--- zzzz-none-000/linux-4.4.60/include/uapi/linux/spi/spidev.h	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/include/uapi/linux/spi/spidev.h	2018-11-08 13:36:17.000000000 +0000
@@ -111,7 +111,7 @@
 
 /* not all platforms use <asm-generic/ioctl.h> or _IOC_TYPECHECK() ... */
 #define SPI_MSGSIZE(N) \
-	((((N)*(sizeof (struct spi_ioc_transfer))) < (1 << _IOC_SIZEBITS)) \
+	((((N)*(sizeof (struct spi_ioc_transfer))) < (1 << 13)) \
 		? ((N)*(sizeof (struct spi_ioc_transfer))) : 0)
 #define SPI_IOC_MESSAGE(N) _IOW(SPI_IOC_MAGIC, 0, char[SPI_MSGSIZE(N)])