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author | Ingo Molnar <mingo@elte.hu> | 2008-06-16 11:23:36 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-06-16 11:23:36 +0200 |
commit | 766d02786ecd22932beeb9ca8bad6d8c5a552ef9 (patch) | |
tree | f6f2df0e35bbea914d1f4d12be6d02f128c73575 /include/linux/math64.h | |
parent | 906d882cacecd37ad2fdd03ed2a9b232bcb9507e (diff) | |
parent | 066519068ad2fbe98c7f45552b1f592903a9c8c8 (diff) |
Merge branch 'linus' into core/rcutip-core-rcu-2008-06-16_09.23_Mon
Diffstat (limited to 'include/linux/math64.h')
-rw-r--r-- | include/linux/math64.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/math64.h b/include/linux/math64.h index c1a5f81501ff..c87f1528703a 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -81,4 +81,25 @@ static inline s64 div_s64(s64 dividend, s32 divisor) } #endif +u32 iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder); + +static __always_inline u32 +__iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder) +{ + u32 ret = 0; + + while (dividend >= divisor) { + /* The following asm() prevents the compiler from + optimising this loop into a modulo operation. */ + asm("" : "+rm"(dividend)); + + dividend -= divisor; + ret++; + } + + *remainder = dividend; + + return ret; +} + #endif /* _LINUX_MATH64_H */ |