Man pages matching name gfs_acl_from_xattr_value in section 3:

gfs_acl_from_xattr_value.3.en	debian 10 / libgfarm-dev
gfs_acl_from_xattr_value.3.en	debian 11 / libgfarm-dev
gfs_acl_from_xattr_value.3.en	debian 12 / libgfarm-dev