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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-09-29 11:05:13 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:38:26 +0200
commite98d0eabef2748d88fa58760d104e8e68517406b (patch)
tree6a7782971bdd598380eab43c0cb9aefbb2c6e2d6 /include
parent9a1e9693f534174945154197fec4ec92f168ce21 (diff)
downloadop-kernel-dev-e98d0eabef2748d88fa58760d104e8e68517406b.zip
op-kernel-dev-e98d0eabef2748d88fa58760d104e8e68517406b.tar.gz
markers: marker_synchronize_unregister()
Create marker_synchronize_unregister() which must be called before the end of exit() to make sure every probe callers have exited the non preemptible section and thus are not executing the probe code anymore. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/marker.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/marker.h b/include/linux/marker.h
index 1290653..889196c 100644
--- a/include/linux/marker.h
+++ b/include/linux/marker.h
@@ -160,4 +160,11 @@ extern int marker_probe_unregister_private_data(marker_probe_func *probe,
extern void *marker_get_private_data(const char *name, marker_probe_func *probe,
int num);
+/*
+ * marker_synchronize_unregister must be called between the last marker probe
+ * unregistration and the end of module exit to make sure there is no caller
+ * executing a probe when it is freed.
+ */
+#define marker_synchronize_unregister() synchronize_sched()
+
#endif
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