Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
#include <perf/threadmap.h>
#include <stdlib.h>
#include <linux/refcount.h>
#include <internal/threadmap.h>
#include <string.h>
#include <asm/bug.h>
#include <stdio.h>
 
static void perf_thread_map__reset(struct perf_thread_map *map, int start, int nr)
{
<------>size_t size = (nr - start) * sizeof(map->map[0]);
 
<------>memset(&map->map[start], 0, size);
<------>map->err_thread = -1;
}
 
struct perf_thread_map *perf_thread_map__realloc(struct perf_thread_map *map, int nr)
{
<------>size_t size = sizeof(*map) + sizeof(map->map[0]) * nr;
<------>int start = map ? map->nr : 0;
 
<------>map = realloc(map, size);
<------>/*
<------> * We only realloc to add more items, let's reset new items.
<------> */
<------>if (map)
<------><------>perf_thread_map__reset(map, start, nr);
 
<------>return map;
}
 
#define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr)
 
void perf_thread_map__set_pid(struct perf_thread_map *map, int thread, pid_t pid)
{
<------>map->map[thread].pid = pid;
}
 
char *perf_thread_map__comm(struct perf_thread_map *map, int thread)
{
<------>return map->map[thread].comm;
}
 
struct perf_thread_map *perf_thread_map__new_dummy(void)
{
<------>struct perf_thread_map *threads = thread_map__alloc(1);
 
<------>if (threads != NULL) {
<------><------>perf_thread_map__set_pid(threads, 0, -1);
<------><------>threads->nr = 1;
<------><------>refcount_set(&threads->refcnt, 1);
<------>}
<------>return threads;
}
 
static void perf_thread_map__delete(struct perf_thread_map *threads)
{
<------>if (threads) {
<------><------>int i;
 
<------><------>WARN_ONCE(refcount_read(&threads->refcnt) != 0,
<------><------><------>  "thread map refcnt unbalanced\n");
<------><------>for (i = 0; i < threads->nr; i++)
<------><------><------>free(perf_thread_map__comm(threads, i));
<------><------>free(threads);
<------>}
}
 
struct perf_thread_map *perf_thread_map__get(struct perf_thread_map *map)
{
<------>if (map)
<------><------>refcount_inc(&map->refcnt);
<------>return map;
}
 
void perf_thread_map__put(struct perf_thread_map *map)
{
<------>if (map && refcount_dec_and_test(&map->refcnt))
<------><------>perf_thread_map__delete(map);
}
 
int perf_thread_map__nr(struct perf_thread_map *threads)
{
<------>return threads ? threads->nr : 1;
}
 
pid_t perf_thread_map__pid(struct perf_thread_map *map, int thread)
{
<------>return map->map[thread].pid;
}