Re: [PATCH v3 0/6] Enable strict percpu address space checks

Dan Carpenter
2024-12-13T07:13:42Z

On Thu, Dec 12, 2024 at 07:35:41PM -0800, Andrew Morton wrote:
> On Sun, 8 Dec 2024 21:45:15 +0100 Uros Bizjak <ubizjak@gmail.com> wrote:
>
> > Enable strict percpu address space checks via x86 named address space
> > qualifiers. Percpu variables are declared in __seg_gs/__seg_fs named
> > AS and kept named AS qualified until they are dereferenced via percpu
> > accessor. This approach enables various compiler checks for
> > cross-namespace variable assignments.
> >
> > Please note that current version of sparse doesn't know anything about
> > __typeof_unqual__() operator. Avoid the usage of __typeof_unqual__()
> > when sparse checking is active to prevent sparse errors with unknowing
> > keyword. The proposed patch by Dan Carpenter to implement
> > __typeof_unqual__() handling in sparse is located at:
>
> google("what the hell is typeof_unequal") failed me.

I'm glad I'm not the only person who read that as "equal" instead of
"qualified".

regards,
dan carpenter