The following fixes were required for me to compile 2.3.47 with LVM. 
-- Michael Marxmeier mike@msede.com

--- linux/fs/partitions/check.c.orig	Wed Feb 23 01:46:02 2000
+++ linux/fs/partitions/check.c	Wed Feb 23 01:47:22 2000
@@ -71,6 +71,11 @@
 	NULL
 };
 
+#if defined CONFIG_BLK_DEV_LVM || defined CONFIG_BLK_DEV_LVM_MODULE
+#include <linux/lvm.h>
+void ( *lvm_hd_name_ptr) ( char *, int) = NULL;
+#endif
+
 /*
  * disk_name() is used by genhd.c and blkpg.c.
  * It formats the devicename of the indicated disk into
@@ -97,6 +102,13 @@
 	 * This requires special handling here.
 	 */
 	switch (hd->major) {
+#if defined CONFIG_BLK_DEV_LVM || defined CONFIG_BLK_DEV_LVM_MODULE
+		case LVM_BLK_MAJOR:
+			*buf = 0;
+			if ( lvm_hd_name_ptr != NULL)
+				( lvm_hd_name_ptr) ( buf, minor);
+			return buf;
+#endif
 		case IDE9_MAJOR:
 			unit += 2;
 		case IDE8_MAJOR:
--- linux/fs/block_dev.c.orig	Wed Feb 23 01:45:02 2000
+++ linux/fs/block_dev.c	Wed Feb 23 01:45:27 2000
@@ -313,7 +313,7 @@
  *	since the vma has no handle.
  */
  
-static int block_fsync(struct file *filp, struct dentry *dentry)
+int block_fsync(struct file *filp, struct dentry *dentry)
 {
 	return fsync_dev(dentry->d_inode->i_rdev);
 }
@@ -650,7 +650,7 @@
 	return ret;
 }
 
-static int blkdev_close(struct inode * inode, struct file * filp)
+int blkdev_close(struct inode * inode, struct file * filp)
 {
 	return blkdev_put(inode->i_bdev, BDEV_FILE);
 }
--- linux/kernel/ksyms.c.orig	Wed Feb 23 01:49:22 2000
+++ linux/kernel/ksyms.c	Wed Feb 23 01:50:48 2000
@@ -71,6 +71,10 @@
 };
 #endif
 
+#ifdef CONFIG_BLK_DEV_LVM_MODULE
+extern void (*lvm_hd_name_ptr) ( char*, int);
+EXPORT_SYMBOL(lvm_hd_name_ptr);
+#endif
 
 #ifdef CONFIG_KMOD
 EXPORT_SYMBOL(request_module);
@@ -159,6 +163,8 @@
 EXPORT_SYMBOL(free_kiovec);
 EXPORT_SYMBOL(brw_kiovec);
 EXPORT_SYMBOL(alloc_kiovec);
+EXPORT_SYMBOL(expand_kiobuf);
+EXPORT_SYMBOL(unmap_kiobuf);
 EXPORT_SYMBOL(get_empty_filp);
 EXPORT_SYMBOL(init_private_file);
 EXPORT_SYMBOL(filp_open);
@@ -228,6 +234,7 @@
 EXPORT_SYMBOL(page_follow_link);
 EXPORT_SYMBOL(page_symlink_inode_operations);
 EXPORT_SYMBOL(block_symlink);
+EXPORT_SYMBOL(block_fsync);
 
