Driver core / memory: Simplify __memory_block_change_state()

As noted by Tang Chen, the last_online field in struct memory_block
introduced by commit 4960e05 (Driver core: Introduce offline/online
callbacks for memory blocks) is not really necessary, because
online_pages() restores the previous state if passed ONLINE_KEEP as
the last argument.  Therefore, remove that field along with the code
referring to it.

References: http://marc.info/?l=linux-kernel&m=136919777305599&w=2
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/memory.h b/include/linux/memory.h
index 3d5346583022..85c31a8e2904 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -26,7 +26,6 @@ struct memory_block {
         unsigned long start_section_nr;
         unsigned long end_section_nr;
         unsigned long state;
-        int last_online;
         int section_count;
 
         /*