tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: a53913bacac4876eee9ce118b3101dff842318ef commit: fe08767e3a083e73a72f08432bc6fbd864fa7179 [2229/2229] drivers/crypto/ccp: concurrent psp access support between user and kernel space config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250515/202505150643.AFNuSCPC-lkp@i...) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) rustc: rustc 1.73.0 (cc66ad468 2023-10-03) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250515/202505150643.AFNuSCPC-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505150643.AFNuSCPC-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/crypto/ccp/hygon/psp-dev.c:25:10: warning: no previous prototype for function 'atomic64_exchange' [-Wmissing-prototypes] 25 | uint64_t atomic64_exchange(uint64_t *dst, uint64_t val) | ^ drivers/crypto/ccp/hygon/psp-dev.c:25:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 25 | uint64_t atomic64_exchange(uint64_t *dst, uint64_t val) | ^ | static drivers/crypto/ccp/hygon/psp-dev.c:30:5: warning: no previous prototype for function 'psp_mutex_init' [-Wmissing-prototypes] 30 | int psp_mutex_init(struct psp_mutex *mutex) | ^ drivers/crypto/ccp/hygon/psp-dev.c:30:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 30 | int psp_mutex_init(struct psp_mutex *mutex) | ^ | static drivers/crypto/ccp/hygon/psp-dev.c:38:5: warning: no previous prototype for function 'psp_mutex_trylock' [-Wmissing-prototypes] 38 | int psp_mutex_trylock(struct psp_mutex *mutex) | ^ drivers/crypto/ccp/hygon/psp-dev.c:38:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 38 | int psp_mutex_trylock(struct psp_mutex *mutex) | ^ | static 3 warnings generated.

vim +/atomic64_exchange +25 drivers/crypto/ccp/hygon/psp-dev.c 24

25 uint64_t atomic64_exchange(uint64_t *dst, uint64_t val) 26 { 27 return xchg(dst, val); 28 } 29 30 int psp_mutex_init(struct psp_mutex *mutex) 31 { 32 if (!mutex) 33 return -1; 34 mutex->locked = 0; 35 return 0; 36 } 37

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