Instead of open-coding clamp_t macro min_t and max_t the way clamp
macro does and instead of open-coding clamp_val simply use clamp_t.
Furthermore, normalise argument naming in the macros to be lo and
hi.
Signed-off-by: Michal Nazarewicz <min...@mina86.com>
---
include/linux/kernel.h | 24 +++++++-----------------
1 file changed, 7 insertions(+), 17 deletions(-)
This is an exceprt from the other bigger patch which had some
controversy I assume because of the way it reimplemented min and max.
This only contains refactoring of clamp which I believe should be
uncontroversial.
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index c39c69d..40728cf 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -731,7 +731,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode
oops_dump_mode) { }
* @lo: lowest allowable value
* @hi: highest allowable value
*
- * This macro does strict typechecking of min/max to make sure they are of the
+ * This macro does strict typechecking of lo/hi to make sure they are of the
* same type as val. See the unnecessary pointer comparisons.
*/
#define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)
@@ -756,36 +756,26 @@ static inline void ftrace_dump(enum ftrace_dump_mode
oops_dump_mode) { }
* clamp_t - return a value clamped to a given range using a given type
* @type: the type of variable to use
* @val: current value
- * @min: minimum allowable value
- * @max: maximum allowable value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
*
* This macro does no typechecking and uses temporary variables of type
* 'type' to make all the comparisons.
*/
-#define clamp_t(type, val, min, max) ({ \
- type __val = (val); \
- type __min = (min); \
- type __max = (max); \
- __val = __val < __min ? __min: __val; \
- __val > __max ? __max: __val; })
+#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)
/**
* clamp_val - return a value clamped to a given range using val's type
* @val: current value
- * @min: minimum allowable value
- * @max: maximum allowable value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
*
* This macro does no typechecking and uses temporary variables of whatever
* type the input argument 'val' is. This is useful when val is an unsigned
* type and min and max are literals that will otherwise be assigned a signed
* integer type.
*/
-#define clamp_val(val, min, max) ({ \
- typeof(val) __val = (val); \
- typeof(val) __min = (min); \
- typeof(val) __max = (max); \
- __val = __val < __min ? __min: __val; \
- __val > __max ? __max: __val; })
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
/*
--
2.1.0.rc2.206.gedb03e5
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