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Commit 3bbc8db3 authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Steven Rostedt
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tracepoints: API doc update to tracepoint_probe_register() return value 

Describe the return values of tracepoint_probe_register(), including
-ENODEV added by commit:

Author: Steven Rostedt <rostedt@goodmis.org>

    tracing: Warn if a tracepoint is not set via debugfs

Link: http://lkml.kernel.org/r/1394499898-1537-2-git-send-email-mathieu.desnoyers@efficios.com



CC: Ingo Molnar <mingo@kernel.org>
CC: Frederic Weisbecker <fweisbec@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 4c11628a

kernel/tracepoint.c

+11 −1
Original line number Diff line number Diff line
@@ -378,7 +378,17 @@ tracepoint_add_probe(const char *name, void *probe, void *data) 
 * @probe: probe handler

 * @data: probe private data

 *

 * Returns 0 if ok, error value on error.

 * Returns:

 * - 0 if the probe was successfully registered, and tracepoint

 *   callsites are currently loaded for that probe,

 * - -ENODEV if the probe was successfully registered, but no tracepoint

 *   callsite is currently loaded for that probe,

 * - other negative error value on error.

 *

 * When tracepoint_probe_register() returns either 0 or -ENODEV,

 * parameters @name, @probe, and @data may be used by the tracepoint

 * infrastructure until the probe is unregistered.

 *

 * The probe address must at least be aligned on the architecture pointer size.

 */

int tracepoint_probe_register(const char *name, void *probe, void *data)