1 files changed, 0 insertions, 256 deletions
diff --git a/lib/test_hash.c b/lib/test_hash.c
deleted file mode 100644
index cac20c5fb304..000000000000
--- a/lib/test_hash.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * Test cases for <linux/hash.h> and <linux/stringhash.h>
- * This just verifies that various ways of computing a hash
- * produce the same thing and, for cases where a k-bit hash
- * value is requested, is of the requested size.
- *
- * We fill a buffer with a 255-byte null-terminated string,
- * and use both full_name_hash() and hashlen_string() to hash the
- * substrings from i to j, where 0 <= i < j < 256.
- *
- * The returned values are used to check that __hash_32() and
- * __hash_32_generic() compute the same thing.  Likewise hash_32()
- * and hash_64().
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt "\n"
-
-#include <linux/compiler.h>
-#include <linux/types.h>
-#include <linux/module.h>
-#include <linux/hash.h>
-#include <linux/stringhash.h>
-#include <linux/printk.h>
-
-/* 32-bit XORSHIFT generator.  Seed must not be zero. */
-static u32 __init __attribute_const__
-xorshift(u32 seed)
-{
-	seed ^= seed << 13;
-	seed ^= seed >> 17;
-	seed ^= seed << 5;
-	return seed;
-}
-
-/* Given a non-zero x, returns a non-zero byte. */
-static u8 __init __attribute_const__
-mod255(u32 x)
-{
-	x = (x & 0xffff) + (x >> 16);	/* 1 <= x <= 0x1fffe */
-	x = (x & 0xff) + (x >> 8);	/* 1 <= x <= 0x2fd */
-	x = (x & 0xff) + (x >> 8);	/* 1 <= x <= 0x100 */
-	x = (x & 0xff) + (x >> 8);	/* 1 <= x <= 0xff */
-	return x;
-}
-
-/* Fill the buffer with non-zero bytes. */
-static void __init
-fill_buf(char *buf, size_t len, u32 seed)
-{
-	size_t i;
-
-	for (i = 0; i < len; i++) {
-		seed = xorshift(seed);
-		buf[i] = mod255(seed);
-	}
-}
-
-/*
- * Test the various integer hash functions.  h64 (or its low-order bits)
- * is the integer to hash.  hash_or accumulates the OR of the hash values,
- * which are later checked to see that they cover all the requested bits.
- *
- * Because these functions (as opposed to the string hashes) are all
- * inline, the code being tested is actually in the module, and you can
- * recompile and re-test the module without rebooting.
- */
-static bool __init
-test_int_hash(unsigned long long h64, u32 hash_or[2][33])
-{
-	int k;
-	u32 h0 = (u32)h64, h1, h2;
-
-	/* Test __hash32 */
-	hash_or[0][0] |= h1 = __hash_32(h0);
-#ifdef HAVE_ARCH__HASH_32
-	hash_or[1][0] |= h2 = __hash_32_generic(h0);
-#if HAVE_ARCH__HASH_32 == 1
-	if (h1 != h2) {
-		pr_err("__hash_32(%#x) = %#x != __hash_32_generic() = %#x",
-			h0, h1, h2);
-		return false;
-	}
-#endif
-#endif
-
-	/* Test k = 1..32 bits */
-	for (k = 1; k <= 32; k++) {
-		u32 const m = ((u32)2 << (k-1)) - 1;	/* Low k bits set */
-
-		/* Test hash_32 */
-		hash_or[0][k] |= h1 = hash_32(h0, k);
-		if (h1 > m) {
-			pr_err("hash_32(%#x, %d) = %#x > %#x", h0, k, h1, m);
-			return false;
-		}
-#ifdef HAVE_ARCH_HASH_32
-		h2 = hash_32_generic(h0, k);
-#if HAVE_ARCH_HASH_32 == 1
-		if (h1 != h2) {
-			pr_err("hash_32(%#x, %d) = %#x != hash_32_generic() "
-				" = %#x", h0, k, h1, h2);
-			return false;
-		}
-#else
-		if (h2 > m) {
-			pr_err("hash_32_generic(%#x, %d) = %#x > %#x",
-				h0, k, h1, m);
-			return false;
-		}
-#endif
-#endif
-		/* Test hash_64 */
-		hash_or[1][k] |= h1 = hash_64(h64, k);
-		if (h1 > m) {
-			pr_err("hash_64(%#llx, %d) = %#x > %#x", h64, k, h1, m);
-			return false;
-		}
-#ifdef HAVE_ARCH_HASH_64
