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    SubjectRe: [PATCH] tools/memory-model: remove rb-dep, smp_read_barrier_depends, and lockless_dereference

    * Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

    > On Wed, Feb 21, 2018 at 10:00:20AM -0500, Alan Stern wrote:
    > > On Fri, 16 Feb 2018, Paul E. McKenney wrote:
    > >
    > > > On Fri, Feb 16, 2018 at 05:22:55PM -0500, Alan Stern wrote:
    > > > > Since commit 76ebbe78f739 ("locking/barriers: Add implicit
    > > > > smp_read_barrier_depends() to READ_ONCE()") was merged for the 4.15
    > > > > kernel, it has not been necessary to use smp_read_barrier_depends().
    > > > > Similarly, commit 59ecbbe7b31c ("locking/barriers: Kill
    > > > > lockless_dereference()") removed lockless_dereference() from the
    > > > > kernel.
    > > > >
    > > > > Since these primitives are no longer part of the kernel, they do not
    > > > > belong in the Linux Kernel Memory Consistency Model. This patch
    > > > > removes them, along with the internal rb-dep relation, and updates the
    > > > > revelant documentation.
    > > > >
    > > > > Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
    > > >
    > > > I queued this, but would welcome an update that addressed Akira's
    > > > feedback as appropriate.
    > >
    > > Is it too late to send a v2 of this patch? I didn't want to do it
    > > before now because the issue raised by Andrea wasn't settled. (Some
    > > could claim that it still isn't fully settled...)
    >
    > Would you be willing to send a delta patch? I can then place it directly
    > on top of your original patch, and once it settles out, I can ask Ingo
    > if he is willing to update the patch in -tip.

    It would be better to have followup fixes as separate patches. I applied the
    current set of fixes/improvements today to help move things along - it's all
    advancing very nicely!

    Thanks,

    Ingo

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