From: Michal Suchanek <msuchanek@suse.de>
Date: Fri, 20 Mar 2020 10:20:17 +0000 (+0100)
Subject: powerpc/64: Make COMPAT user-selectable disabled on littleendian by default.
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6e944aed8859d3b2de32ddb86748db9aefa43667;p=linux.git

powerpc/64: Make COMPAT user-selectable disabled on littleendian by default.

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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/41393d6e895b0d3a47ee62f8f51e1cf888ad6226.1584699455.git.msuchanek@suse.de
---

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 497b7d0b2d7ed..29d00b3959b9c 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