Re: [PATCH RFC/RFT 2/3] mm: helper `is_shadow_stack_vma` to check shadow stack vma

[Deepak Gupta]

On Fri, Oct 11, 2024 at 11:38:51AM +0100, Mark Brown wrote:
> On Thu, Oct 10, 2024 at 05:32:04PM -0700, Deepak Gupta wrote:
> > VM_SHADOW_STACK (alias to VM_HIGH_ARCH_5) is used to encode shadow stack
> > VMA on three architectures (x86 shadow stack, arm GCS and RISC-V shadow
> > stack). In case architecture doesn't implement shadow stack, it's VM_NONE
> > Introducing a helper `is_shadow_stack_vma` to determine shadow stack vma
> > or not.
> >
> > Signed-off-by: Deepak Gupta <debug@xxxxxxxxxxxx>
> > ---
> >  mm/gup.c |  2 +-
> >  mm/vma.h | 10 +++++++---
> >  2 files changed, 8 insertions(+), 4 deletions(-)
>
> As I noted in reply to the version of this patch in the RISC-V series
> there's another test for VM_SHADOW_STACK in mm/mmap.c.

Yeah will make sure to consolidate comments from both patch series in next
version. Thanks.