--- zzzz-none-000/linux-3.10.107/include/linux/spi/spi_bitbang.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/spi/spi_bitbang.h	2021-02-04 17:41:59.000000000 +0000
@@ -4,11 +4,7 @@
 #include <linux/workqueue.h>
 
 struct spi_bitbang {
-	struct workqueue_struct	*workqueue;
-	struct work_struct	work;
-
-	spinlock_t		lock;
-	struct list_head	queue;
+	struct mutex		lock;
 	u8			busy;
 	u8			use_dma;
 	u8			flags;		/* extra spi->mode support */
@@ -41,12 +37,12 @@
  */
 extern int spi_bitbang_setup(struct spi_device *spi);
 extern void spi_bitbang_cleanup(struct spi_device *spi);
-extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m);
 extern int spi_bitbang_setup_transfer(struct spi_device *spi,
 				      struct spi_transfer *t);
+extern int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t);
 
 /* start or stop queue processing */
 extern int spi_bitbang_start(struct spi_bitbang *spi);
-extern int spi_bitbang_stop(struct spi_bitbang *spi);
+extern void spi_bitbang_stop(struct spi_bitbang *spi);
 
 #endif	/* __SPI_BITBANG_H */