o a couple of patches we'll need for deviec-mapper

driver/device-mapper/patches/00_bh-async-3

@@ -0,0 +1,88 @@
+diff -urN 2.4.7pre6/fs/buffer.c bh_async/fs/buffer.c
+--- 2.4.7pre6/fs/buffer.c	Wed Jul 11 06:03:18 2001
++++ bh_async/fs/buffer.c	Thu Jul 12 07:55:08 2001
+@@ -827,10 +827,11 @@
+ 	 * that unlock the page..
+ 	 */
+ 	spin_lock_irqsave(&page_uptodate_lock, flags);
++	mark_buffer_async(bh, 0);
+ 	unlock_buffer(bh);
+ 	tmp = bh->b_this_page;
+ 	while (tmp != bh) {
+-		if (tmp->b_end_io == end_buffer_io_async && buffer_locked(tmp))
++		if (buffer_async(tmp) && buffer_locked(tmp))
+ 			goto still_busy;
+ 		tmp = tmp->b_this_page;
+ 	}
+@@ -862,8 +863,9 @@
+ 	return;
+ }
+ 
+-void set_buffer_async_io(struct buffer_head *bh) {
++inline void set_buffer_async_io(struct buffer_head *bh) {
+     bh->b_end_io = end_buffer_io_async ;
++    mark_buffer_async(bh, 1);
+ }
+ 
+ /*
+@@ -1553,7 +1555,7 @@
+ 	/* Stage 2: lock the buffers, mark them clean */
+ 	do {
+ 		lock_buffer(bh);
+-		bh->b_end_io = end_buffer_io_async;
++		set_buffer_async_io(bh);
+ 		get_bh(bh);
+ 		set_bit(BH_Uptodate, &bh->b_state);
+ 		clear_bit(BH_Dirty, &bh->b_state);
+@@ -1755,7 +1757,7 @@
+ 	for (i = 0; i < nr; i++) {
+ 		struct buffer_head * bh = arr[i];
+ 		lock_buffer(bh);
+-		bh->b_end_io = end_buffer_io_async;
++		set_buffer_async_io(bh);
+ 		get_bh(bh);
+ 	}
+ 
+@@ -2200,7 +2202,7 @@
+ 		lock_buffer(bh);
+ 		bh->b_blocknr = *(b++);
+ 		set_bit(BH_Mapped, &bh->b_state);
+-		bh->b_end_io = end_buffer_io_async;
++		set_buffer_async_io(bh);
+ 		get_bh(bh);
+ 		bh = bh->b_this_page;
+ 	} while (bh != head);
+diff -urN 2.4.7pre6/include/linux/fs.h bh_async/include/linux/fs.h
+--- 2.4.7pre6/include/linux/fs.h	Wed Jul 11 06:03:19 2001
++++ bh_async/include/linux/fs.h	Thu Jul 12 07:54:26 2001
+@@ -215,6 +215,7 @@
+ 	BH_Mapped,	/* 1 if the buffer has a disk mapping */
+ 	BH_New,		/* 1 if the buffer is new and not yet written out */
+ 	BH_Protected,	/* 1 if the buffer is protected */
++	BH_Async,	/* 1 if the buffer is under end_buffer_io_async I/O */
+ 
+ 	BH_PrivateStart,/* not a state bit, but the first bit available
+ 			 * for private allocation by other entities
+@@ -275,6 +276,7 @@
+ #define buffer_mapped(bh)	__buffer_state(bh,Mapped)
+ #define buffer_new(bh)		__buffer_state(bh,New)
+ #define buffer_protected(bh)	__buffer_state(bh,Protected)
++#define buffer_async(bh)	__buffer_state(bh,Async)
+ 
+ #define bh_offset(bh)		((unsigned long)(bh)->b_data & ~PAGE_MASK)
+ 
+@@ -1110,6 +1112,14 @@
+ extern void FASTCALL(mark_buffer_dirty(struct buffer_head *bh));
+ 
+ #define atomic_set_buffer_dirty(bh) test_and_set_bit(BH_Dirty, &(bh)->b_state)
++
++static inline void mark_buffer_async(struct buffer_head * bh, int on)
++{
++	if (on)
++		set_bit(BH_Async, &bh->b_state);
++	else
++		clear_bit(BH_Async, &bh->b_state);
++}
+ 
+ /*
+  * If an error happens during the make_request, this function

driver/device-mapper/patches/00_config_makefile

@@ -0,0 +1,30 @@
+--- uml_build/arch/um/config.in.orig	Tue Jan  2 14:33:42 2001
++++ uml_build/arch/um/config.in	Tue Jan  2 14:35:42 2001
+@@ -15,6 +15,8 @@
+ bool 'Prompt for development and/or incomplete code/drivers' CONFIG_EXPERIMENTAL
+ endmenu
+ 
++source drivers/md/Config.in
++
+ mainmenu_option next_comment
+ comment 'Processor features'
+ bool 'Symmetric multi-processing support' CONFIG_SMP
+--- linux/drivers/md/Config.in.orig	Tue Aug 21 14:18:30 2001
++++ linux/drivers/md/Config.in	Tue Aug 21 14:19:08 2001
+@@ -14,4 +14,6 @@
+ 
+ dep_tristate ' Logical volume manager (LVM) support' CONFIG_BLK_DEV_LVM $CONFIG_MD
+ 
++dep_tristate ' Device mapper support' CONFIG_BLK_DEV_DM $CONFIG_MD
++
+ endmenu
+--- linux/drivers/md/Makefile.orig	Tue Aug 21 14:19:14 2001
++++ linux/drivers/md/Makefile	Tue Aug 21 14:20:06 2001
+@@ -19,6 +19,7 @@
+ obj-$(CONFIG_MD_RAID5)		+= raid5.o xor.o
+ obj-$(CONFIG_BLK_DEV_MD)	+= md.o
+ obj-$(CONFIG_BLK_DEV_LVM)	+= lvm-mod.o
++obj-$(CONFIG_BLK_DEV_DM)	+= dm.o dm-table.o dm-target.o dm-fs.o
+ 
+ include $(TOPDIR)/Rules.make
+ 

driver/device-mapper/patches/INDEX

@@ -0,0 +1,5 @@
+00_config_makefile	Add device-mapper to the MD section.
+
+00_bh-async-3		AA's async bh patch so we can hook b_end_io
+                        to keep track of pending io.
+