When the left shift amount is up to 31, the shifted quantity wants to be of unsigned int (or wider) type.
While there also adjust types: get doesn't alter the array and returns a boolean, while both don't really accept negative "nr". Drop a stray blank each as well. Signed-off-by: Jan Beulich <jbeul...@suse.com> --- Really I wonder why these exist at all; they're effectively test_bit() and __set_bit() in hypervisor terms, and iirc something like that exists in the tool stack as well. --- a/xen/include/xen/libelf.h +++ b/xen/include/xen/libelf.h @@ -445,13 +445,13 @@ struct elf_dom_parms { uint64_t virt_kend; }; -static inline void elf_xen_feature_set(int nr, uint32_t * addr) +static inline void elf_xen_feature_set(unsigned int nr, uint32_t *addr) { - addr[nr >> 5] |= 1 << (nr & 31); + addr[nr >> 5] |= 1U << (nr & 31); } -static inline int elf_xen_feature_get(int nr, uint32_t * addr) +static inline bool elf_xen_feature_get(unsigned int nr, const uint32_t *addr) { - return !!(addr[nr >> 5] & (1 << (nr & 31))); + return addr[nr >> 5] & (1U << (nr & 31)); } elf_errorstatus elf_xen_parse_features(const char *features,