Hi Jarkko, I love your patch! Perhaps something to improve: [auto build test WARNING on security/next-testing] [also build test WARNING on integrity/next-integrity char-misc/char-misc-testing linus/master v5.9-rc8 next-20201002] [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/Jarkko-Sakkinen/KEYS-trusted-Fix-incorrect-handling-of-tpm_get_random/20201005-092710 base: https://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git next-testing config: x86_64-randconfig-a002-20201005 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bcd05599d0e53977a963799d6ee4f6e0bc21331b) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/ef36c0cd07555d658f81aee66abb02bdbe1c37b7 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jarkko-Sakkinen/KEYS-trusted-Fix-incorrect-handling-of-tpm_get_random/20201005-092710 git checkout ef36c0cd07555d658f81aee66abb02bdbe1c37b7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from security/keys/encrypted-keys/encrypted.c:22: In file included from include/keys/trusted-type.h:12: >> include/linux/tpm.h:423:16: warning: no previous prototype for function 'tpm_transmit_cmd' [-Wmissing-prototypes] extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf, ^ include/linux/tpm.h:423:8: note: declare 'static' if the function is not intended to be used outside of this translation unit extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf, ^ >> include/linux/tpm.h:426:1: warning: non-void function does not return a value [-Wreturn-type] } ^ 2 warnings generated. vim +/tpm_transmit_cmd +423 include/linux/tpm.h 397 398 extern int tpm_is_tpm2(struct tpm_chip *chip); 399 extern __must_check int tpm_try_get_ops(struct tpm_chip *chip); 400 extern void tpm_put_ops(struct tpm_chip *chip); 401 extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf, 402 size_t min_rsp_body_length, const char *desc); 403 extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, 404 struct tpm_digest *digest); 405 extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, 406 struct tpm_digest *digests); 407 extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen); 408 extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max); 409 extern struct tpm_chip *tpm_default_chip(void); 410 void tpm2_flush_context(struct tpm_chip *chip, u32 handle); 411 #else 412 static inline int tpm_is_tpm2(struct tpm_chip *chip) 413 { 414 return -ENODEV; 415 } 416 static inline int tpm_try_get_ops(struct tpm_chip *chip) 417 { 418 return -ENODEV; 419 } 420 static inline void tpm_put_ops(struct tpm_chip *chip) 421 { 422 } > 423 extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf, 424 size_t min_rsp_body_length, const char *desc) 425 { > 426 } 427 static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, 428 struct tpm_digest *digest) 429 { 430 return -ENODEV; 431 } 432 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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