Messages in this thread | | | Date | Fri, 24 May 2019 11:26:56 -0400 | From | Steven Rostedt <> | Subject | Re: [RFC][PATCH] kernel.h: Add generic roundup_64() macro |
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On Fri, 24 May 2019 16:11:14 +0100 Roger Willcocks <roger@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/20190523133648.591f9e78@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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