--- zzzz-none-000/linux-4.4.60/arch/mips/include/asm/mach-generic/kmalloc.h	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/arch/mips/include/asm/mach-generic/kmalloc.h	2018-11-08 13:36:17.000000000 +0000
@@ -3,11 +3,7 @@
 
 
 #ifndef CONFIG_DMA_COHERENT
-/*
- * Total overkill for most systems but need as a safe default.
- * Set this one if any device in the system might do non-coherent DMA.
- */
-#define ARCH_DMA_MINALIGN	128
+#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
 #endif
 
 #endif /* __ASM_MACH_GENERIC_KMALLOC_H */