linux-kernel - Re: [PATCH 1/2] futex: mark futex_detect

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Date:   Thu, 17 Dec 2020 21:03:02 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Guo Ren <guoren@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
        Marco Elver <elver@...gle.com>, Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-csky@...r.kernel.org,
        sparclinux <sparclinux@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 1/2] futex: mark futex_detect_cmpxchg() as 'noinline'

Hi Arnd,

> > I think we would be better served dropping support for sun4m and sun4d
> > from the kernel.
> 
> This seems appropriate as well to me.

I did a quick hack:
20 files changed, 40 insertions(+), 3051 deletions(-)

All the leon stuff is kept and there is room for more cleaning up.
The kernel can build a sparc32_defconfig with the Gaisler toochain.
This was a one hour quick hack that I cannot commit - it needs to be
split up to allow some resemble of review.

And it touched only arch/sparc/ - no sparc32 specific drivers were
dropped.

If we decide to chase this and we can drop sun4m/sun4d then maintaining
leon will be simpler as a nice side effect.

	Sam