diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2012-10-15 17:20:54 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2012-10-15 17:20:54 +0200 |
| commit | df9b42963f2d010ae3163a894ce22cf6b27cd344 (patch) | |
| tree | f42f826d9bb975766c1a79986c39e64c9a900908 /include/linux/kernel.h | |
| parent | 33766368f6532313571534f9112b1796d6651bbe (diff) | |
| parent | c3e7724b6bc2f25e46c38dbe68f09d71fafeafb8 (diff) | |
| download | linux-df9b42963f2d010ae3163a894ce22cf6b27cd344.tar.gz linux-df9b42963f2d010ae3163a894ce22cf6b27cd344.tar.xz | |
Merge remote-tracking branch 'wireless/master' into mac80211
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 604382143bcf..2451f1f7a1d9 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -82,10 +82,18 @@ __x - (__x % (y)); \ } \ ) + +/* + * Divide positive or negative dividend by positive divisor and round + * to closest integer. Result is undefined for negative divisors. + */ #define DIV_ROUND_CLOSEST(x, divisor)( \ { \ - typeof(divisor) __divisor = divisor; \ - (((x) + ((__divisor) / 2)) / (__divisor)); \ + typeof(x) __x = x; \ + typeof(divisor) __d = divisor; \ + (((typeof(x))-1) > 0 || (__x) > 0) ? \ + (((__x) + ((__d) / 2)) / (__d)) : \ + (((__x) - ((__d) / 2)) / (__d)); \ } \ ) |