On Tue, Jun 4, 2019 at 8:24 PM Joe Perches <joe@xxxxxxxxxxx> wrote: > > On Tue, 2019-06-04 at 20:13 +0900, Masahiro Yamada wrote: > > On the other hand, uapi headers are written in more strict C, where > > the C++ comment style is forbidden. > > Is this a real problem for any toolchain? I was waiting for this comment! Which standard should UAPI headers follow? Is it defined somewhere? If there is no rule, is it up to subsystem maintainers? We have a certain of unknowledge in user-space, I do not know it it is a real problem. Actually, this patch is related to this thread: https://lkml.org/lkml/2019/5/22/1441 Thomas and you agreed // should be avoided for SPDX tags in UAPI headers. So, I just thought C99 was forbidden for user-space. If C89/C90 is already fantasy, let's clearly say "Kernel requires C99 for user-space", and use // everywhere for SPDX tags? -- Best Regards Masahiro Yamada
