[PATCH] sort the devres mess out

* Split the implementation-agnostic stuff in separate files.
* Make sure that targets using non-default request_irq() pull
  kernel/irq/devres.o
* Introduce new symbols (HAS_IOPORT and HAS_IOMEM) defaulting to positive;
  allow architectures to turn them off (we needed these symbols anyway for
  dependencies of quite a few drivers).
* protect the ioport-related parts of lib/devres.o with CONFIG_HAS_IOPORT.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/m68k/Kconfig

@@ -42,6 +42,9 @@ config ARCH_MAY_HAVE_PC_FDC
 	depends on Q40 || (BROKEN && SUN3X)
 	default y
 
+config NO_IOPORT
+	def_bool y
+
 mainmenu "Linux/68k Kernel Configuration"
 
 source "init/Kconfig"

arch/m68k/kernel/Makefile

@@ -10,7 +10,9 @@ endif
 extra-y	+= vmlinux.lds
 
 obj-y	:= entry.o process.o traps.o ints.o signal.o ptrace.o \
-	   sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o
+	   sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o devres.o
+
+devres-y = ../../../kernel/irq/devres.o
 
 obj-$(CONFIG_PCI)	+= bios32.o
 obj-$(CONFIG_MODULES)	+= module.o