On Tue, 03 Mar 2009 09:15:42 +0800
Li Zefan <l...@cn.fujitsu.com> wrote:
> >> +/**
> >> + * cgroup_file_mode - deduce file mode of a control file
> >> + * @cft: the control file in question
> >> + *
> >> + * returns cftype->mode if ->mode is not 0
> >> + * returns 0644 if it has both a read and a write handler
> >> + * returns 0444 if it has only a read handler
> >> + * returns 0200 if it has only a write hander
> >> + */
> >> +static int cgroup_file_mode(const struct cftype *cft)
> >> +{
> >> + int mode = 0;
> >> +
> >> + if (cft->mode)
> >> + return cft->mode;
> >> +
> >> + if (cft->read || cft->read_u64 || cft->read_s64 ||
> >> + cft->read_map || cft->read_seq_string)
> >> + mode += 0444;
> >> +
> >> + if (cft->write || cft->write_u64 || cft->write_s64 ||
> >> + cft->write_string || cft->trigger)
> >> + mode += 0200;
> >> +
> >
> > += is not |=...
> >
>
> Ah, yes, though both happen to result in 0644.
>
yes but I like |= rather than += in bit ops.
Reviewed-by; KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
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