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author | Jonathan Corbet <corbet@lwn.net> | 2008-07-14 15:29:34 -0600 |
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committer | Jonathan Corbet <corbet@lwn.net> | 2008-07-14 15:29:34 -0600 |
commit | 2fceef397f9880b212a74c418290ce69e7ac00eb (patch) | |
tree | d9cc09ab992825ef7fede4a688103503e3caf655 /include/linux/math64.h | |
parent | feae1ef116ed381625d3731c5ae4f4ebcb3fa302 (diff) | |
parent | bce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff) |
Merge commit 'v2.6.26' into bkl-removal
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 c1a5f81501f..c87f1528703 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 */ |