mirror of https://gitee.com/openkylin/linux.git
143 lines
2.4 KiB
C
143 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#include <linux/module.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
|
|
static __init int memset16_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u16 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 2, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
for (j = 0; j < 256; j++) {
|
|
memset(p, 0xa1, 256 * 2 * sizeof(v));
|
|
memset16(p + i, 0xb1b2, j);
|
|
for (k = 0; k < 512; k++) {
|
|
v = p[k];
|
|
if (k < i) {
|
|
if (v != 0xa1a1)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k;
|
|
return 0;
|
|
}
|
|
|
|
static __init int memset32_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u32 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 4, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
for (j = 0; j < 256; j++) {
|
|
memset(p, 0xa1, 256 * 2 * sizeof(v));
|
|
memset32(p + i, 0xb1b2b3b4, j);
|
|
for (k = 0; k < 512; k++) {
|
|
v = p[k];
|
|
if (k < i) {
|
|
if (v != 0xa1a1a1a1)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2b3b4)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1a1a1)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k;
|
|
return 0;
|
|
}
|
|
|
|
static __init int memset64_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u64 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 8, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
for (j = 0; j < 256; j++) {
|
|
memset(p, 0xa1, 256 * 2 * sizeof(v));
|
|
memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j);
|
|
for (k = 0; k < 512; k++) {
|
|
v = p[k];
|
|
if (k < i) {
|
|
if (v != 0xa1a1a1a1a1a1a1a1ULL)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2b3b4b5b6b7b8ULL)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1a1a1a1a1a1a1ULL)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k;
|
|
return 0;
|
|
}
|
|
|
|
static __init int string_selftest_init(void)
|
|
{
|
|
int test, subtest;
|
|
|
|
test = 1;
|
|
subtest = memset16_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 2;
|
|
subtest = memset32_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 3;
|
|
subtest = memset64_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
pr_info("String selftests succeeded\n");
|
|
return 0;
|
|
fail:
|
|
pr_crit("String selftest failure %d.%08x\n", test, subtest);
|
|
return 0;
|
|
}
|
|
|
|
module_init(string_selftest_init);
|
|
MODULE_LICENSE("GPL v2");
|