#include <linux/cpumask.h>
#include <linux/rcupdate.h>
#include <linux/tracepoint-defs.h>
+#include <linux/static_call.h>
struct module;
struct tracepoint;
extern void syscall_unregfunc(void);
#endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */
+#ifndef PARAMS
#define PARAMS(args...) args
+#endif
#define TRACE_DEFINE_ENUM(x)
#define TRACE_DEFINE_SIZEOF(x)
#ifdef TRACEPOINTS_ENABLED
+#ifdef CONFIG_HAVE_STATIC_CALL
+#define __DO_TRACE_CALL(name) static_call(tp_func_##name)
+#else
+#define __DO_TRACE_CALL(name) __tracepoint_iter_##name
+#endif /* CONFIG_HAVE_STATIC_CALL */
+
/*
* it_func[0] is never NULL because there is at least one element in the array
* when the array itself is non NULL.
* has a "void" prototype, then it is invalid to declare a function
* as "(void *, void)".
*/
-#define __DO_TRACE(tp, proto, args, cond, rcuidle) \
+#define __DO_TRACE(name, proto, args, cond, rcuidle) \
do { \
struct tracepoint_func *it_func_ptr; \
- void *it_func; \
- void *__data; \
int __maybe_unused __idx = 0; \
+ void *__data; \
\
if (!(cond)) \
return; \
rcu_irq_enter_irqson(); \
} \
\
- it_func_ptr = rcu_dereference_raw((tp)->funcs); \
- \
+ it_func_ptr = \
+ rcu_dereference_raw((&__tracepoint_##name)->funcs); \
if (it_func_ptr) { \
- do { \
- it_func = (it_func_ptr)->func; \
- __data = (it_func_ptr)->data; \
- ((void(*)(proto))(it_func))(args); \
- } while ((++it_func_ptr)->func); \
+ __data = (it_func_ptr)->data; \
+ __DO_TRACE_CALL(name)(args); \
} \
\
if (rcuidle) { \
static inline void trace_##name##_rcuidle(proto) \
{ \
if (static_key_false(&__tracepoint_##name.key)) \
- __DO_TRACE(&__tracepoint_##name, \
+ __DO_TRACE(name, \
TP_PROTO(data_proto), \
TP_ARGS(data_args), \
TP_CONDITION(cond), 1); \
* poking RCU a bit.
*/
#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
+ extern int __tracepoint_iter_##name(data_proto); \
+ DECLARE_STATIC_CALL(tp_func_##name, __tracepoint_iter_##name); \
extern struct tracepoint __tracepoint_##name; \
static inline void trace_##name(proto) \
{ \
if (static_key_false(&__tracepoint_##name.key)) \
- __DO_TRACE(&__tracepoint_##name, \
+ __DO_TRACE(name, \
TP_PROTO(data_proto), \
TP_ARGS(data_args), \
TP_CONDITION(cond), 0); \
* structures, so we create an array of pointers that will be used for iteration
* on the tracepoints.
*/
-#define DEFINE_TRACE_FN(name, reg, unreg) \
- static const char __tpstrtab_##name[] \
- __section(__tracepoints_strings) = #name; \
- struct tracepoint __tracepoint_##name __used \
- __section(__tracepoints) = \
- { __tpstrtab_##name, STATIC_KEY_INIT_FALSE, reg, unreg, NULL };\
- __TRACEPOINT_ENTRY(name);
+#define DEFINE_TRACE_FN(_name, _reg, _unreg, proto, args) \
+ static const char __tpstrtab_##_name[] \
+ __section(__tracepoints_strings) = #_name; \
+ extern struct static_call_key STATIC_CALL_KEY(tp_func_##_name); \
+ int __tracepoint_iter_##_name(void *__data, proto); \
+ struct tracepoint __tracepoint_##_name __used \
+ __section(__tracepoints) = { \
+ .name = __tpstrtab_##_name, \
+ .key = STATIC_KEY_INIT_FALSE, \
+ .static_call_key = &STATIC_CALL_KEY(tp_func_##_name), \
+ .static_call_tramp = STATIC_CALL_TRAMP_ADDR(tp_func_##_name), \
+ .iterator = &__tracepoint_iter_##_name, \
+ .regfunc = _reg, \
+ .unregfunc = _unreg, \
+ .funcs = NULL }; \
+ __TRACEPOINT_ENTRY(_name); \
+ int __tracepoint_iter_##_name(void *__data, proto) \
+ { \
+ struct tracepoint_func *it_func_ptr; \
+ void *it_func; \
+ \
+ it_func_ptr = \
+ rcu_dereference_raw((&__tracepoint_##_name)->funcs); \
+ do { \
+ it_func = (it_func_ptr)->func; \
+ __data = (it_func_ptr)->data; \
+ ((void(*)(void *, proto))(it_func))(__data, args); \
+ } while ((++it_func_ptr)->func); \
+ return 0; \
+ } \
+ DEFINE_STATIC_CALL(tp_func_##_name, __tracepoint_iter_##_name);
-#define DEFINE_TRACE(name) \
- DEFINE_TRACE_FN(name, NULL, NULL);
+#define DEFINE_TRACE(name, proto, args) \
+ DEFINE_TRACE_FN(name, NULL, NULL, PARAMS(proto), PARAMS(args));
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name) \
- EXPORT_SYMBOL_GPL(__tracepoint_##name)
+ EXPORT_SYMBOL_GPL(__tracepoint_##name); \
+ EXPORT_SYMBOL_GPL(__tracepoint_iter_##name); \
+ EXPORT_STATIC_CALL_GPL(tp_func_##name)
#define EXPORT_TRACEPOINT_SYMBOL(name) \
- EXPORT_SYMBOL(__tracepoint_##name)
+ EXPORT_SYMBOL(__tracepoint_##name); \
+ EXPORT_SYMBOL(__tracepoint_iter_##name); \
+ EXPORT_STATIC_CALL(tp_func_##name)
+
#else /* !TRACEPOINTS_ENABLED */
#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
return false; \
}
-#define DEFINE_TRACE_FN(name, reg, unreg)
-#define DEFINE_TRACE(name)
+#define DEFINE_TRACE_FN(name, reg, unreg, proto, args)
+#define DEFINE_TRACE(name, proto, args)
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name)
#define EXPORT_TRACEPOINT_SYMBOL(name)
#undef TRACE_EVENT
#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
- DEFINE_TRACE(name)
+ DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
#undef TRACE_EVENT_CONDITION
#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
#undef TRACE_EVENT_FN
#define TRACE_EVENT_FN(name, proto, args, tstruct, \
assign, print, reg, unreg) \
- DEFINE_TRACE_FN(name, reg, unreg)
+ DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
#undef TRACE_EVENT_FN_COND
#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
assign, print, reg, unreg) \
- DEFINE_TRACE_FN(name, reg, unreg)
+ DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
#undef TRACE_EVENT_NOP
#define TRACE_EVENT_NOP(name, proto, args, struct, assign, print)
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
- DEFINE_TRACE(name)
+ DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
#undef DEFINE_EVENT_FN
#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
- DEFINE_TRACE_FN(name, reg, unreg)
+ DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_TRACE(name)
+ DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
#undef DEFINE_EVENT_CONDITION
#define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
#undef DECLARE_TRACE
#define DECLARE_TRACE(name, proto, args) \
- DEFINE_TRACE(name)
+ DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
#undef TRACE_INCLUDE
#undef __TRACE_INCLUDE