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authorLai Jiangshan <laijs@cn.fujitsu.com>2009-03-06 17:21:47 +0100
committerIngo Molnar <mingo@elte.hu>2009-03-06 17:59:11 +0100
commit1427cdf0592368bdec57276edaf714040ee8744f (patch)
tree4b214ee49643db383328cf53a31959eb0627a167 /include
parent546e5354a6e4ec760ac03ef1148e9a4762abb5f5 (diff)
downloadop-kernel-dev-1427cdf0592368bdec57276edaf714040ee8744f.zip
op-kernel-dev-1427cdf0592368bdec57276edaf714040ee8744f.tar.gz
tracing: infrastructure for supporting binary record
Impact: save on memory for tracing Current tracers are typically using a struct(like struct ftrace_entry, struct ctx_switch_entry, struct special_entr etc...)to record a binary event. These structs can only record a their own kind of events. A new kind of tracer need a new struct and a lot of code too handle it. So we need a generic binary record for events. This infrastructure is for this purpose. [fweisbec@gmail.com: rebase against latest -tip, make it safe while sched tracing as reported by Steven Rostedt] Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1236356510-8381-3-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ftrace.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 4987694..1c9cdca 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -223,6 +223,9 @@ extern int ftrace_make_nop(struct module *mod,
*/
extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr);
+#ifdef CONFIG_TRACE_BPRINTK
+extern int trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
+#endif
/* May be defined in arch */
extern int ftrace_arch_read_dyn_info(char *buf, int size);
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