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author | Ingo Molnar <mingo@elte.hu> | 2008-11-10 09:16:27 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-10 09:16:27 +0100 |
commit | 4ecd33d930591d41fe356160593a9076467b961c (patch) | |
tree | b9051a334540bbce38db1b2b03cebb4cf1d51f73 /kernel/tracepoint.c | |
parent | 7d5a78cd98c3a5eb83bd6a061c5ea6ef1e9b8fcb (diff) | |
parent | f7160c7573615ec82c691e294cf80d920b5d588d (diff) |
Merge commit 'v2.6.28-rc4' into x86/apic
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 f2b7c28a4708..af8c85664882 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); |