diff options
| -rw-r--r-- | lib/test_hash.c | 66 |
1 files changed, 54 insertions, 12 deletions
diff --git a/lib/test_hash.c b/lib/test_hash.c index 2b4fe4976cc4..032849a48da7 100644 --- a/lib/test_hash.c +++ b/lib/test_hash.c @@ -158,11 +158,39 @@ test_int_hash(unsigned long long h64, u32 hash_or[2][33]) #define SIZE 256 /* Run time is cubic in SIZE */ -static int __init -test_hash_init(void) +static int __init test_string_or(void) { char buf[SIZE+1]; - u32 string_or = 0, hash_or[2][33] = { { 0, } }; + u32 string_or = 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++) { + u32 h0 = full_name_hash(buf+i, buf+i, j-i); + + string_or |= h0; + } /* 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; + } + + return 0; +} + +static int __init test_hash_or(void) +{ + char buf[SIZE+1]; + u32 hash_or[2][33] = { { 0, } }; unsigned tests = 0; unsigned long long h64 = 0; int i, j; @@ -192,7 +220,6 @@ test_hash_init(void) return -EINVAL; } - string_or |= h0; h64 = h64 << 32 | h0; /* For use with hash_64 */ if (!test_int_hash(h64, hash_or)) return -EINVAL; @@ -200,12 +227,6 @@ test_hash_init(void) } /* 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); @@ -237,6 +258,13 @@ test_hash_init(void) } } + pr_notice("%u tests passed.", tests); + + return 0; +} + +static void __init notice_skipped_tests(void) +{ /* Issue notices about skipped tests. */ #ifdef HAVE_ARCH__HASH_32 #if HAVE_ARCH__HASH_32 != 1 @@ -252,10 +280,24 @@ test_hash_init(void) #else pr_info("hash_64() has no arch implementation to test."); #endif +} - pr_notice("%u tests passed.", tests); +static int __init +test_hash_init(void) +{ + int ret; - return 0; + ret = test_string_or(); + if (ret < 0) + return ret; + + ret = test_hash_or(); + if (ret < 0) + return ret; + + notice_skipped_tests(); + + return ret; } static void __exit test_hash_exit(void) |