From 590c3fec2dbfc07f1dbdb992f9f213a9f71d7719 Mon Sep 17 00:00:00 2001 From: Andreea-Cristina Bernat Date: Fri, 16 Jan 2015 10:19:59 -0500 Subject: [PATCH] IB/qib: Replace rcu_assign_pointer() with RCU_INIT_POINTER() in qib_keys.c 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) [Derived from http://marc.info/?l=linux-rdma&m=140836519219236&w=2] Tested-by: Mike Marciniszyn Signed-off-by: Andreea-Cristina Bernat Signed-off-by: Mike Marciniszyn Signed-off-by: Roland Dreier --- 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 3b9afccaaade..ad843c786e72 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; -- 2.39.5