From mboxrd@z Thu Jan  1 00:00:00 1970
From: will.deacon@arm.com (Will Deacon)
Date: Tue, 5 May 2015 11:51:11 +0100
Subject: [PATCH] arm64: Preserve the user r/w register tpidr_el0 on
 context switch and fork in compat mode
In-Reply-To: <55464BB2.7030401@dawncrow.de>
References: <55464BB2.7030401@dawncrow.de>
Message-ID: <20150505105111.GB1550@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Sun, May 03, 2015 at 05:24:18PM +0100, Andr? Hentschel wrote:
> From: Andr? Hentschel <nerv@dawncrow.de>
> 
> Since commit a4780adeefd042482f624f5e0d577bf9cdcbb760 the user writeable TLS
> register on ARM is preserved per thread.
> 
> This patch does it analogous to the ARM patch, but for compat mode on ARM64.
> 
> Signed-off-by: Andr? Hentschel <nerv@dawncrow.de>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Jonathan Austin <jonathan.austin@arm.com> 
> 
> ---
> This patch is against Linux 4.1-rc1 (b787f68c36d49bb1d9236f403813641efa74a031)

Curious, but why do you need this? iirc, we added this for arch/arm/ because
of some windows rt (?) emulation in wine. Is that still the case here and is
anybody actually using that?

Will