Hi "Stephan, Thank you for the patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on cryptodev/master crypto/master v5.9-rc3 next-20200828] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Stephan-M-ller/dev-random-a-new-approach-with-full-SP800-90B-compliance/20200825-153914 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git d162219c655c8cf8003128a13840d6c1e183fb80 config: riscv-allmodconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/char/lrng/lrng_pool.c:18: >> drivers/char/lrng/lrng_lfsr.h:44:4: error: 'latent_entropy' attribute only applies to functions and variables 44 | atomic_t pool[LRNG_POOL_SIZE] __latent_entropy; | ^~~~~~~~ -- In file included from drivers/char/lrng/lrng_chacha20.c:17: >> drivers/char/lrng/lrng_chacha20.h:17:2: error: 'latent_entropy' attribute only applies to functions and variables 17 | } key __latent_entropy; | ^ drivers/char/lrng/lrng_chacha20.h:19:2: error: 'latent_entropy' attribute only applies to functions and variables 19 | u32 nonce[3] __latent_entropy; | ^~~ # https://github.com/0day-ci/linux/commit/b5cc1c486b8491ab0a3817a48964bfd4797484c8 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stephan-M-ller/dev-random-a-new-approach-with-full-SP800-90B-compliance/20200825-153914 git checkout b5cc1c486b8491ab0a3817a48964bfd4797484c8 vim +/latent_entropy +44 drivers/char/lrng/lrng_lfsr.h 16 17 /* 18 * This is the entropy pool used by the slow noise source. Its size should 19 * be at least as large as LRNG_DRNG_SECURITY_STRENGTH_BITS. 20 * 21 * The pool array is aligned to 8 bytes to comfort the kernel crypto API cipher 22 * implementations of the hash functions used to read the pool: for some 23 * accelerated implementations, we need an alignment to avoid a realignment 24 * which involves memcpy(). The alignment to 8 bytes should satisfy all crypto 25 * implementations. 26 * 27 * LRNG_POOL_SIZE is allowed to be changed only if the taps of the polynomial 28 * used for the LFSR are changed as well. The size must be in powers of 2 due 29 * to the mask handling in lrng_pool_lfsr_u32 which uses AND instead of modulo. 30 */ 31 struct lrng_pool { 32 union { 33 struct { 34 /* 35 * hash_df implementation: counter, requested_bits and 36 * pool form a linear buffer that is used in the 37 * hash_df function specified in SP800-90A section 38 * 10.3.1 39 */ 40 unsigned char counter; 41 __be32 requested_bits; 42 43 /* Pool */ > 44 atomic_t pool[LRNG_POOL_SIZE] __latent_entropy; 45 /* Ptr into pool for next IRQ word injection */ 46 atomic_t pool_ptr; 47 /* rotate for LFSR */ 48 atomic_t input_rotate; 49 /* All NUMA DRNGs seeded? */ 50 bool all_online_numa_node_seeded; 51 /* IRQ noise source status info */ 52 struct lrng_irq_info irq_info; 53 /* Serialize read of entropy pool */ 54 spinlock_t lock; 55 }; 56 /* 57 * Static SHA-1 implementation in lrng_cc20_hash_buffer 58 * processes data 64-byte-wise. Hence, ensure proper size 59 * of LRNG entropy pool data structure. 60 */ 61 u8 hash_input_buf[LRNG_POOL_SIZE_BYTES + 64]; 62 }; 63 }; 64 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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