Remove the @refcnt argument, because it has side-effects, and arguments with
side-effects are not skipped by the jump over disabled instrumentation and are
executed even when the tracepoint is disabled.
This was also causing a GPF as found by Randy Dunlap:
Subject: 2.6.33 GP fault only when built with tracing
LKML-Reference: <
4BA2B69D.
3000309@oracle.com>
Note, the current 2.6.34-rc has a fix for the actual cause of the GPF,
but this fixes one of its triggers.
Tested-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <
4BA97FA7.
6040406@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
if (module) {
preempt_disable();
__this_cpu_inc(module->refptr->count);
if (module) {
preempt_disable();
__this_cpu_inc(module->refptr->count);
- trace_module_get(module, _THIS_IP_,
- __this_cpu_read(module->refptr->count));
+ trace_module_get(module, _THIS_IP_);
if (likely(module_is_live(module))) {
__this_cpu_inc(module->refptr->count);
if (likely(module_is_live(module))) {
__this_cpu_inc(module->refptr->count);
- trace_module_get(module, _THIS_IP_,
- __this_cpu_read(module->refptr->count));
+ trace_module_get(module, _THIS_IP_);
DECLARE_EVENT_CLASS(module_refcnt,
DECLARE_EVENT_CLASS(module_refcnt,
- TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
+ TP_PROTO(struct module *mod, unsigned long ip),
- TP_ARGS(mod, ip, refcnt),
TP_STRUCT__entry(
__field( unsigned long, ip )
TP_STRUCT__entry(
__field( unsigned long, ip )
TP_fast_assign(
__entry->ip = ip;
TP_fast_assign(
__entry->ip = ip;
- __entry->refcnt = refcnt;
+ __entry->refcnt = __this_cpu_read(mod->refptr->count);
__assign_str(name, mod->name);
),
__assign_str(name, mod->name);
),
DEFINE_EVENT(module_refcnt, module_get,
DEFINE_EVENT(module_refcnt, module_get,
- TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
+ TP_PROTO(struct module *mod, unsigned long ip),
- TP_ARGS(mod, ip, refcnt)
);
DEFINE_EVENT(module_refcnt, module_put,
);
DEFINE_EVENT(module_refcnt, module_put,
- TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
+ TP_PROTO(struct module *mod, unsigned long ip),
- TP_ARGS(mod, ip, refcnt)
);
TRACE_EVENT(module_request,
);
TRACE_EVENT(module_request,
preempt_disable();
__this_cpu_dec(module->refptr->count);
preempt_disable();
__this_cpu_dec(module->refptr->count);
- trace_module_put(module, _RET_IP_,
- __this_cpu_read(module->refptr->count));
+ trace_module_put(module, _RET_IP_);
/* Maybe they're waiting for us to drop reference? */
if (unlikely(!module_is_live(module)))
wake_up_process(module->waiter);
/* Maybe they're waiting for us to drop reference? */
if (unlikely(!module_is_live(module)))
wake_up_process(module->waiter);