linux-kernel - Re: [for-next][PATCH 08/18] parisc: function_graph: Simplify with function_graph

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Date:   Fri, 23 Nov 2018 12:12:53 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Helge Deller <deller@....de>
Cc:     Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        linux-parisc@...r.kernel.org, stable@...nel.org,
        stable@...r.kernel.org
Subject: Re: [for-next][PATCH 08/18] parisc: function_graph: Simplify with
 function_graph_entry()

On Fri, 23 Nov 2018 10:06:05 +0100
Helge Deller <deller@....de> wrote:


> > How should we proceed with this patch?  
> 
> My suggestion, although I didn't looked too much on it:
> Apply it to v4.9 and higher only.
> I think I started fixing trace functionality on parisc around 4.6,
> which is probably why applying it fails on v4.4 and v3.x

The problem is, if you backport the generic patches, it will completely
break any arch that isn't updated. This also includes the archs that
are no longer supported upstream, as they were not changed to handle
the generic updates either.

-- Steve