mm/vmalloc.c: remove alloc_map from vmap_block

As we have removed the dead code in the vb_alloc, it seems there is no
place to use the alloc_map.  So there is no reason to maintain the
alloc_map in vmap_block.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 99d045a0a0eb..7ac2a1f8358a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -754,7 +754,6 @@ struct vmap_block {
         struct vmap_area *va;
         struct vmap_block_queue *vbq;
         unsigned long free, dirty;
-        DECLARE_BITMAP(alloc_map, VMAP_BBMAP_BITS);
         DECLARE_BITMAP(dirty_map, VMAP_BBMAP_BITS);
         struct list_head free_list;
         struct rcu_head rcu_head;
@@ -820,7 +819,6 @@ static struct vmap_block *new_vmap_block(gfp_t gfp_mask)
         vb->va = va;
         vb->free = VMAP_BBMAP_BITS;
         vb->dirty = 0;
-        bitmap_zero(vb->alloc_map, VMAP_BBMAP_BITS);
         bitmap_zero(vb->dirty_map, VMAP_BBMAP_BITS);
         INIT_LIST_HEAD(&vb->free_list);
 
@@ -873,7 +871,6 @@ static void purge_fragmented_blocks(int cpu)
                 if (vb->free + vb->dirty == VMAP_BBMAP_BITS && vb->dirty != VMAP_BBMAP_BITS) {
                         vb->free = 0; /* prevent further allocs after releasing lock */
                         vb->dirty = VMAP_BBMAP_BITS; /* prevent purging it again */
-                        bitmap_fill(vb->alloc_map, VMAP_BBMAP_BITS);
                         bitmap_fill(vb->dirty_map, VMAP_BBMAP_BITS);
                         spin_lock(&vbq->lock);
                         list_del_rcu(&vb->free_list);