On 2024-10-04 00:36, Steven Rostedt wrote:
On Thu, 3 Oct 2024 11:16:36 -0400
Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> wrote:
diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h
index 0228d9ed94a3..e0d4850b0d77 100644
--- a/include/trace/trace_events.h
+++ b/include/trace/trace_events.h
@@ -446,6 +446,7 @@ __DECLARE_EVENT_CLASS(call, PARAMS(proto), PARAMS(args), PARAMS(tstruct), \
static notrace void \
trace_event_raw_event_##call(void *__data, proto) \
{ \
+ might_fault(); \
I don't think we want "might_fault()" here, as this is called for every
tracepoint that is created by the TRACE_EVENT() macro. That means, there's
going to be plenty of locations this gets called at that do not allow faults.
Here is the full context where this line applies:
#undef DECLARE_EVENT_SYSCALL_CLASS
#define DECLARE_EVENT_SYSCALL_CLASS(call, proto, args, tstruct, assign, print) \
__DECLARE_EVENT_CLASS(call, PARAMS(proto), PARAMS(args), PARAMS(tstruct), \
PARAMS(assign), PARAMS(print)) \
static notrace void \
trace_event_raw_event_##call(void *__data, proto) \
{ \
might_fault(); \
guard(preempt_notrace)(); \
do_trace_event_raw_event_##call(__data, args); \
}
Not an issue, since it's only for syscall tracepoints.
Thanks,
Mathieu
-- Steve
guard(preempt_notrace)(); \
do_trace_event_raw_event_##call(__data, args); \
}
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
