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    Subject[PATCH tip/core/rcu 25/28] vmalloc,rcu: Convert call_rcu(rcu_free_vb) to kfree_rcu()
    Date
    From: Lai Jiangshan <laijs@cn.fujitsu.com>

    The rcu callback rcu_free_vb() just calls a kfree(),
    so we use kfree_rcu() instead of the call_rcu(rcu_free_vb).

    Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
    Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Namhyung Kim <namhyung@gmail.com>
    Cc: David Rientjes <rientjes@google.com>
    Reviewed-by: Josh Triplett <josh@joshtriplett.org>
    ---
    mm/vmalloc.c | 9 +--------
    1 files changed, 1 insertions(+), 8 deletions(-)

    diff --git a/mm/vmalloc.c b/mm/vmalloc.c
    index 73f56c8..6540116 100644
    --- a/mm/vmalloc.c
    +++ b/mm/vmalloc.c
    @@ -830,13 +830,6 @@ static struct vmap_block *new_vmap_block(gfp_t gfp_mask)
    return vb;
    }

    -static void rcu_free_vb(struct rcu_head *head)
    -{
    - struct vmap_block *vb = container_of(head, struct vmap_block, rcu_head);
    -
    - kfree(vb);
    -}
    -
    static void free_vmap_block(struct vmap_block *vb)
    {
    struct vmap_block *tmp;
    @@ -849,7 +842,7 @@ static void free_vmap_block(struct vmap_block *vb)
    BUG_ON(tmp != vb);

    free_vmap_area_noflush(vb->va);
    - call_rcu(&vb->rcu_head, rcu_free_vb);
    + kfree_rcu(vb, rcu_head);
    }

    static void purge_fragmented_blocks(int cpu)
    --
    1.7.3.2


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