Hi Jason, [auto build test ERROR on linus/master] [also build test ERROR on v4.9 next-20161215] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Jason-A-Donenfeld/siphash-add-cryptographically-secure-hashtable-function/20161215-095213 config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 6.2.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=ia64 Note: the linux-review/Jason-A-Donenfeld/siphash-add-cryptographically-secure-hashtable-function/20161215-095213 HEAD 3e343f4316f94cded0d1384cf35957fd51dbbc28 builds fine. It only hurts bisectibility. All error/warnings (new ones prefixed by >>): In file included from include/linux/linkage.h:6:0, from include/linux/kernel.h:6, from lib/siphash.c:12: >> lib/siphash.c:152:15: error: 'siphash24_unaligned' undeclared here (not in a function) EXPORT_SYMBOL(siphash24_unaligned); ^ include/linux/export.h:58:16: note: in definition of macro '___EXPORT_SYMBOL' extern typeof(sym) sym; \ ^~~ >> lib/siphash.c:152:1: note: in expansion of macro 'EXPORT_SYMBOL' EXPORT_SYMBOL(siphash24_unaligned); ^~~~~~~~~~~~~ vim +/siphash24_unaligned +152 lib/siphash.c 6 * https://131002.net/siphash/ 7 * 8 * This implementation is specifically for SipHash2-4. 9 */ 10 11 #include <linux/siphash.h> > 12 #include <linux/kernel.h> 13 #include <asm/unaligned.h> 14 15 #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 16 #include <linux/dcache.h> 17 #include <asm/word-at-a-time.h> 18 #endif 19 20 static inline u16 le16_to_cpuvp(const void *p) 21 { 22 return le16_to_cpup(p); 23 } 24 static inline u32 le32_to_cpuvp(const void *p) 25 { 26 return le32_to_cpup(p); 27 } 28 static inline u64 le64_to_cpuvp(const void *p) 29 { 30 return le64_to_cpup(p); 31 } 32 33 #define SIPROUND \ 34 do { \ 35 v0 += v1; v1 = rol64(v1, 13); v1 ^= v0; v0 = rol64(v0, 32); \ 36 v2 += v3; v3 = rol64(v3, 16); v3 ^= v2; \ 37 v0 += v3; v3 = rol64(v3, 21); v3 ^= v0; \ 38 v2 += v1; v1 = rol64(v1, 17); v1 ^= v2; v2 = rol64(v2, 32); \ 39 } while(0) 40 41 /** 42 * siphash - compute 64-bit siphash PRF value 43 * @data: buffer to hash, must be aligned to SIPHASH_ALIGNMENT 44 * @size: size of @data 45 * @key: key buffer of size SIPHASH_KEY_LEN, must be aligned to SIPHASH_ALIGNMENT 46 */ 47 u64 siphash(const u8 *data, size_t len, const u8 key[SIPHASH_KEY_LEN]) 48 { 49 u64 v0 = 0x736f6d6570736575ULL; 50 u64 v1 = 0x646f72616e646f6dULL; 51 u64 v2 = 0x6c7967656e657261ULL; 52 u64 v3 = 0x7465646279746573ULL; 53 u64 b = ((u64)len) << 56; 54 u64 k0 = le64_to_cpuvp(key); 55 u64 k1 = le64_to_cpuvp(key + sizeof(u64)); 56 u64 m; 57 const u8 *end = data + len - (len % sizeof(u64)); 58 const u8 left = len & (sizeof(u64) - 1); 59 v3 ^= k1; 60 v2 ^= k0; 61 v1 ^= k1; 62 v0 ^= k0; 63 for (; data != end; data += sizeof(u64)) { 64 m = le64_to_cpuvp(data); 65 v3 ^= m; 66 SIPROUND; 67 SIPROUND; 68 v0 ^= m; 69 } 70 #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 71 if (left) 72 b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left))); 73 #else 74 switch (left) { 75 case 7: b |= ((u64)data[6]) << 48; 76 case 6: b |= ((u64)data[5]) << 40; 77 case 5: b |= ((u64)data[4]) << 32; 78 case 4: b |= le32_to_cpuvp(data); break; 79 case 3: b |= ((u64)data[2]) << 16; 80 case 2: b |= le16_to_cpuvp(data); break; 81 case 1: b |= data[0]; 82 } 83 #endif 84 v3 ^= b; 85 SIPROUND; 86 SIPROUND; 87 v0 ^= b; 88 v2 ^= 0xff; 89 SIPROUND; 90 SIPROUND; 91 SIPROUND; 92 SIPROUND; 93 return (v0 ^ v1) ^ (v2 ^ v3); 94 } 95 EXPORT_SYMBOL(siphash); 96 97 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 98 /** 99 * siphash - compute 64-bit siphash PRF value, without alignment requirements 100 * @data: buffer to hash 101 * @size: size of @data 102 * @key: key buffer of size SIPHASH_KEY_LEN, must be aligned to SIPHASH_ALIGNMENT 103 */ 104 u64 siphash_unaligned(const u8 *data, size_t len, const u8 key[SIPHASH_KEY_LEN]) 105 { 106 u64 v0 = 0x736f6d6570736575ULL; 107 u64 v1 = 0x646f72616e646f6dULL; 108 u64 v2 = 0x6c7967656e657261ULL; 109 u64 v3 = 0x7465646279746573ULL; 110 u64 b = ((u64)len) << 56; 111 u64 k0 = le64_to_cpuvp(key); 112 u64 k1 = le64_to_cpuvp(key + sizeof(u64)); 113 u64 m; 114 const u8 *end = data + len - (len % sizeof(u64)); 115 const u8 left = len & (sizeof(u64) - 1); 116 v3 ^= k1; 117 v2 ^= k0; 118 v1 ^= k1; 119 v0 ^= k0; 120 for (; data != end; data += sizeof(u64)) { 121 m = get_unaligned_le64(data); 122 v3 ^= m; 123 SIPROUND; 124 SIPROUND; 125 v0 ^= m; 126 } 127 #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 128 if (left) 129 b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left))); 130 #else 131 switch (left) { 132 case 7: b |= ((u64)data[6]) << 48; 133 case 6: b |= ((u64)data[5]) << 40; 134 case 5: b |= ((u64)data[4]) << 32; 135 case 4: b |= get_unaligned_le32(data); break; 136 case 3: b |= ((u64)data[2]) << 16; 137 case 2: b |= get_unaligned_le16(data); break; 138 case 1: b |= data[0]; 139 } 140 #endif 141 v3 ^= b; 142 SIPROUND; 143 SIPROUND; 144 v0 ^= b; 145 v2 ^= 0xff; 146 SIPROUND; 147 SIPROUND; 148 SIPROUND; 149 SIPROUND; 150 return (v0 ^ v1) ^ (v2 ^ v3); 151 } > 152 EXPORT_SYMBOL(siphash24_unaligned); 153 #endif --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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