kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

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