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| author | Steven Rostedt <srostedt@redhat.com> | 2009-04-10 14:53:50 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-04-14 12:58:03 -0400 |
| commit | 6d723736e472f7a0cd5b62c84152fceead241328 (patch) | |
| tree | 8df2f6c47ebdfdeb8979758c877a5abbd9c06aef /kernel/module.c | |
| parent | 17c873ec280a03894bc718af817f7f24fa787ae1 (diff) | |
| download | lwn-6d723736e472f7a0cd5b62c84152fceead241328.tar.gz lwn-6d723736e472f7a0cd5b62c84152fceead241328.zip | |
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.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c index e797812a4d95..a0394706f10c 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) |