VisionFive2 Linux kernel

09c434b8a0047 (Thomas Gleixner    2019-05-19 13:08:20 +0100   1) // SPDX-License-Identifier: GPL-2.0-only
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   2) #define pr_fmt(fmt) "list_sort_test: " fmt
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   3) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   4) #include <linux/kernel.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   5) #include <linux/list_sort.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   6) #include <linux/list.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   7) #include <linux/module.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   8) #include <linux/printk.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700   9) #include <linux/slab.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  10) #include <linux/random.h>
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  11) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  12) /*
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  13)  * The pattern of set bits in the list length determines which cases
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  14)  * are hit in list_sort().
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  15)  */
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  16) #define TEST_LIST_LEN (512+128+2) /* not including head */
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  17) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  18) #define TEST_POISON1 0xDEADBEEF
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  19) #define TEST_POISON2 0xA324354C
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  20) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  21) struct debug_el {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  22) 	unsigned int poison1;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  23) 	struct list_head list;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  24) 	unsigned int poison2;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  25) 	int value;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  26) 	unsigned serial;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  27) };
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  28) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  29) /* Array, containing pointers to all elements in the test list */
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  30) static struct debug_el **elts __initdata;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  31) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  32) static int __init check(struct debug_el *ela, struct debug_el *elb)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  33) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  34) 	if (ela->serial >= TEST_LIST_LEN) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  35) 		pr_err("error: incorrect serial %d\n", ela->serial);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  36) 		return -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  37) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  38) 	if (elb->serial >= TEST_LIST_LEN) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  39) 		pr_err("error: incorrect serial %d\n", elb->serial);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  40) 		return -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  41) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  42) 	if (elts[ela->serial] != ela || elts[elb->serial] != elb) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  43) 		pr_err("error: phantom element\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  44) 		return -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  45) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  46) 	if (ela->poison1 != TEST_POISON1 || ela->poison2 != TEST_POISON2) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  47) 		pr_err("error: bad poison: %#x/%#x\n",
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  48) 			ela->poison1, ela->poison2);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  49) 		return -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  50) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  51) 	if (elb->poison1 != TEST_POISON1 || elb->poison2 != TEST_POISON2) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  52) 		pr_err("error: bad poison: %#x/%#x\n",
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  53) 			elb->poison1, elb->poison2);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  54) 		return -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  55) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  56) 	return 0;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  57) }
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  58) 
4f0f586bf0c89 (Sami Tolvanen      2021-04-08 11:28:34 -0700  59) static int __init cmp(void *priv, const struct list_head *a,
4f0f586bf0c89 (Sami Tolvanen      2021-04-08 11:28:34 -0700  60) 		      const struct list_head *b)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  61) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  62) 	struct debug_el *ela, *elb;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  63) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  64) 	ela = container_of(a, struct debug_el, list);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  65) 	elb = container_of(b, struct debug_el, list);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  66) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  67) 	check(ela, elb);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  68) 	return ela->value - elb->value;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  69) }
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  70) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  71) static int __init list_sort_test(void)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  72) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  73) 	int i, count = 1, err = -ENOMEM;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  74) 	struct debug_el *el;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  75) 	struct list_head *cur;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  76) 	LIST_HEAD(head);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  77) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  78) 	pr_debug("start testing list_sort()\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  79) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  80) 	elts = kcalloc(TEST_LIST_LEN, sizeof(*elts), GFP_KERNEL);
dc2bf000a2848 (Markus Elfring     2017-11-17 15:28:00 -0800  81) 	if (!elts)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  82) 		return err;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  83) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  84) 	for (i = 0; i < TEST_LIST_LEN; i++) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  85) 		el = kmalloc(sizeof(*el), GFP_KERNEL);
dc2bf000a2848 (Markus Elfring     2017-11-17 15:28:00 -0800  86) 		if (!el)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  87) 			goto exit;
dc2bf000a2848 (Markus Elfring     2017-11-17 15:28:00 -0800  88) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  89) 		 /* force some equivalencies */
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  90) 		el->value = prandom_u32() % (TEST_LIST_LEN / 3);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  91) 		el->serial = i;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  92) 		el->poison1 = TEST_POISON1;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  93) 		el->poison2 = TEST_POISON2;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  94) 		elts[i] = el;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  95) 		list_add_tail(&el->list, &head);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  96) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  97) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  98) 	list_sort(NULL, &head, cmp);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700  99) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 100) 	err = -EINVAL;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 101) 	for (cur = head.next; cur->next != &head; cur = cur->next) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 102) 		struct debug_el *el1;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 103) 		int cmp_result;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 104) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 105) 		if (cur->next->prev != cur) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 106) 			pr_err("error: list is corrupted\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 107) 			goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 108) 		}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 109) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 110) 		cmp_result = cmp(NULL, cur, cur->next);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 111) 		if (cmp_result > 0) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 112) 			pr_err("error: list is not sorted\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 113) 			goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 114) 		}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 115) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 116) 		el = container_of(cur, struct debug_el, list);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 117) 		el1 = container_of(cur->next, struct debug_el, list);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 118) 		if (cmp_result == 0 && el->serial >= el1->serial) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 119) 			pr_err("error: order of equivalent elements not "
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 120) 				"preserved\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 121) 			goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 122) 		}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 123) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 124) 		if (check(el, el1)) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 125) 			pr_err("error: element check failed\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 126) 			goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 127) 		}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 128) 		count++;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 129) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 130) 	if (head.prev != cur) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 131) 		pr_err("error: list is corrupted\n");
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 132) 		goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 133) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 134) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 135) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 136) 	if (count != TEST_LIST_LEN) {
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 137) 		pr_err("error: bad list length %d", count);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 138) 		goto exit;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 139) 	}
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 140) 
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 141) 	err = 0;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 142) exit:
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 143) 	for (i = 0; i < TEST_LIST_LEN; i++)
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 144) 		kfree(elts[i]);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 145) 	kfree(elts);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 146) 	return err;
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 147) }
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 148) module_init(list_sort_test);
e327fd7c86678 (Geert Uytterhoeven 2017-05-08 15:55:26 -0700 149) MODULE_LICENSE("GPL");