[PATCH] sysfs: fill_read_buffer() fix

This BUG_ON() triggers for `count = -EFOO' due to PAGE_SIZE being unsigned.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/sysfs/file.c

@@ -89,7 +89,7 @@ static int fill_read_buffer(struct file * file, struct sysfs_buffer * buffer)
 		return -ENOMEM;
 
 	count = ops->show(kobj,attr,buffer->page);
-	BUG_ON(count > PAGE_SIZE);
+	BUG_ON(count > (ssize_t)PAGE_SIZE);
 	if (count >= 0)
 		buffer->count = count;
 	else