do_mounts: Move CONFIG_BLK_DEV_RAM stuff into own file

There's still an #ifdef in there for CONFIG_BLK_DEV_INITRD, but at
some point it just gets too many files, so accept that for now.
There's also a #define BUILD_CRAMDISK in there, which should be either
made a config option or removed...

init/Makefile

@@ -4,7 +4,8 @@
 
 obj-y			:= main.o version.o do_mounts.o initramfs.o
 obj-$(CONFIG_DEVFS_FS)		+= do_mounts_devfs.o
-obj-$(CONFIG_BLK_DEV_MD)+= do_mounts_md.o
+obj-$(CONFIG_BLK_DEV_RAM)	+= do_mounts_rd.o
+obj-$(CONFIG_BLK_DEV_MD)	+= do_mounts_md.o
 
 # files to be removed upon make clean
 clean-files := ../include/linux/compile.h

init/do_mounts.h

@@ -6,16 +6,27 @@
 #include <linux/unistd.h>
 #include <linux/slab.h>
 #include <linux/mount.h>
+#include <linux/blk.h>
+#include <linux/root_dev.h>
 
 asmlinkage long sys_unlink(const char *name);
 asmlinkage long sys_mknod(const char *name, int mode, dev_t dev);
 asmlinkage long sys_newstat(char * filename, struct stat * statbuf);
 asmlinkage long sys_ioctl(int fd, int cmd, unsigned long arg);
+asmlinkage long sys_mkdir(const char *name, int mode);
+asmlinkage long sys_rmdir(const char *name);
+asmlinkage long sys_chdir(const char *name);
+asmlinkage long sys_fchdir(int fd);
+asmlinkage long sys_chroot(const char *name);
 asmlinkage long sys_mount(char *dev_name, char *dir_name, char *type,
 				 unsigned long flags, void *data);
 asmlinkage long sys_umount(char *name, int flags);
 
 dev_t name_to_dev_t(char *name);
+void  change_floppy(char *fmt, ...);
+void  mount_block_root(char *name, int flags);
+void  mount_root(void);
+extern int root_mountflags;
 
 #ifdef CONFIG_DEVFS_FS
 
@@ -26,7 +37,6 @@ int  create_dev(char *name, dev_t dev, char *devfs_name);
 #else
 
 static inline void mount_devfs(void) {}
-
 static inline void umount_devfs(const char *path) {}
 
 static inline int create_dev(char *name, dev_t dev, char *devfs_name)
@@ -37,6 +47,28 @@ static inline int create_dev(char *name, dev_t dev, char *devfs_name)
 
 #endif
 
+#ifdef CONFIG_BLK_DEV_RAM
+
+int __init rd_load_disk(int n);
+int __init rd_load_image(char *from);
+
+#else
+
+static inline int rd_load_disk(int n) { return 0; }
+static inline int rd_load_image(char *from) { return 0; }
+
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+
+int __init initrd_load(void);
+
+#else
+
+static inline int initrd_load(void) { return 0; }
+
+#endif
+
 #ifdef CONFIG_BLK_DEV_MD
 
 void md_run_setup(void);