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tracing/fastboot: get the initcall name before it disappears

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After some initcall traces, some initcall names may be inconsistent.
That's because these functions will disappear from the .init section
and also their name from the symbols table.

So we have to copy the name of the function in a buffer large enough
during the trace appending. It is not costly for the ring_buffer because
the number of initcall entries is commonly not really large.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker
2008-10-02 13:26:05 +02:00
committed by Ingo Molnar
parent cb5ab74204
commit 5601020feb
3 changed files with 15 additions and 9 deletions
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3
init/main.c
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@@ -712,7 +712,6 @@ int do_one_initcall(initcall_t fn)
if (initcall_debug) {
it.caller = task_pid_nr(current);
it.func = fn;
printk("calling %pF @ %i\n", fn, it.caller);
it.calltime = ktime_get();
}
@@ -725,7 +724,7 @@ int do_one_initcall(initcall_t fn)
it.duration = (unsigned long long) delta.tv64 >> 20;
printk("initcall %pF returned %d after %Ld msecs\n", fn,
it.result, it.duration);
trace_boot(&it);
trace_boot(&it, fn);
}
msgbuf[0] = 0;