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
