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 497b7d0b2d7edf7cbefe4c1a86f678502c3fd8dc..29d00b3959b9c9e808daf5bdd9a265490a54f41a 100644 (file)
--- 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