patch-2.1.132 linux/include/asm-arm/dma.h

• Lines: 38
• Date: Thu Dec 17 09:05:43 1998
• Orig file: v2.1.131/linux/include/asm-arm/dma.h
• Orig date: Tue Apr 14 14:29:25 1998

diff -u --recursive --new-file v2.1.131/linux/include/asm-arm/dma.h linux/include/asm-arm/dma.h
@@ -4,6 +4,7 @@
 typedef unsigned int dmach_t;
 
 #include <asm/irq.h>
+#include <asm/spinlock.h>
 #include <asm/arch/dma.h>
 
 typedef struct {
@@ -13,6 +14,20 @@
 
 extern const char dma_str[];
 
+extern spinlock_t  dma_spin_lock;
+
+extern __inline__ unsigned long claim_dma_lock(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&dma_spin_lock, flags);
+	return flags;
+}
+
+extern __inline__ void release_dma_lock(unsigned long flags)
+{
+	spin_unlock_irqrestore(&dma_spin_lock, flags);
+}
+
 /* Clear the 'DMA Pointer Flip Flop'.
  * Write 0 for LSB/MSB, 1 for MSB/LSB access.
  *
@@ -26,7 +41,7 @@
  * NOTE: This is an architecture specific function, and should
  *       be hidden from the drivers
  */
-static __inline__ void set_dma_page(dmach_t channel, char pagenr)
+extern __inline__ void set_dma_page(dmach_t channel, char pagenr)
 {
 	printk(dma_str, "set_dma_page", channel);
 }