WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index a23862e..08c1c57 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -265,9 +265,10 @@
  * Drivers can provide word-at-a-time i/o primitives, or provide
  * transfer-at-a-time ones to leverage dma or fifo hardware.
  */
-static void bitbang_work(void *_bitbang)
+static void bitbang_work(struct work_struct *work)
 {
-	struct spi_bitbang	*bitbang = _bitbang;
+	struct spi_bitbang	*bitbang =
+		container_of(work, struct spi_bitbang, work);
 	unsigned long		flags;
 
 	spin_lock_irqsave(&bitbang->lock, flags);
@@ -456,7 +457,7 @@
 	if (!bitbang->master || !bitbang->chipselect)
 		return -EINVAL;
 
-	INIT_WORK(&bitbang->work, bitbang_work, bitbang);
+	INIT_WORK(&bitbang->work, bitbang_work);
 	spin_lock_init(&bitbang->lock);
 	INIT_LIST_HEAD(&bitbang->queue);