On 10.06.21 09:29, Philippe Gerum via Xenomai wrote: > From: Philippe Gerum <[email protected]> > > Signed-off-by: Philippe Gerum <[email protected]> > --- > kernel/trace/trace_preemptirq.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c > index 261ea4101d018ac..2b4110cf6ea2824 100644 > --- a/kernel/trace/trace_preemptirq.c > +++ b/kernel/trace/trace_preemptirq.c > @@ -124,6 +124,8 @@ void trace_hardirqs_off_pipelined(void) > if (running_inband()) > trace_hardirqs_off(); > } > +EXPORT_SYMBOL(trace_hardirqs_off_pipelined); > +NOKPROBE_SYMBOL(trace_hardirqs_off_pipelined); > > void trace_hardirqs_on_pipelined(void) > { > @@ -142,6 +144,8 @@ void trace_hardirqs_on_pipelined(void) > unstall_inband_nocheck(); > } > } > +EXPORT_SYMBOL(trace_hardirqs_on_pipelined); > +NOKPROBE_SYMBOL(trace_hardirqs_on_pipelined); > > #else > > @@ -149,11 +153,15 @@ void trace_hardirqs_off_pipelined(void) > { > trace_hardirqs_off(); > } > +EXPORT_SYMBOL(trace_hardirqs_off_pipelined); > +NOKPROBE_SYMBOL(trace_hardirqs_off_pipelined); > > void trace_hardirqs_on_pipelined(void) > { > trace_hardirqs_on(); > } > +EXPORT_SYMBOL(trace_hardirqs_on_pipelined); > +NOKPROBE_SYMBOL(trace_hardirqs_on_pipelined); > > #endif > >
How about "blacklist pipeline tracepoints for kprobe" as subject? The symbols were already exported, but not in the right way. The kernel says "Probing (trapping) such functions can cause a recursive trap (e.g. double fault) or the nested probe handler may never be called. Kprobes manages such functions as a blacklist." Jan -- Siemens AG, T RDA IOT Corporate Competence Center Embedded Linux
