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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-02-26 13:37:38 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-03-23 21:38:16 -0700
commitd6a6d1f38ce55aa5a7d8aab972176660b19fd7ab (patch)
treed7df976223802e2eda5fa641717ff568f47903c8 /include/linux/tracepoint.h
parent1f7dc3c002c02493219f7e6ee5930a30f7a57175 (diff)
downloadlinux-linaro-stable-d6a6d1f38ce55aa5a7d8aab972176660b19fd7ab.tar.gz
tracing: Do not add event files for modules that fail tracepoints
commit 45ab2813d40d88fc575e753c38478de242d03f88 upstream. If a module fails to add its tracepoints due to module tainting, do not create the module event infrastructure in the debugfs directory. As the events will not work and worse yet, they will silently fail, making the user wonder why the events they enable do not display anything. Having a warning on module load and the events not visible to the users will make the cause of the problem much clearer. Link: http://lkml.kernel.org/r/20140227154923.265882695@goodmis.org Fixes: 6d723736e472 "tracing/events: add support for modules to TRACE_EVENT" Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tracepoint.h')
-rw-r--r--include/linux/tracepoint.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index f8e084d0fc77..ba605015c4d8 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -60,6 +60,12 @@ struct tp_module {
unsigned int num_tracepoints;
struct tracepoint * const *tracepoints_ptrs;
};
+bool trace_module_has_bad_taint(struct module *mod);
+#else
+static inline bool trace_module_has_bad_taint(struct module *mod)
+{
+ return false;
+}
#endif /* CONFIG_MODULES */
struct tracepoint_iter {