Re: [PATCH v2 09/18] x86/asm: Move SYSENTER_stack to the beginning of struct tss_struct

[Thomas Gleixner]

On Tue, 21 Nov 2017, Andy Lutomirski wrote:

> I want SYSENTER_stack to have reliable overflow detection, which
> means that it needs to be at the bottom of a page, not the top.
> Move it to the beginning of struct tss_struct and page-align it.
> 
> Also add an assertion to make sure that the fixed hardware TSS
> doesn't cross a page boundary.
> 
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>

Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>