[BLOCK] Move all core block layer code to new block/ directory

drivers/block/ is right now a mix of core and driver parts. Lets move
the core parts to a new top level directory. Al will move the fs/
related block parts to block/ next.
Signed-off-by: Jens Axboe <axboe@suse.de>

Makefile

@@ -582,7 +582,7 @@ export MODLIB
 
 
 ifeq ($(KBUILD_EXTMOD),)
-core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/
+core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 
 vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \

block/Kconfig

+#
+# Block layer core configuration
+#
+#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
+#for instance.
+config LBD
+	bool "Support for Large Block Devices"
+	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
+	help
+	  Say Y here if you want to attach large (bigger than 2TB) discs to
+	  your machine, or if you want to have a raid or loopback device
+	  bigger than 2TB.  Otherwise say N.
+
+source block/Kconfig.iosched

block/Makefile

+#
+# Makefile for the kernel block layer
+#
+
+obj-y	:= elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o
+
+obj-$(CONFIG_IOSCHED_NOOP)	+= noop-iosched.o
+obj-$(CONFIG_IOSCHED_AS)	+= as-iosched.o
+obj-$(CONFIG_IOSCHED_DEADLINE)	+= deadline-iosched.o
+obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o

drivers/block/Kconfig

@@ -409,16 +409,6 @@ config BLK_DEV_INITRD
 	  for details.
 
 
-#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
-#for instance.
-config LBD
-	bool "Support for Large Block Devices"
-	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
-	help
-	  Say Y here if you want to attach large (bigger than 2TB) discs to
-	  your machine, or if you want to have a raid or loopback device
-	  bigger than 2TB.  Otherwise say N.
-
 config CDROM_PKTCDVD
 	tristate "Packet writing on CD/DVD media"
 	depends on !UML
@@ -455,8 +445,6 @@ config CDROM_PKTCDVD_WCACHE
 
 source "drivers/s390/block/Kconfig"
 
-source "drivers/block/Kconfig.iosched"
-
 config ATA_OVER_ETH
 	tristate "ATA over Ethernet support"
 	depends on NET

drivers/block/Makefile

@@ -4,21 +4,7 @@
 # 12 June 2000, Christoph Hellwig <hch@infradead.org>
 # Rewritten to use lists instead of if-statements.
 # 
-# Note : at this point, these files are compiled on all systems.
-# In the future, some of these should be built conditionally.
-#
-
-#
-# NOTE that ll_rw_blk.c must come early in linkage order - it starts the
-# kblockd threads
-#
-
-obj-y	:= elevator.o ll_rw_blk.o ioctl.o genhd.o scsi_ioctl.o
 
-obj-$(CONFIG_IOSCHED_NOOP)	+= noop-iosched.o
-obj-$(CONFIG_IOSCHED_AS)	+= as-iosched.o
-obj-$(CONFIG_IOSCHED_DEADLINE)	+= deadline-iosched.o
-obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o
 obj-$(CONFIG_MAC_FLOPPY)	+= swim3.o
 obj-$(CONFIG_BLK_DEV_FD)	+= floppy.o
 obj-$(CONFIG_BLK_DEV_FD98)	+= floppy98.o

init/Kconfig

@@ -501,3 +501,7 @@ config STOP_MACHINE
 	help
 	  Need stop_machine() primitive.
 endmenu
+
+menu "Block layer"
+source "block/Kconfig"
+endmenu