diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-12-19 20:03:16 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-12-29 11:38:36 +0900 |
| commit | b32aa9ebc57b8db5052e3b97dc5a3349cd91636b (patch) | |
| tree | 45bfd562e35e026d3485c9ff87fdea5c2b757359 /include/linux | |
| parent | ce480791f74859b6bac9327ee8083cb3c698d0e9 (diff) | |
linux/kernel.h: import DIV_ROUND_CLOSEST_ULL from Linux
Copied from Linux v4.20-rc7.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kernel.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index bd88483b9f6..a85c15d8dc2 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -102,6 +102,18 @@ (((__x) - ((__d) / 2)) / (__d)); \ } \ ) +/* + * Same as above but for u64 dividends. divisor must be a 32-bit + * number. + */ +#define DIV_ROUND_CLOSEST_ULL(x, divisor)( \ +{ \ + typeof(divisor) __d = divisor; \ + unsigned long long _tmp = (x) + (__d) / 2; \ + do_div(_tmp, __d); \ + _tmp; \ +} \ +) /* * Multiplies an integer by a fraction, while avoiding unnecessary |