Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Michal Suchanek <msuchanek@suse.de>
To:     linuxppc-dev@lists.ozlabs.org
Cc:     Michal Suchanek <msuchanek@suse.de>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Oleg Nesterov <oleg@redhat.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <christian@brauner.io>,
        Nicholas Piggin <npiggin@gmail.com>,
        Allison Randal <allison@lohutok.net>,
        "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Breno Leitao <leitao@debian.org>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        Claudio Carvalho <cclaudio@linux.ibm.com>,
        Russell Currey <ruscur@russell.cc>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Firoz Khan <firoz.khan@linaro.org>,
        Dmitry Vyukov <dvyukov@google.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Hari Bathini <hbathini@linux.ibm.com>,
        Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
        Nicolai Stange <nstange@suse.de>,
        Valentin Schneider <valentin.schneider@arm.com>,
        Diana Craciun <diana.craciun@nxp.com>,
        Daniel Axtens <dja@axtens.net>,
        Michael Neuling <mikey@neuling.org>,
        Gustavo Romero <gromero@linux.ibm.com>,
        Mathieu Malaterre <malat@debian.org>,
        "Steven Rostedt" <rostedt@goodmis.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        David Howells <dhowells@redhat.com>,
        Brajeswar Ghosh <brajeswar.linux@gmail.com>,
        Jagadeesh Pagadala <jagdsh.linux@gmail.com>,
        David Hildenbrand <david@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 rebase 32/34] powerpc/64: Make COMPAT user-selectable disabled on littleendian by default.
Date:   Wed, 27 Nov 2019 11:39:08 +0100
Message-Id: <760dd63d2035d3707a9ba85c4b667dc79ff46caf.1574803685.git.msuchanek@suse.de>
In-Reply-To: <cover.1574803684.git.msuchanek@suse.de>
References: <cover.1574803684.git.msuchanek@suse.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On bigendian ppc64 it is common to have 32bit legacy binaries but much
less so on littleendian.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e446bb5b3f8d..fabae186eea7 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -267,8 +267,9 @@ config PANIC_TIMEOUT
 	default 180
 
 config COMPAT
-	bool
-	default y if PPC64
+	bool "Enable support for 32bit binaries"
+	depends on PPC64
+	default y if !CPU_LITTLE_ENDIAN
 	select COMPAT_BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
 	select COMPAT_OLD_SIGACTION
-- 
2.23.0