linux-stable/include/linux/bsearch.h
Peter Zijlstra df65bba1dc lib/bsearch: Provide __always_inline variant
For code that needs the ultimate performance (it can inline the @cmp
function too) or simply needs to avoid calling external functions for
whatever reason, provide an __always_inline variant of bsearch().

[ tglx: Renamed to __inline_bsearch() as suggested by Andy ]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135313.624443814@linutronix.de
2020-06-11 15:14:53 +02:00

32 lines
624 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BSEARCH_H
#define _LINUX_BSEARCH_H
#include <linux/types.h>
static __always_inline
void *__inline_bsearch(const void *key, const void *base, size_t num, size_t size, cmp_func_t cmp)
{
const char *pivot;
int result;
while (num > 0) {
pivot = base + (num >> 1) * size;
result = cmp(key, pivot);
if (result == 0)
return (void *)pivot;
if (result > 0) {
base = pivot + size;
num--;
}
num >>= 1;
}
return NULL;
}
extern void *bsearch(const void *key, const void *base, size_t num, size_t size, cmp_func_t cmp);
#endif /* _LINUX_BSEARCH_H */