 /* for stackable file systems (lofs, wrapfs, etc.) */
 EXPORT_SYMBOL(add_to_page_cache);
@@ -263,6 +270,7 @@
 EXPORT_SYMBOL(sync_dev);
 EXPORT_SYMBOL(devfs_register_partitions);
 EXPORT_SYMBOL(blkdev_open);
+EXPORT_SYMBOL(blkdev_close);
 EXPORT_SYMBOL(blkdev_get);
 EXPORT_SYMBOL(blkdev_put);
 EXPORT_SYMBOL(ioctl_by_bdev);
--- linux/include/linux/fs.h.orig	Wed Feb 23 01:43:30 2000
+++ linux/include/linux/fs.h	Wed Feb 23 01:44:16 2000
@@ -795,6 +795,8 @@
 extern struct block_device *bdget(dev_t);
 extern void bdput(struct block_device *);
 extern int blkdev_open(struct inode *, struct file *);
+extern int blkdev_close(struct inode * inode, struct file * filp);
+extern int block_fsync(struct file *filp, struct dentry *dentry);
 extern struct file_operations def_blk_fops;
 extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
 extern int blkdev_get(struct block_device *, mode_t, unsigned, int);
--- linux/include/linux/blk.h.orig	Wed Feb 23 02:01:19 2000
+++ linux/include/linux/blk.h	Wed Feb 23 02:01:45 2000
@@ -51,6 +51,7 @@
 extern int xd_init(void);
 extern int mfm_init(void);
 extern int loop_init(void);
+extern int lvm_init(void);
 extern int md_init(void);
 extern int ap_init(void);
 extern int ddv_init(void);
--- linux/drivers/block/Config.in.orig	Mon Feb 21 07:00:16 2000
+++ linux/drivers/block/Config.in	Mon Feb 21 07:00:55 2000
@@ -202,6 +202,12 @@
 if [ "$CONFIG_NET" = "y" ]; then
    tristate 'Network block device support' CONFIG_BLK_DEV_NBD
 fi
+
+tristate 'Logical volume manager (LVM) support' CONFIG_BLK_DEV_LVM N
+if [ "$CONFIG_BLK_DEV_LVM" != "n" ]; then
+  bool '   LVM information in proc filesystem' CONFIG_LVM_PROC_FS Y
+fi
+
 bool 'Multiple devices driver support' CONFIG_BLK_DEV_MD
 if [ "$CONFIG_BLK_DEV_MD" = "y" ]; then
    tristate '  Linear (append) mode' CONFIG_MD_LINEAR
--- linux/drivers/block/ll_rw_blk.c.orig	Mon Feb 21 07:18:02 2000
+++ linux/drivers/block/ll_rw_blk.c	Wed Feb 23 02:03:58 2000
@@ -1214,6 +1214,9 @@
 #ifdef CONFIG_SJCD
 	sjcd_init();
 #endif CONFIG_SJCD
+#ifdef CONFIG_BLK_DEV_LVM
+       lvm_init();
+#endif
 #ifdef CONFIG_BLK_DEV_MD
 	md_init();
 #endif CONFIG_BLK_DEV_MD
@@ -1233,8 +1236,8 @@
 EXPORT_SYMBOL(end_that_request_first);
 EXPORT_SYMBOL(end_that_request_last);
 EXPORT_SYMBOL(blk_init_queue);
+EXPORT_SYMBOL(blk_queue_make_request);
 EXPORT_SYMBOL(blk_cleanup_queue);
 EXPORT_SYMBOL(blk_queue_headactive);
 EXPORT_SYMBOL(blk_queue_pluggable);
-EXPORT_SYMBOL(blk_queue_make_request);
 EXPORT_SYMBOL(generic_make_request);
--- linux/drivers/block/lvm.c.orig	Wed Feb 23 02:14:28 2000
+++ linux/drivers/block/lvm.c	Wed Feb 23 02:14:42 2000
@@ -287,7 +287,7 @@
 static char pv_name[NAME_LEN];
 /* static char rootvg[NAME_LEN] = { 0, }; */
 static uint lv_open = 0;
-static const char *const lvm_name = LVM_NAME;
+const char *const lvm_name = LVM_NAME;
 static int lock = 0;
 static int loadtime = 0;
 static uint vg_count = 0;
--- linux/arch/i386/kernel/mtrr.c.orig	Wed Feb 23 02:10:27 2000
+++ linux/arch/i386/kernel/mtrr.c	Wed Feb 23 02:11:13 2000
@@ -1838,7 +1838,7 @@
     proc_root_mtrr = create_proc_entry ("mtrr", S_IWUSR | S_IRUGO, &proc_root);
     proc_root_mtrr->ops = &proc_mtrr_inode_operations;
 #endif
-#ifdev CONFIG_DEVFS_FS
+#ifdef CONFIG_DEVFS_FS
     devfs_handle = devfs_register (NULL, "cpu/mtrr", 0, DEVFS_FL_DEFAULT, 0, 0,
 				   S_IFREG | S_IRUGO | S_IWUSR, 0, 0,
 				   &mtrr_fops, NULL);