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From:   YueHaibing <yuehaibing@huawei.com>
To:     <benh@kernel.crashing.org>, <paulus@samba.org>,
        <mpe@ellerman.id.au>, <aik@ozlabs.ru>,
        <david@gibson.dropbear.id.au>
CC:     <linux-kernel@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>,
        YueHaibing <yuehaibing@huawei.com>
Subject: [PATCH -next] powerpc/powernv/ioda: using kfree_rcu() to simplify the code
Date:   Thu, 11 Jul 2019 22:18:18 +0800
Message-ID: <20190711141818.18044-1-yuehaibing@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The callback function of call_rcu() just calls a kfree(), so we
can use kfree_rcu() instead of call_rcu() + callback function.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 arch/powerpc/platforms/powernv/pci-ioda-tce.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda-tce.c b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
index e28f03e..05f80b1 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda-tce.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
@@ -332,14 +332,6 @@ long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
 	return -ENOMEM;
 }
 
-static void pnv_iommu_table_group_link_free(struct rcu_head *head)
-{
-	struct iommu_table_group_link *tgl = container_of(head,
-			struct iommu_table_group_link, rcu);
-
-	kfree(tgl);
-}
-
 void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
 		struct iommu_table_group *table_group)
 {
@@ -355,7 +347,7 @@ void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
 	list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) {
 		if (tgl->table_group == table_group) {
 			list_del_rcu(&tgl->next);
-			call_rcu(&tgl->rcu, pnv_iommu_table_group_link_free);
+			kfree_rcu(tgl, rcu);
 			found = true;
 			break;
 		}
-- 
2.7.4