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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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f3def8270c
Deduplicate the same functionality implemented in several places by moving the cmp_int() helper macro into linux/sort.h. The macro performs a three-way comparison of the arguments mostly useful in different sorting strategies and algorithms. Link: https://lkml.kernel.org/r/20250427201451.900730-1-pchelkin@ispras.ru Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> Suggested-by: Darrick J. Wong <djwong@kernel.org> Acked-by: Kent Overstreet <kent.overstreet@linux.dev> Acked-by: Coly Li <colyli@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Carlos Maiolino <cem@kernel.org> Cc: Christian Brauner <brauner@kernel.org> Cc: Coly Li <colyli@kernel.org> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
38 lines
993 B
C
38 lines
993 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_SORT_H
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#define _LINUX_SORT_H
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#include <linux/types.h>
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/**
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* cmp_int - perform a three-way comparison of the arguments
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* @l: the left argument
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* @r: the right argument
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*
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* Return: 1 if the left argument is greater than the right one; 0 if the
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* arguments are equal; -1 if the left argument is less than the right one.
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*/
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#define cmp_int(l, r) (((l) > (r)) - ((l) < (r)))
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void sort_r(void *base, size_t num, size_t size,
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cmp_r_func_t cmp_func,
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swap_r_func_t swap_func,
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const void *priv);
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void sort(void *base, size_t num, size_t size,
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cmp_func_t cmp_func,
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swap_func_t swap_func);
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/* Versions that periodically call cond_resched(): */
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void sort_r_nonatomic(void *base, size_t num, size_t size,
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cmp_r_func_t cmp_func,
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swap_r_func_t swap_func,
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const void *priv);
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void sort_nonatomic(void *base, size_t num, size_t size,
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cmp_func_t cmp_func,
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swap_func_t swap_func);
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#endif
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