On Fri, 24 May 2019 16:11:14 +0100
Roger Willcocks <ro...@filmlight.ltd.uk> wrote:
> On 23/05/2019 16:27, Steven Rostedt wrote:
> >
> > I haven't yet tested this, but what about something like the following:
> >
> > ...perhaps forget about the constant check, and just force
> > the power of two check:
> >
> > \
> > if (!(__y & (__y >> 1))) { \
> > __x = round_up(x, y); \
> > } else { \
>
> You probably want
>
> if (!(__y & (__y - 1))
>
> --
Yes I do. I corrected it in my next email.
http://lkml.kernel.org/r/20190523133648.591f9...@gandalf.local.home
> #define roundup(x, y) ( \
> { \
> typeof(y) __y = y; \
> typeof(x) __x; \
> \
> if (__y & (__y - 1)) \
> __x = round_up(x, __y); \
> else \
> __x = (((x) + (__y - 1)) / __y) * __y; \
> __x; \
> })
-- Steve
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