---

yaml
---
r: 15351
b: refs/heads/master
c: 30f04a4
h: refs/heads/master
i:
  15349: 33625e6
  15347: 06099e4
  15343: a9d4135
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3d0a07e3310c947c048bd01d8d0efa0e4fae5ba9
+refs/heads/master: 30f04a4efa73dc80bf3f59f3f19ad5a24ac5ac0a

trunk/fs/hostfs/hostfs_kern.c

@@ -501,11 +501,16 @@ int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
 	long long start;
 	int err = 0;
 
-	start = (long long) (page->index << PAGE_CACHE_SHIFT) + from;
+	start = (((long long) page->index) << PAGE_CACHE_SHIFT) + from;
 	buffer = kmap(page);
 	err = write_file(FILE_HOSTFS_I(file)->fd, &start, buffer + from,
 			 to - from);
 	if(err > 0) err = 0;
+
+	/* Actually, if !err, write_file has added to-from to start, so, despite
+	 * the appearance, we are comparing i_size against the _last_ written
+	 * location, as we should. */
+
 	if(!err && (start > inode->i_size))
 		inode->i_size = start;