From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/include/linux/math64.h | 42 ++++++++++++++++++++++++++++++++++++++----
1 files changed, 38 insertions(+), 4 deletions(-)
diff --git a/kernel/include/linux/math64.h b/kernel/include/linux/math64.h
index 38e4db5..66deb1f 100644
--- a/kernel/include/linux/math64.h
+++ b/kernel/include/linux/math64.h
@@ -28,7 +28,7 @@
return dividend / divisor;
}
-/**
+/*
* div_s64_rem - signed 64bit divide with 32bit divisor with remainder
* @dividend: signed 64bit dividend
* @divisor: signed 32bit divisor
@@ -42,7 +42,7 @@
return dividend / divisor;
}
-/**
+/*
* div64_u64_rem - unsigned 64bit divide with 64bit divisor and remainder
* @dividend: unsigned 64bit dividend
* @divisor: unsigned 64bit divisor
@@ -56,7 +56,7 @@
return dividend / divisor;
}
-/**
+/*
* div64_u64 - unsigned 64bit divide with 64bit divisor
* @dividend: unsigned 64bit dividend
* @divisor: unsigned 64bit divisor
@@ -68,7 +68,7 @@
return dividend / divisor;
}
-/**
+/*
* div64_s64 - signed 64bit divide with 64bit divisor
* @dividend: signed 64bit dividend
* @divisor: signed 64bit divisor
@@ -263,7 +263,41 @@
}
#endif /* mul_u64_u32_div */
+u64 mul_u64_u64_div_u64(u64 a, u64 mul, u64 div);
+
#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); })
+
+/*
+ * DIV_S64_ROUND_CLOSEST - signed 64bit divide with 32bit divisor rounded to nearest integer
+ * @dividend: signed 64bit dividend
+ * @divisor: signed 32bit divisor
+ *
+ * Divide signed 64bit dividend by signed 32bit divisor
+ * and round to closest integer.
+ *
+ * Return: dividend / divisor rounded to nearest integer
+ */
+#define DIV_S64_ROUND_CLOSEST(dividend, divisor)( \
+{ \
+ s64 __x = (dividend); \
+ s32 __d = (divisor); \
+ ((__x > 0) == (__d > 0)) ? \
+ div_s64((__x + (__d / 2)), __d) : \
+ div_s64((__x - (__d / 2)), __d); \
+} \
+)
#endif /* _LINUX_MATH64_H */
--
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