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authorSteven Rostedt <srostedt@redhat.com>2009-04-10 14:53:50 -0400
committerSteven Rostedt <rostedt@goodmis.org>2009-04-14 12:58:03 -0400
commit6d723736e472f7a0cd5b62c84152fceead241328 (patch)
tree8df2f6c47ebdfdeb8979758c877a5abbd9c06aef /kernel/module.c
parent17c873ec280a03894bc718af817f7f24fa787ae1 (diff)
downloadop-kernel-dev-6d723736e472f7a0cd5b62c84152fceead241328.zip
op-kernel-dev-6d723736e472f7a0cd5b62c84152fceead241328.tar.gz
tracing/events: add support for modules to TRACE_EVENT
Impact: allow modules to add TRACE_EVENTS on load This patch adds the final hooks to allow modules to use the TRACE_EVENT macro. A notifier and a data structure are used to link the TRACE_EVENTs defined in the module to connect them with the ftrace event tracing system. It also adds the necessary automated clean ups to the trace events when a module is removed. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/module.c')
-rw-r--r--kernel/module.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c
index e797812..a039470 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -18,6 +18,7 @@
*/
#include <linux/module.h>
#include <linux/moduleloader.h>
+#include <linux/ftrace_event.h>
#include <linux/init.h>
#include <linux/kallsyms.h>
#include <linux/fs.h>
@@ -2172,6 +2173,12 @@ static noinline struct module *load_module(void __user *umod,
sizeof(*mod->tracepoints),
&mod->num_tracepoints);
#endif
+#ifdef CONFIG_EVENT_TRACING
+ mod->trace_events = section_objs(hdr, sechdrs, secstrings,
+ "_ftrace_events",
+ sizeof(*mod->trace_events),
+ &mod->num_trace_events);
+#endif
#ifdef CONFIG_MODVERSIONS
if ((mod->num_syms && !mod->crcs)
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