spi: Order fields in spi_device for better packing
Now that spi_device->mode is a u16, the chip_select, bits_per_mode,
and mode fields pack poorly, taking 8 bytes: four data and four
padding. By moving (u8)bits_per_word up one position, to after
(u8)chip_select, they pack better and only use 4 bytes.
Signed-off-by: Trent Piepho <[email protected]>
Reviewed-by: Sourav Poddar <[email protected]>
Tested-by: Sourav Poddar <[email protected]>g
Signed-off-by: Mark Brown <[email protected]>
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 8c62ba7..27a8829 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -75,6 +75,7 @@
struct spi_master *master;
u32 max_speed_hz;
u8 chip_select;
+ u8 bits_per_word;
u16 mode;
#define SPI_CPHA 0x01 /* clock phase */
#define SPI_CPOL 0x02 /* clock polarity */
@@ -92,7 +93,6 @@
#define SPI_TX_QUAD 0x200 /* transmit with 4 wires */
#define SPI_RX_DUAL 0x400 /* receive with 2 wires */
#define SPI_RX_QUAD 0x800 /* receive with 4 wires */
- u8 bits_per_word;
int irq;
void *controller_state;
void *controller_data;
