[PATCH] PCI: make it easier to see that set_msi_affinity() is used

I missed this usage in drivers/pci/msi.h:

#ifdef CONFIG_SMP
#define set_msi_irq_affinity set_msi_affinity
#else
#define set_msi_irq_affinity NULL
#endif

set_msi_affinity() is declared and exclusively used in msi.c.
Here's a better way so (hopefully) history doesn't repeat itself.

Signed-off-by: Grant Grundler <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/pci/msi.c

···
 		break;
 	}
 }
+#else
+#define set_msi_affinity NULL
 #endif /* CONFIG_SMP */
 
 static void mask_MSI_irq(unsigned int vector)
···
 	.disable	= mask_MSI_irq,
 	.ack		= mask_MSI_irq,
 	.end		= end_msi_irq_w_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 /*
···
 	.disable	= mask_MSI_irq,
 	.ack		= mask_MSI_irq,
 	.end		= end_msi_irq_w_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 /*
···
 	.disable	= do_nothing,
 	.ack		= do_nothing,
 	.end		= end_msi_irq_wo_maskbit,
-	.set_affinity	= set_msi_irq_affinity
+	.set_affinity	= set_msi_affinity
 };
 
 static void msi_data_init(struct msg_data *msi_data,

drivers/pci/msi.h

···
 extern void (*interrupt[NR_IRQS])(void);
 extern int pci_vector_resources(int last, int nr_released);
 
-#ifdef CONFIG_SMP
-#define set_msi_irq_affinity	set_msi_affinity
-#else
-#define set_msi_irq_affinity	NULL
-#endif
-
 /*
  * MSI-X Address Register
  */