Re: [PATCH v3 2/6] xen/riscv: introduce asm/types.h header file

[Xenia Ragiadakou <burzalodowa@xxxxxxxxx>]

On 1/11/23 15:17, Jan Beulich wrote:
> On 11.01.2023 13:30, Xenia Ragiadakou wrote:
> > Could you please help me understand also
> > why __signed__ keyword is required when declaring __{u,s}<N>?
> > I mean why __{u,s}<N> cannot be declared using the signed type
> > specifier, just like {u,s}<N>?
> I'm afraid I can't, as this looks to have been (blindly?) imported
> from Linux very, very long ago. Having put time in going through
> our own history, I'm afraid I don't want to go further and see
> whether I could spot the reason for you by going through Linux'es.
Sorry, I was not aiming to drag you (or anyone) into spotting why Linux 
uses __signed__ when declaring __s<N>. AfAIU these types are exported 
and used in userspace and maybe the reason is to support building with 
pre-standard C compilers.
I am just wondering why Xen, that is compiled with std=c99, uses 
__signed__. If there is no reason, I think this difference between the 
declarations of __{u,s}<N> and {u,s}<N> is misleading and confusing (to 
me at least).
--
Xenia