It is in lib/util.h:
lib/util.h:#define DIV_ROUND_UP(X, Y) (((X) + ((Y) - 1)) / (Y))
lib/util.h:#define ROUND_UP(X, Y) (DIV_ROUND_UP(X, Y) * (Y))
Jarno
On Jun 7, 2013, at 17:39 , ext Andy Zhou wrote:
Thanks for the suggestion.
The kernel source I am looking at: 3.9.0-rc8, does not a accessible definition
of ROUND_UP, but roundup(x,y) is, and fits the bill. I am thinking of using
it instead, unless it breaks on some older kernel version that we care about.
>From kernel.h:
/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
#define roundup(x, y) ( \
{ \
const typeof(y) __y = y; \
(((x) + (__y - 1)) / __y) * __y; \
}
On Fri, Jun 7, 2013 at 7:19 AM, Rajahalme, Jarno (NSN - FI/Espoo)
<[email protected]<mailto:[email protected]>> wrote:
On Jun 7, 2013, at 13:35 , ext Andy Zhou wrote:
Is this the same as DIV_ROUND_UP?
I did not use it because DIV_ROUND_UP gives the roundup of u32, I needed the
roundup in bytes. However, I could rewrite this function using DIV_ROUND_UP.
There is ROUND_UP doing that already.
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