Commit 93f9f795 authored by Zhen Lei's avatar Zhen Lei Committed by Will Deacon
Browse files

iommu/arm-smmu-v3: Stop pre-zeroing batch commands in arm_smmu_atc_inv_master() 



Pre-zeroing the batched commands structure is inefficient, as individual
commands are zeroed later in arm_smmu_cmdq_build_cmd(). Therefore, only
the member 'num' needs to be initialized to 0.

Signed-off-by: default avatarZhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: default avatarJohn Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/20210817113411.1962-1-thunder.leizhen@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 5816b3e6

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+2 −1
Original line number Diff line number Diff line
@@ -1764,10 +1764,11 @@ static int arm_smmu_atc_inv_master(struct arm_smmu_master *master) 
{

	int i;

	struct arm_smmu_cmdq_ent cmd;

	struct arm_smmu_cmdq_batch cmds = {};

	struct arm_smmu_cmdq_batch cmds;



	arm_smmu_atc_inv_to_cmd(0, 0, 0, &cmd);



	cmds.num = 0;

	for (i = 0; i < master->num_streams; i++) {

		cmd.atc.sid = master->streams[i].id;

		arm_smmu_cmdq_batch_add(master->smmu, &cmds, &cmd);