Index: linux-2.6/fs/reiser4/plugin/item/extent_file_ops.c
===================================================================
--- linux-2.6.orig/fs/reiser4/plugin/item/extent_file_ops.c
+++ linux-2.6/fs/reiser4/plugin/item/extent_file_ops.c
@@ -7,7 +7,6 @@
#include <linux/quotaops.h>
#include <linux/swap.h>
-#include "../../../../mm/filemap.h"
static inline reiser4_extent *ext_by_offset(const znode *node, int offset)
{
@@ -937,6 +936,31 @@ static int write_extent_reserve_space(st
return reiser4_grab_space(count, 0 /* flags */);
}
+/*
+ * filemap_copy_from_user no longer exists in generic code, because it
+ * is deadlocky (copying from user while holding the page lock is bad).
+ * As a temporary fix for reiser4, just define it here.
+ */
+static inline size_t
+filemap_copy_from_user(struct page *page, unsigned long offset,
+ const char __user *buf, unsigned bytes)
+{
+ char *kaddr;
+ int left;
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ left = __copy_from_user_inatomic_nocache(kaddr + offset, buf, bytes);
+ kunmap_atomic(kaddr, KM_USER0);
+
+ if (left != 0) {
+ /* Do it the slow way */
+ kaddr = kmap(page);
+ left = __copy_from_user_nocache(kaddr + offset, buf, bytes);
+ kunmap(page);
+ }
+ return bytes - left;
+}
+
/**
* reiser4_write_extent - write method of extent item plugin
* @file: file to write to
-
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