Re: [PATCH 4.14 21/72] locking/qspinlock: Ensure node is initialised before updating prev->next

[Greg Kroah-Hartman]

On Thu, Dec 20, 2018 at 12:19:04PM +0000, Sudip Mukherjee wrote:
> Hi Greg,
> 
> On Thu, Dec 20, 2018 at 9:27 AM Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > 4.14-stable review patch.  If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > commit 95bcade33a8af38755c9b0636e36a36ad3789fe6 upstream.
> 
> It seems 9d4646d14d51 ("locking/qspinlock: Elide back-to-back RELEASE
> operations with smp_wmb()") is improving the fix. Is it worth to take
> this also?

If someone could test that this really does help things out, I would be
glad to take it :)

thanks,

greg k-h