linux-imx
Public
Source
committed d6b28e099691
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static __init int memset16_selftest(void)7
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{8
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unsigned i, j, k;9
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u16 v, *p;10
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p = kmalloc(256 * 2 * 2, GFP_KERNEL);12
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if (!p)13
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return -1;14
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for (i = 0; i < 256; i++) {16
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for (j = 0; j < 256; j++) {17
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memset(p, 0xa1, 256 * 2 * sizeof(v));18
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memset16(p + i, 0xb1b2, j);19
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for (k = 0; k < 512; k++) {20
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v = p[k];21
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if (k < i) {22
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if (v != 0xa1a1)23
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goto fail;24
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} else if (k < i + j) {25
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if (v != 0xb1b2)26
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goto fail;27
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} else {28
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if (v != 0xa1a1)29
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goto fail;30
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}31
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}32
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}33
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}34
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fail:36
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kfree(p);37
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if (i < 256)38
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return (i << 24) | (j << 16) | k;39
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return 0;40
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}41
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static __init int memset32_selftest(void)43
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{44
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unsigned i, j, k;45
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u32 v, *p;46
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p = kmalloc(256 * 2 * 4, GFP_KERNEL);48
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if (!p)49
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return -1;50
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for (i = 0; i < 256; i++) {52
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for (j = 0; j < 256; j++) {53
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memset(p, 0xa1, 256 * 2 * sizeof(v));54
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memset32(p + i, 0xb1b2b3b4, j);55
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for (k = 0; k < 512; k++) {56
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v = p[k];57
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if (k < i) {58
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if (v != 0xa1a1a1a1)59
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goto fail;60
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} else if (k < i + j) {61
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if (v != 0xb1b2b3b4)62
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goto fail;63
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} else {64
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if (v != 0xa1a1a1a1)65
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goto fail;66
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}67
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}68
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}69
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}70
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fail:72
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kfree(p);73
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if (i < 256)74
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return (i << 24) | (j << 16) | k;75
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return 0;76
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}77
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static __init int memset64_selftest(void)79
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{80
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unsigned i, j, k;81
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u64 v, *p;82
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p = kmalloc(256 * 2 * 8, GFP_KERNEL);84
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if (!p)85
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return -1;86
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for (i = 0; i < 256; i++) {88
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for (j = 0; j < 256; j++) {89
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memset(p, 0xa1, 256 * 2 * sizeof(v));90
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memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j);91
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for (k = 0; k < 512; k++) {92
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v = p[k];93
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if (k < i) {94
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if (v != 0xa1a1a1a1a1a1a1a1ULL)95
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goto fail;96
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} else if (k < i + j) {97
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if (v != 0xb1b2b3b4b5b6b7b8ULL)98
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goto fail;99
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} else {100
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if (v != 0xa1a1a1a1a1a1a1a1ULL)101
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goto fail;102
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}103
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}104
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}105
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}106
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fail:108
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kfree(p);109
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if (i < 256)110
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return (i << 24) | (j << 16) | k;111
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return 0;112
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}113
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static __init int string_selftest_init(void)115
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{116
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int test, subtest;117
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test = 1;119
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subtest = memset16_selftest();120
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if (subtest)121
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goto fail;122
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test = 2;124
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subtest = memset32_selftest();125
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if (subtest)126
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goto fail;127
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test = 3;129
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subtest = memset64_selftest();130
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if (subtest)131
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goto fail;132
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pr_info("String selftests succeeded\n");134
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return 0;135
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fail:136
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pr_crit("String selftest failure %d.%08x\n", test, subtest);137
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return 0;138
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}139
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module_init(string_selftest_init);141
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MODULE_LICENSE("GPL v2");