Messages in this thread Patch in this message | | | Date | Mon, 18 Aug 2014 15:32:34 +0300 | From | Andreea-Cristina Bernat <> | Subject | [PATCH] qib_keys: Replace rcu_assign_pointer() with RCU_INIT_POINTER() |
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The uses of "rcu_assign_pointer()" are NULLing out the pointers. According to RCU_INIT_POINTER()'s block comment: "1. This use of RCU_INIT_POINTER() is NULLing out the pointer" it is better to use it instead of rcu_assign_pointer() because it has a smaller overhead.
The following Coccinelle semantic patch was used: @@ @@
- rcu_assign_pointer + RCU_INIT_POINTER (..., NULL)
Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com> --- drivers/infiniband/hw/qib/qib_keys.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/qib/qib_keys.c b/drivers/infiniband/hw/qib/qib_keys.c index 3b9afcc..ad843c7 100644 --- a/drivers/infiniband/hw/qib/qib_keys.c +++ b/drivers/infiniband/hw/qib/qib_keys.c @@ -122,10 +122,10 @@ void qib_free_lkey(struct qib_mregion *mr) if (!mr->lkey_published) goto out; if (lkey == 0) - rcu_assign_pointer(dev->dma_mr, NULL); + RCU_INIT_POINTER(dev->dma_mr, NULL); else { r = lkey >> (32 - ib_qib_lkey_table_size); - rcu_assign_pointer(rkt->table[r], NULL); + RCU_INIT_POINTER(rkt->table[r], NULL); } qib_put_mr(mr); mr->lkey_published = 0; -- 1.9.1
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