x86: compat_binfmt_elf Kconfig

This adds Kconfig and Makefile bits to build fs/compat_binfmt_elf.c,
just added.  Each arch that wants to use this file needs to add a
"select COMPAT_BINFMT_ELF" line in its Kconfig bits that enable COMPAT.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 5 insertions, 0 deletions

diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index d4fc6095466d..7c3d5f923da1 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -23,6 +23,10 @@ config BINFMT_ELF
           ld.so (check the file <file:Documentation/Changes> for location and
           latest version).
 
+config COMPAT_BINFMT_ELF
+        bool
+        depends on COMPAT && MMU
+
 config BINFMT_ELF_FDPIC
         bool "Kernel support for FDPIC ELF binaries"
         default y
diff --git a/fs/Makefile b/fs/Makefile
index 500cf15cdb4b..1e7a11bd4da1 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_BINFMT_MISC)	+= binfmt_misc.o
 obj-y                           += binfmt_script.o
 
 obj-$(CONFIG_BINFMT_ELF)        += binfmt_elf.o
+obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
 obj-$(CONFIG_BINFMT_ELF_FDPIC)  += binfmt_elf_fdpic.o
 obj-$(CONFIG_BINFMT_SOM)        += binfmt_som.o
 obj-$(CONFIG_BINFMT_FLAT)       += binfmt_flat.o