Hi Alexander, First bad commit (maybe != root cause): tree: git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux topic-rpc-with-tls head: a72d5318846d67a7f3f5f2bcb4c0c09c4f8907d1 commit: a0a99a10f4f0e3e1e35e566687137669da78abcd [9991/9999] Port of Tempesta TLS handshakes to the Linux 5.10.68 config: um-allyesconfig (https://download.01.org/0day-ci/archive/20220122/202201221614.YmhmBHxe-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git/commit/?id=... git remote add cel git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux git fetch --no-tags cel topic-rpc-with-tls git checkout a0a99a10f4f0e3e1e35e566687137669da78abcd # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=um SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] arch/x86/crypto/sha1_ssse3_glue.c: In function 'register_sha1_ssse3': 105 | if (boot_cpu_has(X86_FEATURE_SSSE3)) | ^~~~~~~~~~~~ arch/x86/crypto/sha1_ssse3_glue.c: In function 'avx_usable': 154 | if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { | ^~~~~~~~~~~~~~~~~ arch/x86/crypto/sha1_ssse3_glue.c:154:25: note: each undeclared identifier is reported only once for each function it appears in 154 | if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { | ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for MFD_CORE Depends on HAS_IOMEM Selected by - MFD_HI6421_SPMI && STAGING && OF && SPMI WARNING: unmet direct dependencies detected for CRYPTO_SHA1_SSSE3 Depends on CRYPTO && X86 && 64BIT Selected by - TLS_HANDSHAKE && NET && TLS vim +/boot_cpu_has +105 arch/x86/crypto/sha1_ssse3_glue.c 66be895158886a Mathias Krause 2011-08-04 102 85c66ecd6f2144 tim 2015-09-16 103 static int register_sha1_ssse3(void) 85c66ecd6f2144 tim 2015-09-16 104 { 85c66ecd6f2144 tim 2015-09-16 @105 if (boot_cpu_has(X86_FEATURE_SSSE3)) 85c66ecd6f2144 tim 2015-09-16 106 return crypto_register_shash(&sha1_ssse3_alg); 85c66ecd6f2144 tim 2015-09-16 107 return 0; 85c66ecd6f2144 tim 2015-09-16 108 } 85c66ecd6f2144 tim 2015-09-16 109 85c66ecd6f2144 tim 2015-09-16 110 static void unregister_sha1_ssse3(void) 85c66ecd6f2144 tim 2015-09-16 111 { 85c66ecd6f2144 tim 2015-09-16 112 if (boot_cpu_has(X86_FEATURE_SSSE3)) 85c66ecd6f2144 tim 2015-09-16 113 crypto_unregister_shash(&sha1_ssse3_alg); 85c66ecd6f2144 tim 2015-09-16 114 } 85c66ecd6f2144 tim 2015-09-16 115 41419a28901083 Kees Cook 2020-01-14 116 asmlinkage void sha1_transform_avx(struct sha1_state *state, 41419a28901083 Kees Cook 2020-01-14 117 const u8 *data, int blocks); 85c66ecd6f2144 tim 2015-09-16 118 85c66ecd6f2144 tim 2015-09-16 119 static int sha1_avx_update(struct shash_desc *desc, const u8 *data, 85c66ecd6f2144 tim 2015-09-16 120 unsigned int len) 85c66ecd6f2144 tim 2015-09-16 121 { 41419a28901083 Kees Cook 2020-01-14 122 return sha1_update(desc, data, len, sha1_transform_avx); 85c66ecd6f2144 tim 2015-09-16 123 } 85c66ecd6f2144 tim 2015-09-16 124 85c66ecd6f2144 tim 2015-09-16 125 static int sha1_avx_finup(struct shash_desc *desc, const u8 *data, 85c66ecd6f2144 tim 2015-09-16 126 unsigned int len, u8 *out) 85c66ecd6f2144 tim 2015-09-16 127 { 41419a28901083 Kees Cook 2020-01-14 128 return sha1_finup(desc, data, len, out, sha1_transform_avx); 85c66ecd6f2144 tim 2015-09-16 129 } 85c66ecd6f2144 tim 2015-09-16 130 85c66ecd6f2144 tim 2015-09-16 131 static int sha1_avx_final(struct shash_desc *desc, u8 *out) 85c66ecd6f2144 tim 2015-09-16 132 { 85c66ecd6f2144 tim 2015-09-16 133 return sha1_avx_finup(desc, NULL, 0, out); 85c66ecd6f2144 tim 2015-09-16 134 } 85c66ecd6f2144 tim 2015-09-16 135 85c66ecd6f2144 tim 2015-09-16 136 static struct shash_alg sha1_avx_alg = { 85c66ecd6f2144 tim 2015-09-16 137 .digestsize = SHA1_DIGEST_SIZE, 85c66ecd6f2144 tim 2015-09-16 138 .init = sha1_base_init, 85c66ecd6f2144 tim 2015-09-16 139 .update = sha1_avx_update, 85c66ecd6f2144 tim 2015-09-16 140 .final = sha1_avx_final, 85c66ecd6f2144 tim 2015-09-16 141 .finup = sha1_avx_finup, 85c66ecd6f2144 tim 2015-09-16 142 .descsize = sizeof(struct sha1_state), 85c66ecd6f2144 tim 2015-09-16 143 .base = { 85c66ecd6f2144 tim 2015-09-16 144 .cra_name = "sha1", 85c66ecd6f2144 tim 2015-09-16 145 .cra_driver_name = "sha1-avx", 85c66ecd6f2144 tim 2015-09-16 146 .cra_priority = 160, 85c66ecd6f2144 tim 2015-09-16 147 .cra_blocksize = SHA1_BLOCK_SIZE, 85c66ecd6f2144 tim 2015-09-16 148 .cra_module = THIS_MODULE, 85c66ecd6f2144 tim 2015-09-16 149 } 85c66ecd6f2144 tim 2015-09-16 150 }; 85c66ecd6f2144 tim 2015-09-16 151 85c66ecd6f2144 tim 2015-09-16 152 static bool avx_usable(void) 66be895158886a Mathias Krause 2011-08-04 153 { d91cab78133d33 Dave Hansen 2015-09-02 @154 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { da154e82af4d0c Borislav Petkov 2016-04-04 155 if (boot_cpu_has(X86_FEATURE_AVX)) 66be895158886a Mathias Krause 2011-08-04 156 pr_info("AVX detected but unusable.\n"); 66be895158886a Mathias Krause 2011-08-04 157 return false; 66be895158886a Mathias Krause 2011-08-04 158 } 66be895158886a Mathias Krause 2011-08-04 159 66be895158886a Mathias Krause 2011-08-04 160 return true; 66be895158886a Mathias Krause 2011-08-04 161 } 6ca5afb8c26991 Mathias Krause 2014-03-24 162 :::::: The code at line 105 was first introduced by commit :::::: 85c66ecd6f2144c075044292359e179b20af1f2d crypto: x86/sha - Restructure x86 sha1 glue code to expose all the available sha1 transforms :::::: TO: tim <tim.c.chen(a)linux.intel.com&gt; :::::: CC: Herbert Xu <herbert(a)gondor.apana.org.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org