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Code Issues Releases Wiki Activity

minmax: deduplicate __unconst_integer_typeof() 

It appears that compiler_types.h already have an implementation of the
__unconst_integer_typeof() called __unqual_scalar_typeof().  Use it
instead of the copy.

Link: https://lkml.kernel.org/r/20230911154913.4176033-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Andy Shevchenko 2023-09-11 18:49:13 +03:00 committed by Andrew Morton
parent 6309727ef2
commit 5e57418a20
1 changed files with 3 additions and 23 deletions
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26
include/linux/minmax.h
View File

@ -2,6 +2,7 @@
#ifndef _LINUX_MINMAX_H
#define _LINUX_MINMAX_H
#include <linux/compiler_types.h>
#include <linux/const.h>
#include <linux/types.h>
@ -134,27 +135,6 @@
*/
#define max_t(type, x, y) __careful_cmp((type)(x), (type)(y), >)
/*
* Remove a const qualifier from integer types
* _Generic(foo, type-name: association, ..., default: association) performs a
* comparison against the foo type (not the qualified type).
* Do not use the const keyword in the type-name as it will not match the
* unqualified type of foo.
*/
#define __unconst_integer_type_cases(type) \
unsigned type: (unsigned type)0, \
signed type: (signed type)0
#define __unconst_integer_typeof(x) typeof( \
_Generic((x), \
char: (char)0, \
__unconst_integer_type_cases(char), \
__unconst_integer_type_cases(short), \
__unconst_integer_type_cases(int), \
__unconst_integer_type_cases(long), \
__unconst_integer_type_cases(long long), \
default: (x)))
/*
* Do not check the array parameter using __must_be_array().
* In the following legit use-case where the "array" passed is a simple pointer,
@ -169,13 +149,13 @@
* 'int *buff' and 'int buff[N]' types.
*
* The array can be an array of const items.
* typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
* typeof() keeps the const qualifier. Use __unqual_scalar_typeof() in order
* to discard the const qualifier for the __element variable.
*/
#define __minmax_array(op, array, len) ({ \
typeof(&(array)[0]) __array = (array); \
typeof(len) __len = (len); \
__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
__unqual_scalar_typeof(__array[0]) __element = __array[--__len];\
while (__len--) \
__element = op(__element, __array[__len]); \
__element; })