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

[Mark Brown]

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.

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