irq: change ->set_affinity() to return status, fix

This build failure:

arch/powerpc/sysdev/mpic.c:810: error: conflicting types for 'mpic_set_affinity'
arch/powerpc/sysdev/mpic.h:39: error: previous declaration of 'mpic_set_affinity' was here
make[2]: *** [arch/powerpc/sysdev/mpic.o] Error 1
make[2]: *** Waiting for unfinished jobs....

Triggers because the function prototype was not updated when the
function call signature got changed by:

d5dedd4: irq: change ->set_affinity() to return status

[ Impact: build fix on powerpc ]

Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Yinghai Lu <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Rusty Russell <[e-mail]>
Cc: [e-mail]
LKML-Reference: <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>

arch/powerpc/sysdev/mpic.h

···
 
 extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
 extern void mpic_set_vector(unsigned int virq, unsigned int vector);
-extern void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask);
+extern int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask);
 
 #endif /* _POWERPC_SYSDEV_MPIC_H */