Re: [PATCH 02/23] x86, kaiser: do not set _PAGE_USER for init_mm page tables

[Dave Hansen]

On 11/01/2017 02:28 PM, Thomas Gleixner wrote:
> On Wed, 1 Nov 2017, Andy Lutomirski wrote:
>> The vsyscall page is _PAGE_USER and lives in init_mm via the fixmap.
> 
> Groan, forgot about that abomination, but still there is no point in having
> it marked PAGE_USER in the init_mm at all, kaiser or not.

So shouldn't this patch effectively make the vsyscall page unusable?
Any idea why that didn't show up in any of the x86 selftests?