace
Diffstat (limited to 'kernel/tracepoint.c')
-rw-r--r-- | kernel/tracepoint.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index f2b7c28a470..af8c8566488 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -131,6 +131,9 @@ tracepoint_entry_remove_probe(struct tracepoint_entry *entry, void *probe) old = entry->funcs; + if (!old) + return NULL; + debug_print_probes(entry); /* (N -> M), (N > 1, M >= 0) probes */ for (nr_probes = 0; old[nr_probes]; nr_probes++) { @@ -388,6 +391,11 @@ int tracepoint_probe_unregister(const char *name, void *probe) if (entry->rcu_pending) rcu_barrier_sched(); old = tracepoint_entry_remove_probe(entry, probe); + if (!old) { + printk(KERN_WARNING "Warning: Trying to unregister a probe" + "that doesn't exist\n"); + goto end; + } mutex_unlock(&tracepoints_mutex); tracepoint_update_probes(); /* may update entry */ mutex_lock(&tracepoints_mutex); |