Re: [PATCH] x86/vm86/32: Remove VM86_SCREEN_BITMAP support

[Andrea Arcangeli]

On Fri, Jan 08, 2021 at 10:55:05AM -0800, Andy Lutomirski wrote:
> The implementation was rather buggy.  It unconditionally marked PTEs
> released the mmap lock before flushing the TLB, which could allow a racing
> CoW operation to falsely believe that the underlying memory was not
> writable.
> 
> I can't find any users at all of this mechanism, so just remove it.

Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>