fs: make binfmt support for #! scripts modular and removable

Add a new configuration option CONFIG_BINFMT_SCRIPT to configure support
for interpreted scripts starting with "#!"; allow compiling out that
support, or building it as a module.  Embedded systems running exclusively
compiled binaries could leave this support out, and systems that don't
need scripts before mounting the root filesystem can build this as a
module.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/fs/Makefile b/fs/Makefile
index 3b2c76759ec9..5e67e57b59dc 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -34,10 +34,7 @@ obj-$(CONFIG_COMPAT)		+= compat.o compat_ioctl.o
 obj-$(CONFIG_BINFMT_AOUT)       += binfmt_aout.o
 obj-$(CONFIG_BINFMT_EM86)       += binfmt_em86.o
 obj-$(CONFIG_BINFMT_MISC)       += binfmt_misc.o
-
-# binfmt_script is always there
-obj-y                           += binfmt_script.o
-
+obj-$(CONFIG_BINFMT_SCRIPT)     += binfmt_script.o
 obj-$(CONFIG_BINFMT_ELF)        += binfmt_elf.o
 obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
 obj-$(CONFIG_BINFMT_ELF_FDPIC)  += binfmt_elf_fdpic.o