--- rpm/build/kernel-2.4.9/linux/include/linux/fs.h	Mon Nov  5 22:20:00 2001
+++ linux/include/linux/fs.h	Mon Nov  5 22:24:09 2001
@@ -1049,6 +1049,7 @@
 extern int register_filesystem(struct file_system_type *);
 extern int unregister_filesystem(struct file_system_type *);
 extern struct vfsmount *kern_mount(struct file_system_type *);
+struct vfsmount *do_kern_mount(char *type, int flags, char *name, void *data);
 extern int may_umount(struct vfsmount *);
 extern long do_mount(char *, char *, char *, unsigned long, void *);
 
@@ -1474,6 +1475,7 @@
 extern ssize_t generic_file_read(struct file *, char *, size_t, loff_t *);
 extern ssize_t generic_file_write(struct file *, const char *, size_t, loff_t *);
 extern void do_generic_file_read(struct file *, loff_t *, read_descriptor_t *, read_actor_t, int);
+ssize_t do_generic_file_write(struct file *file,const char *buf,size_t count,loff_t *ppos, int (*actor)(char *, char *, size_t ));
 
 extern ssize_t generic_read_dir(struct file *, char *, size_t, loff_t *);
 extern loff_t generic_file_llseek(struct file *, loff_t, int);
--- rpm/build/kernel-2.4.9/linux/kernel/ksyms.c	Mon Nov  5 22:20:00 2001
+++ linux/kernel/ksyms.c	Mon Nov  5 22:29:41 2001
@@ -246,6 +246,7 @@
 EXPORT_SYMBOL(do_generic_file_read);
 EXPORT_SYMBOL(flush_inode_pages);
 EXPORT_SYMBOL(generic_file_write);
+EXPORT_SYMBOL(do_generic_file_write);
 EXPORT_SYMBOL(generic_file_mmap);
 EXPORT_SYMBOL(generic_ro_fops);
 EXPORT_SYMBOL(generic_buffer_fdatasync);
@@ -286,6 +287,7 @@
 EXPORT_SYMBOL(__pollwait);
 EXPORT_SYMBOL(poll_freewait);
 EXPORT_SYMBOL(ROOT_DEV);
+//EXPORT_SYMBOL(pagecache_lock);
 EXPORT_SYMBOL(__find_get_page);
 EXPORT_SYMBOL(__find_lock_page);
 EXPORT_SYMBOL(find_get_page_simple);
@@ -371,6 +373,7 @@
 EXPORT_SYMBOL(register_filesystem);
 EXPORT_SYMBOL(unregister_filesystem);
 EXPORT_SYMBOL(kern_mount);
+EXPORT_SYMBOL(do_kern_mount);
 EXPORT_SYMBOL(__mntput);
 EXPORT_SYMBOL(may_umount);
 
--- rpm/build/kernel-2.4.9/linux/mm/filemap.c	Mon Nov  5 22:20:00 2001
+++ linux/mm/filemap.c	Mon Nov  5 22:16:57 2001
@@ -2672,7 +2672,7 @@
  *							okir@monad.swb.de
  */
 ssize_t
-generic_file_write(struct file *file,const char *buf,size_t count,loff_t *ppos)
+do_generic_file_write(struct file *file,const char *buf,size_t count,loff_t *ppos, int (*actor)(char *, char *, size_t ))
 {
 	struct inode	*inode = file->f_dentry->d_inode; 
 	struct address_space *mapping = inode->i_mapping;
@@ -2686,8 +2686,10 @@
 
 	cached_page = NULL;
 
+#if 0
 	if (!access_ok(VERIFY_READ, buf, count))
 		return -EFAULT;
+#endif
 		
 	down(&inode->i_sem);
 
@@ -2794,10 +2796,12 @@
 		 * same page as we're writing to, without it being marked
 		 * up-to-date.
 		 */
+#if 0
 		{ volatile unsigned char dummy;
 			__get_user(dummy, buf);
 			__get_user(dummy, buf+bytes-1);
 		}
+#endif
 
 		status = -ENOMEM;	/* we'll assign it later anyway */
 		page = __grab_cache_page(mapping, index, &cached_page);
@@ -2813,7 +2817,7 @@
 		if (status)
 			goto sync_failure;
 		kaddr = page_address(page);
-		page_fault = __copy_from_user(kaddr+offset, buf, bytes);
+		page_fault = actor(kaddr+offset, buf, bytes);
 		flush_dcache_page(page);
 		status = mapping->a_ops->commit_write(file, page, offset, offset+bytes);
 		if (page_fault)
@@ -2870,6 +2874,21 @@
 		vmtruncate(inode, inode->i_size);
 	goto done;
 }
+
+static inline int actor_from_user(char *dst, char *src, size_t len)
+{
+	if (!access_ok(VERIFY_READ, src, len))
+		return -EFAULT;
+		
+	return __copy_from_user(dst, src, len);
+}
+
+ssize_t
+generic_file_write(struct file *file,const char *buf,size_t count,loff_t *ppos)
+{
+	return do_generic_file_write(file, buf, count, ppos, &actor_from_user);
+}
+
 
 void __init page_cache_init(unsigned long mempages)
 {