diff -urP linux-2.5.59/include/linux/tlbhook.h linux-2.5.59_patched/include/linux/tlbhook.h
--- linux-2.5.59/include/linux/tlbhook.h	Thu Jan  1 01:00:00 1970
+++ linux-2.5.59_patched/include/linux/tlbhook.h	Wed Jan 22 22:29:30 2003
@@ -0,0 +1,122 @@
+#ifndef _LINUX_TLBHOOK_H
+#define _LINUX_TLBHOOK_H
+
+#include <linux/mm.h>
+
+typedef struct tlb_hook_struct {
+	void (*flush_tlb)( void );
+	void (*flush_tlb_all)( void );
+	void (*flush_tlb_mm)( struct mm_struct *mm );
+	void (*flush_tlb_page)( struct vm_area_struct *vma,
+				unsigned long addr );
+	void (*flush_tlb_range)( struct vm_area_struct *vma,
+				unsigned long start, unsigned long end );
+	void (*flush_tlb_kernel_range)( unsigned long start,
+				unsigned long end );
+	void (*flush_tlb_pgtables)( struct mm_struct *mm,
+				unsigned long start, unsigned long end );
+
+	struct tlb_hook_struct *next;
+	struct tlb_hook_struct *last;
+} tlb_hook_t;
+
+extern tlb_hook_t *tlb_hook_root;
+
+extern int register_tlb_hook( tlb_hook_t *hook );
+extern int unregister_tlb_hook( tlb_hook_t *hook );
+
+static inline void flush_tlb_hook( void )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb )
+			hook->flush_tlb( );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_all_hook( void )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb_all )
+			hook->flush_tlb_all( );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_mm_hook( struct mm_struct *mm )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb_mm )
+			hook->flush_tlb_mm( mm );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_page_hook( struct vm_area_struct *vma,
+				unsigned long addr )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb_page )
+			hook->flush_tlb_page( vma, addr );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_range_hook( struct vm_area_struct *vma,
+				unsigned long start, unsigned long end )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb_range )
+			hook->flush_tlb_range( vma, start, end );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_kernel_range_hook( unsigned long start,
+				unsigned long end )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook)
+	{
+		if( hook->flush_tlb_kernel_range )
+			hook->flush_tlb_kernel_range( start, end );
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_pgtables_hook( struct mm_struct *mm,
+				unsigned long start, unsigned long end )
+{
+	tlb_hook_t *hook = tlb_hook_root;
+
+	while( hook )
+	{
+		if( hook->flush_tlb_pgtables )
+			hook->flush_tlb_pgtables( mm, start, end );
+		hook = hook->next;
+	}
+}
+
+#endif /* _LINUX_TLBHOOK_H */
diff -urP linux-2.5.59/mm/Makefile linux-2.5.59_patched/mm/Makefile
--- linux-2.5.59/mm/Makefile	Fri Jan 17 03:22:20 2003
+++ linux-2.5.59_patched/mm/Makefile	Wed Jan 22 22:34:06 2003
@@ -2,7 +2,8 @@
 # Makefile for the linux memory manager.
 #
 
-export-objs := shmem.o filemap.o mempool.o page_alloc.o page-writeback.o
+export-objs 		:= shmem.o filemap.o mempool.o page_alloc.o page-writeback.o \
+			   tlbhook.o
 
 mmu-y			:= nommu.o
 mmu-$(CONFIG_MMU)	:= fremap.o highmem.o madvise.o memory.o mincore.o \
@@ -11,6 +12,6 @@
 
 obj-y			:= bootmem.o filemap.o mempool.o oom_kill.o \
 			   page_alloc.o page-writeback.o pdflush.o readahead.o \
-			   slab.o swap.o truncate.o vcache.o vmscan.o $(mmu-y)
+			   slab.o swap.o tlbhook.o truncate.o vcache.o vmscan.o $(mmu-y)
 
 obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o
diff -urP linux-2.5.59/mm/tlbhook.c linux-2.5.59_patched/mm/tlbhook.c
--- linux-2.5.59/mm/tlbhook.c	Thu Jan  1 01:00:00 1970
+++ linux-2.5.59_patched/mm/tlbhook.c	Wed Jan 22 22:38:42 2003
@@ -0,0 +1,70 @@
+#include <linux/module.h>
+#include <linux/tlbhook.h>
+
+static spinlock_t tlb_hook_lock = SPIN_LOCK_UNLOCKED;
+
+tlb_hook_t *tlb_hook_root = NULL;
+
+
+/* register hooks for the flush_tlb* functions */
+int register_tlb_hook( tlb_hook_t *hook )
+{
+	tlb_hook_t *last;
+
+	if( !hook )
+		return -EINVAL;
+
+	hook->next = NULL;
+
+	// lock the tlb_hook_struct to avoid race conditions
+	spin_lock( &tlb_hook_lock );
+
+	if( tlb_hook_root )
+	{
+		last = tlb_hook_root->last;
+		tlb_hook_root->last = hook;
+
+		hook->last = last;
+		last->next = hook;
+	} else {
+		hook->last = hook;
+		tlb_hook_root = hook;
+	}
+
+	spin_unlock( &tlb_hook_lock );
+
+	return 0;
+}
+
+
+/* unregister hooks for the flush_tlb* functions */
+int unregister_tlb_hook( tlb_hook_t *hook )
+{
+	if( !hook )
+		return -EINVAL;
+
+	// lock the tlb_hook_struct to avoid race conditions
+	spin_lock( &tlb_hook_lock );
+
+	if( hook == tlb_hook_root )
+	{
+		tlb_hook_root = hook->next;
+	} else {
+		hook->last->next = hook->next;
+	}
+
+	if( hook->next )
+	{
+		hook->next->last = hook->last;
+	} else if( tlb_hook_root ) {
+		tlb_hook_root->last = hook->last;
+	}
+
+	spin_unlock( &tlb_hook_lock );
+
+	return 0;
+}
+
+
+EXPORT_SYMBOL( register_tlb_hook );
+EXPORT_SYMBOL( unregister_tlb_hook );