vfs: Remove the range_cont writeback mode.

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@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
CC: linux-fsdevel@vger.kernel.org

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 12b15c5..bd91987 100644 (file)
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -63,7 +63,6 @@ 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 c130a13..e373f14 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -961,8 +961,6 @@ retry:
        if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
                mapping->writeback_index = index;
 
-       if (wbc->range_cont)
-               wbc->range_start = index << PAGE_CACHE_SHIFT;
        return ret;
 }
 EXPORT_SYMBOL(write_cache_pages);