Merge branches 'clk-renesas', 'clk-qcom', 'clk-mtk', 'clk-milbeaut' and 'clk-imx...

[sfrench/cifs-2.6.git] / include / linux / math64.h

diff --git a/include/linux/math64.h b/include/linux/math64.h
index bb2c84afb80c6c2246d233f7acab29c33bdb372e..65bef21cdddbd7584a01b7435327cdb994009b36 100644 (file)
--- a/include/linux/math64.h
+++ b/include/linux/math64.h
@@ -284,4 +284,17 @@ static inline u64 mul_u64_u32_div(u64 a, u32 mul, u32 divisor)
 #define DIV64_U64_ROUND_UP(ll, d)      \
        ({ u64 _tmp = (d); div64_u64((ll) + _tmp - 1, _tmp); })
 
+/**
+ * DIV64_U64_ROUND_CLOSEST - unsigned 64bit divide with 64bit divisor rounded to nearest integer
+ * @dividend: unsigned 64bit dividend
+ * @divisor: unsigned 64bit divisor
+ *
+ * Divide unsigned 64bit dividend by unsigned 64bit divisor
+ * and round to closest integer.
+ *
+ * Return: dividend / divisor rounded to nearest integer
+ */
+#define DIV64_U64_ROUND_CLOSEST(dividend, divisor)     \
+       ({ u64 _tmp = (divisor); div64_u64((dividend) + _tmp / 2, _tmp); })
+
 #endif /* _LINUX_MATH64_H */