linux-kernel - Re: backport Rewrite sync_core() to use IRET-to-self to stable kernels?

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Message-ID: <20180124090107.GB30613@kroah.com>
Date:   Wed, 24 Jan 2018 10:01:07 +0100
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     "Zhang, Ning A" <ning.a.zhang@...el.com>
Cc:     Andy Lutomirski <luto@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: backport Rewrite sync_core() to use IRET-to-self to stable
 kernels?

On Wed, Jan 24, 2018 at 08:19:44AM +0000, Zhang, Ning A wrote:
> Thanks Greg, Andy
> 
> How about c198b121b1a1d7a7171770c634cd49191bac4477?

Why do you think that is needed in the older stable kernels?  What
problem does it solve?  Do any distros have this patch in their kernels?

thanks,

greg k-h