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>
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@ -653,11 +653,17 @@ int marker_probe_register(const char *name, const char *format,
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entry = get_marker(name);
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if (!entry) {
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entry = add_marker(name, format);
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if (IS_ERR(entry)) {
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if (IS_ERR(entry))
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ret = PTR_ERR(entry);
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} else if (format) {
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if (!entry->format)
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ret = marker_set_format(&entry, format);
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else if (strcmp(entry->format, format))
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ret = -EPERM;
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}
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if (ret)
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goto end;
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}
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}
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/*
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* If we detect that a call_rcu is pending for this marker,
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* make sure it's executed now.
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