Re: [PATCH] UserfaultFD: Rename uffd_api.bits into .features

[Andrea Arcangeli <aarcange@redhat.com>]

Hi Pavel,

On Thu, Apr 30, 2015 at 07:38:12PM +0300, Pavel Emelyanov wrote:
> Hi,
> 
> This is (seem to be) the minimal thing that is required to unblock
> standard uffd usage from the non-cooperative one. Now more bits can
> be added to the features field indicating e.g. UFFD_FEATURE_FORK and
> others needed for the latter use-case.
> 
> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Applied.

http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?h=userfault&id=c2dee3384770a953cbad27b46854aa6fd13656c6
http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?h=userfault&id=d0df59f21f2cde4c49879c00586ce3cb1e3860fe

I was also asked if we could return the full address of the fault
including the page offset. In the end I also implemented this
incremental to your change:

http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?h=userfault&id=c308fc81b0a9c53c11b33331ad00d8e5b9763e60

Let me know if you're ok with it. The commit header explains more why
I think the bits below PAGE_SHIFT of the fault address aren't
interesting but why I did this change anyway.

After reviewing this last change I think it's time to make a proper
submit and it's polished enough for merging in -mm after proper review
of the full patchset.

Thanks,
Andrea

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