linux-ext4 - Re: [PATCH V2] uapi: fix statx attribute value overlap for DAX & MOUNT

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Date:   Wed, 2 Dec 2020 20:06:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     David Howells <dhowells@...hat.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Eric Sandeen <sandeen@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Miklos Szeredi <mszeredi@...hat.com>,
        linux-fsdevel@...r.kernel.org,
        linux-man <linux-man@...r.kernel.org>,
        linux-kernel@...r.kernel.org, xfs <linux-xfs@...r.kernel.org>,
        linux-ext4@...r.kernel.org, Xiaoli Feng <xifeng@...hat.com>
Subject: Re: [PATCH V2] uapi: fix statx attribute value overlap for DAX &
 MOUNT_ROOT

On Wed, Dec 02, 2020 at 06:41:43PM +0100, Miklos Szeredi wrote:
> On Wed, Dec 2, 2020 at 5:24 PM David Howells <dhowells@...hat.com> wrote:
> >
> > Miklos Szeredi <miklos@...redi.hu> wrote:
> >
> > > Stable cc also?
> > >
> > > Cc: <stable@...r.kernel.org> # 5.8
> >
> > That seems to be unnecessary, provided there's a Fixes: tag.
> 
> Is it?
> 
> Fixes: means it fixes a patch, Cc: stable means it needs to be
> included in stable kernels.  The two are not necessarily the same.
> 
> Greg?

You are correct.  cc: stable, as is documented in
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
ensures that the patch will get merged into the stable tree.

Fixes: is independent of it.  It's great to have for stable patches so
that I know how far back to backport patches.

We do scan all commits for Fixes: tags that do not have cc: stable, and
try to pick them up when we can and have the time to do so.  But it's
not guaranteed at all that this will happen.

I don't know why people keep getting confused about this, we don't
document the "Fixes: means it goes to stable" anywhere...

thanks,

greg k-h