-		h2 = hash_64_generic(h64, k);
-#if HAVE_ARCH_HASH_64 == 1
-		if (h1 != h2) {
-			pr_err("hash_64(%#llx, %d) = %#x != hash_64_generic() "
-				"= %#x", h64, k, h1, h2);
-			return false;
-		}
-#else
-		if (h2 > m) {
-			pr_err("hash_64_generic(%#llx, %d) = %#x > %#x",
-				h64, k, h1, m);
-			return false;
-		}
-#endif
-#endif
-	}
-
-	(void)h2;	/* Suppress unused variable warning */
-	return true;
-}
-
-#define SIZE 256	/* Run time is cubic in SIZE */
-
-static int __init
-test_hash_init(void)
-{
-	char buf[SIZE+1];
-	u32 string_or = 0, hash_or[2][33] = { { 0, } };
-	unsigned tests = 0;
-	unsigned long long h64 = 0;
-	int i, j;
-
-	fill_buf(buf, SIZE, 1);
-
-	/* Test every possible non-empty substring in the buffer. */
-	for (j = SIZE; j > 0; --j) {
-		buf[j] = '\0';
-
-		for (i = 0; i <= j; i++) {
-			u64 hashlen = hashlen_string(buf+i, buf+i);
-			u32 h0 = full_name_hash(buf+i, buf+i, j-i);
-
-			/* Check that hashlen_string gets the length right */
-			if (hashlen_len(hashlen) != j-i) {
-				pr_err("hashlen_string(%d..%d) returned length"
-					" %u, expected %d",
-					i, j, hashlen_len(hashlen), j-i);
-				return -EINVAL;
-			}
-			/* Check that the hashes match */
-			if (hashlen_hash(hashlen) != h0) {
-				pr_err("hashlen_string(%d..%d) = %08x != "
-					"full_name_hash() = %08x",
-					i, j, hashlen_hash(hashlen), h0);
-				return -EINVAL;
-			}
-
-			string_or |= h0;
-			h64 = h64 << 32 | h0;	/* For use with hash_64 */
-			if (!test_int_hash(h64, hash_or))
-				return -EINVAL;
-			tests++;
-		} /* i */
-	} /* j */
-
-	/* The OR of all the hash values should cover all the bits */
-	if (~string_or) {
-		pr_err("OR of all string hash results = %#x != %#x",
-			string_or, -1u);
-		return -EINVAL;
-	}
-	if (~hash_or[0][0]) {
-		pr_err("OR of all __hash_32 results = %#x != %#x",
-			hash_or[0][0], -1u);
-		return -EINVAL;
-	}
-#ifdef HAVE_ARCH__HASH_32
-#if HAVE_ARCH__HASH_32 != 1	/* Test is pointless if results match */
-	if (~hash_or[1][0]) {
-		pr_err("OR of all __hash_32_generic results = %#x != %#x",
-			hash_or[1][0], -1u);
-		return -EINVAL;
-	}
-#endif
-#endif
-
-	/* Likewise for all the i-bit hash values */
-	for (i = 1; i <= 32; i++) {
-		u32 const m = ((u32)2 << (i-1)) - 1;	/* Low i bits set */
-
-		if (hash_or[0][i] != m) {
-			pr_err("OR of all hash_32(%d) results = %#x "
-				"(%#x expected)", i, hash_or[0][i], m);
-			return -EINVAL;
-		}
-		if (hash_or[1][i] != m) {
-			pr_err("OR of all hash_64(%d) results = %#x "
-				"(%#x expected)", i, hash_or[1][i], m);
-			return -EINVAL;
-		}
-	}
-
-	/* Issue notices about skipped tests. */
-#ifdef HAVE_ARCH__HASH_32
-#if HAVE_ARCH__HASH_32 != 1
-	pr_info("__hash_32() is arch-specific; not compared to generic.");
-#endif
-#else
-	pr_info("__hash_32() has no arch implementation to test.");
-#endif
-#ifdef HAVE_ARCH_HASH_32
-#if HAVE_ARCH_HASH_32 != 1
-	pr_info("hash_32() is arch-specific; not compared to generic.");
-#endif
-#else
-	pr_info("hash_32() has no arch implementation to test.");
-#endif
-#ifdef HAVE_ARCH_HASH_64
-#if HAVE_ARCH_HASH_64 != 1
-	pr_info("hash_64() is arch-specific; not compared to generic.");
-#endif
-#else
-	pr_info("hash_64() has no arch implementation to test.");
-#endif
-
-	pr_notice("%u tests passed.", tests);
-
-	return 0;
-}
-
-static void __exit test_hash_exit(void)
-{
-}
-
-module_init(test_hash_init);	/* Does everything */
-module_exit(test_hash_exit);	/* Does nothing */
-
-MODULE_LICENSE("GPL");