Man pages matching name hwlocality_linux_libnuma_bitmask in section 3:

hwlocality_linux_libnuma_bitmask.3.en	debian 10 / libhwloc-doc
hwlocality_linux_libnuma_bitmask.3.en	debian 11 / libhwloc-doc
hwlocality_linux_libnuma_bitmask.3.en	debian 12 / libhwloc-doc