Hi Steve, Looks ok to me. Acked-by: Tom Zanussi <zanussi@xxxxxxxxxx> Thanks, Tom On Mon, 2020-10-12 at 10:15 -0400, Steven Rostedt wrote: > Tom, > > Can you ack this patch for me? > > -- Steve > > > On Fri, 9 Oct 2020 15:05:23 -0700 > Axel Rasmussen <axelrasmussen@xxxxxxxxxx> wrote: > > > It's common [1] to define tracepoint fields as "bool" when they > > contain > > a true / false value. Currently, defining a synthetic event with a > > "bool" field yields EINVAL. It's possible to work around this by > > using > > e.g. u8 (assuming sizeof(bool) is 1, and bool is unsigned; if > > either of > > these properties don't match, you get EINVAL [2]). > > > > Supporting "bool" explicitly makes hooking this up easier and more > > portable for userspace. > > > > [1]: grep -r "bool" include/trace/events/ > > [2]: check_synth_field() in kernel/trace/trace_events_hist.c > > > > Acked-by: Michel Lespinasse <walken@xxxxxxxxxx> > > Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx> > > --- > > kernel/trace/trace_events_synth.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/kernel/trace/trace_events_synth.c > > b/kernel/trace/trace_events_synth.c > > index 8e1974fbad0e..8f94c84349a6 100644 > > --- a/kernel/trace/trace_events_synth.c > > +++ b/kernel/trace/trace_events_synth.c > > @@ -234,6 +234,8 @@ static int synth_field_size(char *type) > > size = sizeof(long); > > else if (strcmp(type, "unsigned long") == 0) > > size = sizeof(unsigned long); > > + else if (strcmp(type, "bool") == 0) > > + size = sizeof(bool); > > else if (strcmp(type, "pid_t") == 0) > > size = sizeof(pid_t); > > else if (strcmp(type, "gfp_t") == 0) > > @@ -276,6 +278,8 @@ static const char *synth_field_fmt(char *type) > > fmt = "%ld"; > > else if (strcmp(type, "unsigned long") == 0) > > fmt = "%lu"; > > + else if (strcmp(type, "bool") == 0) > > + fmt = "%d"; > > else if (strcmp(type, "pid_t") == 0) > > fmt = "%d"; > > else if (strcmp(type, "gfp_t") == 0) > > -- > > 2.28.0.1011.ga647a8990f-goog > >
