Re: [PATCH v4 11/11] perf auxtrace: Add compat_auxtrace_mmap__{read_head|write_tail}

[Leo Yan]

On Wed, Jul 14, 2021 at 09:40:15AM +0100, Russell King (Oracle) wrote:
> On Tue, Jul 13, 2021 at 07:13:02PM +0100, Catalin Marinas wrote:
> > We could try to clarify E2.2.1 to simply state that naturally aligned
> > LDRD/STRD are single-copy atomic without any subsequent statement on the
> > translation table.
> 
> I think that clarification would be most helpful. Thanks.

Thanks for the suggestion and confirmation, Russell & Catalin.

If so, I will implement the weak functions for
compat_auxtrace_mmap__{read_head|write_tail}; and write the arm/arm64
specific functions with using LDRD/STRD instructions.

For better patches organization, I will use a separate patch set for
enabling the compat functions (in particular patches 10, 11/11) in
the next spin.

Thanks,
Leo