From a8fcd8b192bb15debe1db276e073c6ba9a3fc953 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Mon, 16 Mar 2015 16:32:23 +0000 Subject: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size With binutils 2.25 the default alignment for 32bit arm sections changed to have everything 64k aligned. Armv7 binaries built with this binutils version run successfully on an arm64 system. Since effectively there is now the chance to run armv7 code on arm64 even with 64k page size, it doesn't make sense to block people from enabling CONFIG_COMPAT on those configurations. Signed-off-by: Alexander Graf Signed-off-by: Will Deacon --- arch/arm64/Kconfig | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 0d46debbc9a7..c102d92aad40 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -674,7 +674,7 @@ source "fs/Kconfig.binfmt" config COMPAT bool "Kernel support for 32-bit EL0" - depends on !ARM64_64K_PAGES + depends on !ARM64_64K_PAGES || EXPERT select COMPAT_BINFMT_ELF select HAVE_UID16 select OLD_SIGSUSPEND3 @@ -685,6 +685,10 @@ config COMPAT the user helper functions, VFP support and the ptrace interface are handled appropriately by the kernel. + If you also enabled CONFIG_ARM64_64K_PAGES, please be aware that you + will only be able to execute AArch32 binaries that were compiled with + 64k aligned segments. + If you want to execute 32-bit userspace applications, say Y. config SYSVIPC_COMPAT