mm: hide laptop_mode_wb_timer entirely behind the BDI API

[sfrench/cifs-2.6.git] / mm / backing-dev.c

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index f5561ea7d90ad62c28eb50e07f61e8c78df2d9d8..cd06dca232c335ce7a00e80df9a62478d90a1153 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -807,6 +807,7 @@ struct backing_dev_info *bdi_alloc(int node_id)
        bdi->capabilities = BDI_CAP_WRITEBACK | BDI_CAP_WRITEBACK_ACCT;
        bdi->ra_pages = VM_READAHEAD_PAGES;
        bdi->io_pages = VM_READAHEAD_PAGES;
+       timer_setup(&bdi->laptop_mode_wb_timer, laptop_mode_timer_fn, 0);
        return bdi;
 }
 EXPORT_SYMBOL(bdi_alloc);
@@ -928,6 +929,8 @@ static void bdi_remove_from_list(struct backing_dev_info *bdi)
 
 void bdi_unregister(struct backing_dev_info *bdi)
 {
+       del_timer_sync(&bdi->laptop_mode_wb_timer);
+
        /* make sure nobody finds us on the bdi_list anymore */
        bdi_remove_from_list(bdi);
        wb_shutdown(&bdi->wb);