[PATCH] add a 'NO_IRQ' definition to IDE

(second hunk just makes 2.4/2.5 header match format)

include/linux/ide.h

@@ -70,6 +70,13 @@ void cmd640_dump_regs (void);
 #define DISABLE_IRQ_NOSYNC	0
 #endif
 
+/*
+ * Used to indicate "no IRQ", should be a value that cannot be an IRQ
+ * number.
+ */
+ 
+#define IDE_NO_IRQ		(-1)
+
 /*
  * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
  */
@@ -106,6 +113,7 @@ typedef unsigned char	byte;	/* used everywhere */
 /*
  * state flags
  */
+
 #define DMA_PIO_RETRY	1	/* retrying in PIO */
 
 /*