Revision 72464382fc2d3673eb51f21a57f2c0a320c1552f authored by Christian König on 18 March 2019, 10:09:54 UTC, committed by Alex Deucher on 19 March 2019, 19:01:42 UTC
We only need to clear the bit in a 32bit integer.

This fixes a crah on ARM64 and PPC64LE caused by
"drm/amdgpu: update the vm invalidation engine layout V2"

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 parent 39bbd33
Raw File
test_sort.c
#include <linux/sort.h>
#include <linux/slab.h>
#include <linux/module.h>

/* a simple boot-time regression test */

#define TEST_LEN 1000

static int __init cmpint(const void *a, const void *b)
{
	return *(int *)a - *(int *)b;
}

static int __init test_sort_init(void)
{
	int *a, i, r = 1, err = -ENOMEM;

	a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL);
	if (!a)
		return err;

	for (i = 0; i < TEST_LEN; i++) {
		r = (r * 725861) % 6599;
		a[i] = r;
	}

	sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);

	err = -EINVAL;
	for (i = 0; i < TEST_LEN-1; i++)
		if (a[i] > a[i+1]) {
			pr_err("test has failed\n");
			goto exit;
		}
	err = 0;
	pr_info("test passed\n");
exit:
	kfree(a);
	return err;
}

static void __exit test_sort_exit(void)
{
}

module_init(test_sort_init);
module_exit(test_sort_exit);

MODULE_LICENSE("GPL");
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