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| author |   Viresh Kumar <viresh.kumar@linaro.org> | 2021-07-01 07:32:37 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2021-07-01 07:32:37 +0530 |
| commit | c503c193db7d7ccc0c58b1ef694eaef331318149 (patch) | |
| tree | 44d3215196f385e88fa5da6affc58649c90e0ea9 /include/linux/math64.h | |
| parent | dt-bindings: cpufreq: update cpu type and clock name for MT8173 SoC (diff) | |
| parent | cpufreq: CPPC: Add support for frequency invariance (diff) | |
Merge branch 'cpufreq/cppc-fie' into cpufreq/arm/linux-next
Diffstat (limited to 'include/linux/math64.h')
| -rw-r--r-- | include/linux/math64.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/math64.h b/include/linux/math64.h index 66deb1fdc2ef..2928f03d6d46 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -3,6 +3,7 @@ #define _LINUX_MATH64_H #include <linux/types.h> +#include <linux/math.h> #include <vdso/math64.h> #include <asm/div64.h> @@ -234,6 +235,24 @@ static inline u64 mul_u64_u64_shr(u64 a, u64 b, unsigned int shift) #endif +#ifndef mul_s64_u64_shr +static inline u64 mul_s64_u64_shr(s64 a, u64 b, unsigned int shift) +{ + u64 ret; + + /* + * Extract the sign before the multiplication and put it back + * afterwards if needed. + */ + ret = mul_u64_u64_shr(abs(a), b, shift); + + if (a < 0) + ret = -((s64) ret); + + return ret; +} +#endif /* mul_s64_u64_shr */ + #ifndef mul_u64_u32_div static inline u64 mul_u64_u32_div(u64 a, u32 mul, u32 divisor) { |