[PATCH] Remove <linux/mm.h> from <linux/vmalloc.h>

This removes <linux/mm.h> from <linux/vmalloc.h>.

This then goes and fixes all of the files (x86 and PPC) which relied on
implicit includes which don't happen anymore.  This also takes
<linux/kdev_t.h> out of fs/mpage.c and puts it into include/linux/bio.h
where it belongs since <linux/bio.h> references 'kdev_t' directly.

A quick summary of the of the added includes:
arch/i386/kernel/microcode.c: needs extern for num_physpages, in linux/mm.h
include/linux/spinlock.h: local_irq* is defined in <asm/system.h> but
this was never directly included.

arch/i386/kernel/microcode.c

@@ -67,6 +67,7 @@
 #include <linux/miscdevice.h>
 #include <linux/devfs_fs_kernel.h>
 #include <linux/spinlock.h>
+#include <linux/mm.h>
 
 #include <asm/msr.h>
 #include <asm/uaccess.h>

fs/mpage.c

@@ -12,7 +12,6 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/kdev_t.h>
 #include <linux/bio.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>

include/asm-i386/pci.h

@@ -4,6 +4,7 @@
 #include <linux/config.h>
 
 #ifdef __KERNEL__
+#include <linux/mm.h>		/* for struct page */
 
 /* Can be used to override the logic in pci_scan_bus for skipping
    already-configured bus numbers - to be used for buggy BIOSes

include/asm-i386/pgalloc.h

@@ -5,6 +5,7 @@
 #include <asm/processor.h>
 #include <asm/fixmap.h>
 #include <linux/threads.h>
+#include <linux/mm.h>		/* for struct page */
 
 #define pmd_populate_kernel(mm, pmd, pte) \
 		set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))

include/linux/bio.h

@@ -20,6 +20,7 @@
 #ifndef __LINUX_BIO_H
 #define __LINUX_BIO_H
 
+#include <linux/kdev_t.h>
 /* Platforms may set this to teach the BIO layer about IOMMU hardware. */
 #include <asm/io.h>
 #ifndef BIO_VMERGE_BOUNDARY

include/linux/spinlock.h

@@ -7,6 +7,8 @@
 #include <linux/thread_info.h>
 #include <linux/kernel.h>
 
+#include <asm/system.h>
+
 /*
  * These are the generic versions of the spinlocks and read-write
  * locks..

include/linux/vmalloc.h

 #ifndef __LINUX_VMALLOC_H
 #define __LINUX_VMALLOC_H
 
-#include <linux/mm.h>
 #include <linux/spinlock.h>
 
 #include <asm/pgtable.h>