[RFC v4 17/17] procfs: display the protection-key number associated with a vma

[Michael Ellerman]

Ram Pai <linuxram at us.ibm.com> writes:

> Display the pkey number associated with the vma in smaps of a task.
> The key will be seen as below:
>
> VmFlags: rd wr mr mw me dw ac key=0

Why wouldn't we just emit a "ProtectionKey:" line like x86 does?

See their arch_show_smap().

You should probably also do what x86 does, which is to not display the
key on CPUs that don't support keys.

cheers