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linux-sg2042
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markers: fix unchecked format 

when the second, third... probe is registered, its format is
not checked, this patch fixes it.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2008-10-08 10:23:36 +08:00 committed by Ingo Molnar
parent 53c8c8fdfd
commit 48043bcdf8
1 changed files with 9 additions and 3 deletions
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12
kernel/marker.c
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@ -653,11 +653,17 @@ int marker_probe_register(const char *name, const char *format,
entry = get_marker(name); entry = get_marker(name);
if (!entry) { if (!entry) {
entry = add_marker(name, format); entry = add_marker(name, format);
if (IS_ERR(entry)) { if (IS_ERR(entry))
ret = PTR_ERR(entry); ret = PTR_ERR(entry);
} else if (format) {
if (!entry->format)
ret = marker_set_format(&entry, format);
else if (strcmp(entry->format, format))
ret = -EPERM;
}
if (ret)
goto end; goto end;
}
}
/* /*
* If we detect that a call_rcu is pending for this marker, * If we detect that a call_rcu is pending for this marker,
* make sure it's executed now. * make sure it's executed now.