GIT: unionfs2-2.6.27.y: vfs: Remove the range_cont writeback mode.

[Erez Zadok]

commit c18cb57f81d42eb408fa7f0fb15b9f4f3f9998fb
Author: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
Date:   Mon Mar 15 20:26:02 2010 -0400

    vfs: Remove the range_cont writeback mode.
    
    commit 74baaaaec8b4f22e1ae279f5ecca4ff705b28912 upstream.
    
    Ext4 was the only user of range_cont writeback mode and ext4 switched
    to a different method. So remove the range_cont mode which is not used
    in the kernel.
    
    Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
    Signed-off-by: "Theodore Ts'o" <tytso at mit.edu>
    CC: linux-fsdevel at vger.kernel.org
    Signed-off-by: Jayson R. King <dev at jaysonking.com>
    Signed-off-by: Theodore Ts'o <tytso at mit.edu>
    Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index c2835bb..cc0e6d9 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -62,7 +62,6 @@ struct writeback_control {
 	unsigned for_writepages:1;	/* This is a writepages() call */
 	unsigned range_cyclic:1;	/* range_start is cyclic */
 	unsigned more_io:1;		/* more io to be dispatched */
-	unsigned range_cont:1;
 };
 
 /*
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 5f7cdc2..e5c4ca2 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1027,8 +1027,6 @@ continue_unlock:
 	if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
 		mapping->writeback_index = done_index;
 
-	if (wbc->range_cont)
-		wbc->range_start = index << PAGE_CACHE_SHIFT;
 	return ret;
 }
 EXPORT_SYMBOL(write_cache_pages);