Re: [PATCH v12 07/11] mm: Add address parameter to arch_validate_prot()

[Andrew Morton]

On Wed, 21 Feb 2018 10:15:49 -0700 Khalid Aziz <khalid.aziz@xxxxxxxxxx> wrote:

> A protection flag may not be valid across entire address space and
> hence arch_validate_prot() might need the address a protection bit is
> being set on to ensure it is a valid protection flag. For example, sparc
> processors support memory corruption detection (as part of ADI feature)
> flag on memory addresses mapped on to physical RAM but not on PFN mapped
> pages or addresses mapped on to devices. This patch adds address to the
> parameters being passed to arch_validate_prot() so protection bits can
> be validated in the relevant context.
> 
> Signed-off-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
> Cc: Khalid Aziz <khalid@xxxxxxxxxxxxxx>
> Reviewed-by: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>

Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>