diff options
author | Wu Fengguang <fengguang.wu@intel.com> | 2008-11-27 03:14:44 -0500 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-11-28 10:47:41 -0500 |
commit | a838c2ec6ea1f18431da74dfe4978c57355b95f3 (patch) | |
tree | c51852ff62ec383c27e21f318f5e3180f141b885 /include/linux | |
parent | c7cc77307669336a08928ab8668bdb3f3bcc021b (diff) |
markers: comment marker_synchronize_unregister() on data dependency
Add document and comments on marker_synchronize_unregister(): it
should be called before freeing resources that the probes depend on.
Based on comments from Lai Jiangshan and Mathieu Desnoyers.
Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/marker.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/marker.h b/include/linux/marker.h index 34c14bc957f5..b85e74ca782f 100644 --- a/include/linux/marker.h +++ b/include/linux/marker.h | |||
@@ -211,8 +211,10 @@ extern void *marker_get_private_data(const char *name, marker_probe_func *probe, | |||
211 | 211 | ||
212 | /* | 212 | /* |
213 | * marker_synchronize_unregister must be called between the last marker probe | 213 | * marker_synchronize_unregister must be called between the last marker probe |
214 | * unregistration and the end of module exit to make sure there is no caller | 214 | * unregistration and the first one of |
215 | * executing a probe when it is freed. | 215 | * - the end of module exit function |
216 | * - the free of any resource used by the probes | ||
217 | * to ensure the code and data are valid for any possibly running probes. | ||
216 | */ | 218 | */ |
217 | #define marker_synchronize_unregister() synchronize_sched() | 219 | #define marker_synchronize_unregister() synchronize_sched() |
218 | 220 | ||