On Mon, 3 Mar 2014 19:17:32 +0100 Romain Izard <[email protected]> wrote:
> The replacement of the 'count' variable by two variables 'incs' and > 'decs' to resolve some race conditions during module unloading was done > in parallel with some cleanup in the trace subsystem, and was integrated > as a merge. > > Unfortunately, the formula for this replacement was wrong in the tracing > code, and the refcount in the traces was not usable as a result. > > Use 'count = incs - decs' to compute the user count. > > Signed-off-by: Romain Izard <[email protected]> > --- > include/trace/events/module.h | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/include/trace/events/module.h b/include/trace/events/module.h > index 161932737416..1228d963b6d1 100644 > --- a/include/trace/events/module.h > +++ b/include/trace/events/module.h > @@ -78,7 +78,8 @@ DECLARE_EVENT_CLASS(module_refcnt, > > TP_fast_assign( > __entry->ip = ip; > - __entry->refcnt = __this_cpu_read(mod->refptr->incs) + > __this_cpu_read(mod->refptr->decs); > + __entry->refcnt = __this_cpu_read(mod->refptr->incs) - > + __this_cpu_read(mod->refptr->decs); I know this breaks the 80 column rule, but please keep it on one line. Look at the above. The line you are removing is much easier to read than the one you replaced it with. Or if it is too big, what about: __entry->refcnt = __this_cpu_read(mod->refptr->incs) - __this_cpu_read(mod->refptr->decs); Thanks, -- Steve > __assign_str(name, mod->name); > ), > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
