diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-03-05 18:05:46 +0100 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-03-13 18:03:27 +0100 |
| commit | f792685006274a850e6cc0ea9ade275ccdfc90bc (patch) | |
| tree | 712b47504d4e62906e966abef11c2e051a028889 /include | |
| parent | 660cc00f8c6f7a2e16c25918590b470e86de19ec (diff) | |
math64: New div64_u64_rem helper
Provide an extended version of div64_u64() that
also returns the remainder of the division.
We are going to need this to refine the cputime
scaling code.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/math64.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/include/linux/math64.h b/include/linux/math64.h index b8ba85544721..931a619407bf 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -30,6 +30,15 @@ static inline s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder) } /** + * div64_u64_rem - unsigned 64bit divide with 64bit divisor + */ +static inline u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder) +{ + *remainder = dividend % divisor; + return dividend / divisor; +} + +/** * div64_u64 - unsigned 64bit divide with 64bit divisor */ static inline u64 div64_u64(u64 dividend, u64 divisor) @@ -61,8 +70,16 @@ static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) extern s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder); #endif +#ifndef div64_u64_rem +extern u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder); +#endif + #ifndef div64_u64 -extern u64 div64_u64(u64 dividend, u64 divisor); +static inline u64 div64_u64(u64 dividend, u64 divisor) +{ + u64 remainder; + return div64_u64_rem(dividend, divisor, &remainder); +} #endif #ifndef div64_s64 |