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authorIngo Molnar <mingo@elte.hu>2009-08-26 08:29:02 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-26 08:29:02 +0200
commit35dce1a99d010f3d738af4ce1b9b77302fdfe69c (patch)
treee34a37de965a79a2ae301de4d0557f500111dde6 /include/linux/tracepoint.h
parent7cb2e3ee2aeec5b83ecadba929a2dc575dd4008f (diff)
parent1c569f0264ea629c10bbab471dd0626ce4d3f19f (diff)
downloadlinux-linaro-stable-35dce1a99d010f3d738af4ce1b9b77302fdfe69c.tar.gz
Merge branch 'tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/core
Conflicts: include/linux/tracepoint.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/tracepoint.h')
-rw-r--r--include/linux/tracepoint.h46
1 files changed, 18 insertions, 28 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 0341f2e2698a..63a3f7a80580 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -23,6 +23,8 @@ struct tracepoint;
struct tracepoint {
const char *name; /* Tracepoint name */
int state; /* State. */
+ void (*regfunc)(void);
+ void (*unregfunc)(void);
void **funcs;
} __attribute__((aligned(32))); /*
* Aligned on 32 bytes because it is
@@ -60,10 +62,8 @@ struct tracepoint {
* Make sure the alignment of the structure in the __tracepoints section will
* not add unwanted padding between the beginning of the section and the
* structure. Force alignment to the same alignment as the section start.
- * An optional set of (un)registration functions can be passed to perform any
- * additional (un)registration work.
*/
-#define DECLARE_TRACE_WITH_CALLBACK(name, proto, args, reg, unreg) \
+#define DECLARE_TRACE(name, proto, args) \
extern struct tracepoint __tracepoint_##name; \
static inline void trace_##name(proto) \
{ \
@@ -73,36 +73,23 @@ struct tracepoint {
} \
static inline int register_trace_##name(void (*probe)(proto)) \
{ \
- int ret; \
- void (*func)(void) = reg; \
- \
- ret = tracepoint_probe_register(#name, (void *)probe); \
- if (func && !ret) \
- func(); \
- return ret; \
+ return tracepoint_probe_register(#name, (void *)probe); \
} \
static inline int unregister_trace_##name(void (*probe)(proto)) \
{ \
- int ret; \
- void (*func)(void) = unreg; \
- \
- ret = tracepoint_probe_unregister(#name, (void *)probe);\
- if (func && !ret) \
- func(); \
- return ret; \
+ return tracepoint_probe_unregister(#name, (void *)probe);\
}
-#define DECLARE_TRACE(name, proto, args) \
- DECLARE_TRACE_WITH_CALLBACK(name, TP_PROTO(proto), TP_ARGS(args),\
- NULL, NULL);
-
-#define DEFINE_TRACE(name) \
+#define DEFINE_TRACE_FN(name, reg, unreg) \
static const char __tpstrtab_##name[] \
__attribute__((section("__tracepoints_strings"))) = #name; \
struct tracepoint __tracepoint_##name \
__attribute__((section("__tracepoints"), aligned(32))) = \
- { __tpstrtab_##name, 0, NULL }
+ { __tpstrtab_##name, 0, reg, unreg, NULL }
+
+#define DEFINE_TRACE(name) \
+ DEFINE_TRACE_FN(name, NULL, NULL);
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name) \
EXPORT_SYMBOL_GPL(__tracepoint_##name)
@@ -113,7 +100,7 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin,
struct tracepoint *end);
#else /* !CONFIG_TRACEPOINTS */
-#define DECLARE_TRACE_WITH_CALLBACK(name, proto, args, reg, unreg) \
+#define DECLARE_TRACE(name, proto, args) \
static inline void _do_trace_##name(struct tracepoint *tp, proto) \
{ } \
static inline void trace_##name(proto) \
@@ -127,10 +114,7 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin,
return -ENOSYS; \
}
-#define DECLARE_TRACE(name, proto, args) \
- DECLARE_TRACE_WITH_CALLBACK(name, TP_PROTO(proto), TP_ARGS(args),\
- NULL, NULL);
-
+#define DEFINE_TRACE_FN(name, reg, unreg)
#define DEFINE_TRACE(name)
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name)
#define EXPORT_TRACEPOINT_SYMBOL(name)
@@ -291,9 +275,15 @@ static inline void tracepoint_synchronize_unregister(void)
* can also by used by generic instrumentation like SystemTap), and
* it is also used to expose a structured trace record in
* /sys/kernel/debug/tracing/events/.
+ *
+ * A set of (un)registration functions can be passed to the variant
+ * TRACE_EVENT_FN to perform any (un)registration work.
*/
#define TRACE_EVENT(name, proto, args, struct, assign, print) \
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define TRACE_EVENT_FN(name, proto, args, struct, \
+ assign, print, reg, unreg) \
+ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
#endif /* ifdef TRACE_EVENT (see note above) */