Import min_not_zero() macro from Linux used by some kernel code.
Signed-off-by: Andrey Smirnov <[email protected]>
---
include/linux/kernel.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ee0b48e08..849c079d0 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -135,6 +135,16 @@ extern long long simple_strtoll(const char *,char
**,unsigned int);
_max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
(_max2 > _max3 ? _max2 : _max3); })
+/**
+ * min_not_zero - return the minimum that is _not_ zero, unless both are zero
+ * @x: value1
+ * @y: value2
+ */
+#define min_not_zero(x, y) ({ \
+ typeof(x) __x = (x); \
+ typeof(y) __y = (y); \
+ __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
+
/**
* clamp - return a value clamped to a given range with strict typechecking
* @val: current value
--
2.20.1
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