Re: [RFC 2/4] x86/thread_info: kill TIF_ADDR32 in favour of ADDR_LIMIT_32BIT

From: Andy Lutomirski
Date: Fri Dec 30 2016 - 20:39:01 EST

On Fri, Dec 30, 2016 at 7:56 AM, Dmitry Safonov <dsafonov@xxxxxxxxxxxxx> wrote:
> This thread flag is completely x86-specific, consolidate it with
> ADDR_LIMIT_32BIT personality which is defined but not used on x86.
> It will free one of thread flags and consolidate personality with
> other arches.
> After this commit ADDR_LIMIT_32BIT is set by the kernel automatically
> in COMPAT_SET_PERSONALITY() for 32-bit ELF files and for 32-bit a.out.
> It's cleared in SET_PERSONALITY() for 64-bit ELFs.

I'm okay with this as a plain cleanup, but I'm not convinced that this
is really the right long-term solution. See next email.