[PATCH] disallow modular binfmt_elf32

Currently most architectures either always build binfmt_elf32 in the kernel
image or make it a boolean option.  Only sparc64 and s390 allow to build it
modularly.  This patch turns the option into a boolean aswell because elf
requires various symbols that shouldn't be available to modules.  The most
urgent one is tasklist_lock whos export this patch series kills, but there
are others like force_sgi aswell.

Note that sparc doesn't allow a modular 32bit a.out handler either, and
that would be the more useful case as only few people want 32bit sunos
compatibility and 99.9% of all sparc64 users need 32bit linux native elf
support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: "David S. Miller" <davem@davemloft.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/s390/Kconfig

@@ -119,7 +119,7 @@ config SYSVIPC_COMPAT
 	default y
 
 config BINFMT_ELF32
-	tristate "Kernel support for 31 bit ELF binaries"
+	bool "Kernel support for 31 bit ELF binaries"
 	depends on COMPAT
 	help
 	  This allows you to run 32-bit Linux/ELF binaries on your zSeries

arch/sparc64/Kconfig

@@ -334,7 +334,7 @@ config COMPAT
 	default y
 
 config BINFMT_ELF32
-	tristate "Kernel support for 32-bit ELF binaries"
+	bool "Kernel support for 32-bit ELF binaries"
 	depends on SPARC32_COMPAT
 	help
 	  This allows you to run 32-bit Linux/ELF binaries on your Ultra.