lkml.org 
[lkml]   [2022]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: linux-next: manual merge of the rust tree with the char-misc tree
On Mon, May 16, 2022 at 10:18:45AM +0200, Miguel Ojeda wrote:
> Hi Greg,
>
> On Mon, May 16, 2022 at 9:49 AM Greg KH <greg@kroah.com> wrote:
> >
> > Odd, why does the Rust binder implementation require the IOCTL
> > definitions to be in an enum instead of a #define?
>
> It is because bindgen (the tool which generates the "raw" C bindings)
> only works with simple C `#define`s. Thus there are two options when
> one hits something like this: either copy-paste them manually into the
> Rust side (which adds maintenance), or change them into real
> objects/identifiers in the C side.
>
> There may be support in the future for expanding macros that end up in
> a numeric one: https://github.com/rust-lang/rust-bindgen/issues/753.
>
> Stephen: the resolution looks fine, thanks!
>
> > If that's required, I can take that type of change now to prevent merge
> > issues in the future.
>
> We have two so far: this one (for the RFC Android patch) and another
> small one in include/linux/spinlock.h (for the `sync` module).
>
> So far I have put those changes in their respective patches, but if
> you prefer I can send them independently too (like the prerequisite
> patches).

The binder one I can take now if you want to send that to me, as that
would make your development life easier.

thanks,

greg k-h

\
 
 \ /
  Last update: 2022-05-16 10:28    [W:0.161 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site