[PATCH] iommu/arm-smmu-v3: Stop pre-zeroing batch commands in arm_smmu_atc_inv_master()
From: Zhen Lei <hidden>
Date: 2021-08-17 11:34:26
Also in:
linux-iommu, lkml
Subsystem:
arm smmu drivers, iommu subsystem, the rest · Maintainers:
Will Deacon, Joerg Roedel, Linus Torvalds
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: Zhen Lei <redacted> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 50a9db5bac466c7..e6882ae81fd08f6 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c@@ -1776,10 +1776,11 @@ 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);
--
2.26.0.106.g9fadedd
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