From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file

---
 kernel/drivers/rknpu/rknpu_iommu.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/drivers/rknpu/rknpu_iommu.c b/kernel/drivers/rknpu/rknpu_iommu.c
index 39cc8f8..01620d9 100644
--- a/kernel/drivers/rknpu/rknpu_iommu.c
+++ b/kernel/drivers/rknpu/rknpu_iommu.c
@@ -18,6 +18,8 @@
 
 	shift = iova_shift(iovad);
 	iova_len = size >> shift;
+
+#if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE
 	/*
 	 * Freeing non-power-of-two-sized allocations back into the IOVA caches
 	 * will come back to bite us badly, so we have to waste a bit of space
@@ -26,6 +28,7 @@
 	 */
 	if (iova_len < (1 << (IOVA_RANGE_CACHE_MAX_SIZE - 1)))
 		iova_len = roundup_pow_of_two(iova_len);
+#endif
 
 #if (KERNEL_VERSION(5, 10, 0) <= LINUX_VERSION_CODE)
 	dma_limit = min_not_zero(dma_limit, dev->bus_dma_limit);

--
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