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	Sat Jan 25 10:33:51 2003
@@ -0,0 +1,151 @@
+#ifndef _LINUX_TLBHOOK_H
+#define _LINUX_TLBHOOK_H
+
+#include <linux/mm.h>
+
+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;
+        volatile int used;
+};
+
+extern struct tlb_hook_struct *tlb_hook_root;
+
+extern int register_tlb_hook(struct tlb_hook_struct *hook);
+extern int unregister_tlb_hook(struct tlb_hook_struct *hook);
+
+static inline void flush_tlb_hook(void)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb)
+		{
+			hook->used = 1;
+			hook->flush_tlb();
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_all_hook(void)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_all)
+		{
+			hook->used = 1;
+			hook->flush_tlb_all();
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_mm_hook(struct mm_struct *mm)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_mm)
+		{
+			hook->used = 1;
+			hook->flush_tlb_mm(mm);
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_page_hook(struct vm_area_struct *vma,
+				unsigned long addr)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_page)
+		{
+			hook->used = 1;
+			hook->flush_tlb_page(vma, addr);
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_range_hook(struct vm_area_struct *vma,
+				unsigned long start, unsigned long end)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_range)
+		{
+			hook->used = 1;
+			hook->flush_tlb_range(vma, start, end);
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_kernel_range_hook(unsigned long start,
+				unsigned long end)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_kernel_range)
+		{
+			hook->used = 1;
+			hook->flush_tlb_kernel_range(start, end);
+			hook->used = 0;
+		}
+		hook = hook->next;
+	}
+}
+
+
+static inline void flush_tlb_pgtables_hook(struct mm_struct *mm,
+				unsigned long start, unsigned long end)
+{
+	struct tlb_hook_struct *hook = tlb_hook_root;
+
+	while(hook)
+	{
+		if(hook->flush_tlb_pgtables)
+		{
+			hook->used = 1;
+			hook->flush_tlb_pgtables(mm, start, end);
+			hook->used = 0;
+		}
+		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	Sat Jan 25 03:45:01 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	Sat Jan 25 10:43:33 2003
@@ -0,0 +1,68 @@
+#include <linux/module.h>
+#include <linux/tlbhook.h>
+
+static spinlock_t tlb_hook_lock = SPIN_LOCK_UNLOCKED;
+
+struct tlb_hook_struct *tlb_hook_root = NULL;
+
+
+/* register hooks for the flush_tlb* functions */
+int register_tlb_hook(struct tlb_hook_struct *hook)
+{
+	if(!hook)
+		return -EINVAL;
+
+	hook->last = NULL;
+	hook->used = 0;
+
+	// lock the tlb_hook_struct to avoid race conditions
+	spin_lock(&tlb_hook_lock);
+
+	hook->next = tlb_hook_root;
+	if(tlb_hook_root)
+	{
+		tlb_hook_root->last = hook;
+	}
+	tlb_hook_root = hook;
+
+	spin_unlock(&tlb_hook_lock);
+
+	return 0;
+}
+
+
+/* unregister hooks for the flush_tlb* functions */
+int unregister_tlb_hook(struct tlb_hook_struct *hook)
+{
+	if(!hook)
+		return -EINVAL;
+
+	// lock the tlb_hook_struct to avoid race conditions
+	spin_lock(&tlb_hook_lock);
+
+	if(hook->last)
+	{
+		hook->last->next = hook->next;
+	} else {
+		tlb_hook_root = hook->next;
+	}
+
+	if(hook->next)
+	{
+		hook->next->last = hook->last;
+	}
+
+	spin_unlock(&tlb_hook_lock);
+
+	// wait until hook is unused
+	while(hook->used)
+	{
+		cpu_relax();
+	}
+
+	return 0;
+}
+
+
+EXPORT_SYMBOL(register_tlb_hook);
+EXPORT_SYMBOL(unregister_tlb_hook);