Merge tag 'for-5.3-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux-2.6-microblaze.git] / tools / testing / radix-tree / regression4.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <linux/gfp.h>
4 #include <linux/slab.h>
5 #include <linux/radix-tree.h>
6 #include <linux/rcupdate.h>
7 #include <stdlib.h>
8 #include <pthread.h>
9 #include <stdio.h>
10 #include <assert.h>
11
12 #include "regression.h"
13
14 static pthread_barrier_t worker_barrier;
15 static int obj0, obj1;
16 static RADIX_TREE(mt_tree, GFP_KERNEL);
17
18 static void *reader_fn(void *arg)
19 {
20         int i;
21         void *entry;
22
23         rcu_register_thread();
24         pthread_barrier_wait(&worker_barrier);
25
26         for (i = 0; i < 1000000; i++) {
27                 rcu_read_lock();
28                 entry = radix_tree_lookup(&mt_tree, 0);
29                 rcu_read_unlock();
30                 if (entry != &obj0) {
31                         printf("iteration %d bad entry = %p\n", i, entry);
32                         abort();
33                 }
34         }
35
36         rcu_unregister_thread();
37
38         return NULL;
39 }
40
41 static void *writer_fn(void *arg)
42 {
43         int i;
44
45         rcu_register_thread();
46         pthread_barrier_wait(&worker_barrier);
47
48         for (i = 0; i < 1000000; i++) {
49                 radix_tree_insert(&mt_tree, 1, &obj1);
50                 radix_tree_delete(&mt_tree, 1);
51         }
52
53         rcu_unregister_thread();
54
55         return NULL;
56 }
57
58 void regression4_test(void)
59 {
60         pthread_t reader, writer;
61
62         printv(1, "regression test 4 starting\n");
63
64         radix_tree_insert(&mt_tree, 0, &obj0);
65         pthread_barrier_init(&worker_barrier, NULL, 2);
66
67         if (pthread_create(&reader, NULL, reader_fn, NULL) ||
68             pthread_create(&writer, NULL, writer_fn, NULL)) {
69                 perror("pthread_create");
70                 exit(1);
71         }
72
73         if (pthread_join(reader, NULL) || pthread_join(writer, NULL)) {
74                 perror("pthread_join");
75                 exit(1);
76         }
77
78         printv(1, "regression test 4 passed\n");
79 }