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    Subject[PATCH tip/core/rcu 24/28] vmalloc,rcu: Convert call_rcu(rcu_free_va) to kfree_rcu()
    Date
    From: Lai Jiangshan <laijs@cn.fujitsu.com>

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

    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
    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 5d60302..73f56c8 100644
    --- a/mm/vmalloc.c
    +++ b/mm/vmalloc.c
    @@ -452,13 +452,6 @@ overflow:
    return ERR_PTR(-EBUSY);
    }

    -static void rcu_free_va(struct rcu_head *head)
    -{
    - struct vmap_area *va = container_of(head, struct vmap_area, rcu_head);
    -
    - kfree(va);
    -}
    -
    static void __free_vmap_area(struct vmap_area *va)
    {
    BUG_ON(RB_EMPTY_NODE(&va->rb_node));
    @@ -491,7 +484,7 @@ static void __free_vmap_area(struct vmap_area *va)
    if (va->va_end > VMALLOC_START && va->va_end <= VMALLOC_END)
    vmap_area_pcpu_hole = max(vmap_area_pcpu_hole, va->va_end);

    - call_rcu(&va->rcu_head, rcu_free_va);
    + kfree_rcu(va, rcu_head);
    }

    /*
    --
    1.7.3.2


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