diff -urN 2.4.9ac13/drivers/block/loop.c 2.4.9ac14/drivers/block/loop.c
--- 2.4.9ac13/drivers/block/loop.c	Fri Sep 21 22:09:16 2001
+++ 2.4.9ac14/drivers/block/loop.c	Sat Sep 22 06:09:39 2001
@@ -177,6 +177,8 @@
 	unsigned size, offset;
 	int len;
 
+	down(&(file->f_dentry->d_inode->i_sem));
+
 	index = pos >> PAGE_CACHE_SHIFT;
 	offset = pos & (PAGE_CACHE_SIZE - 1);
 	len = bh->b_size;
@@ -210,6 +212,7 @@
 		deactivate_page(page);
 		page_cache_release(page);
 	}
+	up(&(file->f_dentry->d_inode->i_sem));
 	return 0;
 
 write_fail:
@@ -221,6 +224,7 @@
 	deactivate_page(page);
 	page_cache_release(page);
 fail:
+	up(&(file->f_dentry->d_inode->i_sem));
 	return -1;
 }