mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-15 00:34:10 +08:00
df65bba1dc
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
33 lines
624 B
C
33 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 */
|