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From: Michal Suchanek <msuchanek@suse.de>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v9 7/8] powerpc/64: Make COMPAT user-selectable disabled on
 littleendian by default.
Date: Fri, 13 Sep 2019 14:58:01 +0200
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Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
 David Hildenbrand <david@redhat.com>,
 Heiko Carstens <heiko.carstens@de.ibm.com>, Paul Mackerras <paulus@samba.org>,
 Breno Leitao <leitao@debian.org>, Michael Neuling <mikey@neuling.org>,
 Diana Craciun <diana.craciun@nxp.com>, Firoz Khan <firoz.khan@linaro.org>,
 Hari Bathini <hbathini@linux.ibm.com>, Michal Suchanek <msuchanek@suse.de>,
 Joel Stanley <joel@jms.id.au>, Arnd Bergmann <arnd@arndb.de>,
 Nicholas Piggin <npiggin@gmail.com>, Alexander Viro <viro@zeniv.linux.org.uk>,
 Thomas Gleixner <tglx@linutronix.de>, Allison Randal <allison@lohutok.net>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org,
 "Eric W. Biederman" <ebiederm@xmission.com>,
 Andrew Donnellan <andrew.donnellan@au1.ibm.com>, linux-fsdevel@vger.kernel.org,
 Andrew Morton <akpm@linux-foundation.org>
Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Sender: "Linuxppc-dev"
 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

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>
---
v3: make configurable
---
 arch/powerpc/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5bab0bb6b833..b0339e892329 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -264,8 +264,9 @@ 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