12 #include <asm/isc.h>
20  * @isc: I/O interruption subclass to register
22  * The number of users for @isc is increased. If this is the first user to
23  * register @isc, the corresponding I/O interruption subclass mask is enabled.
28 void isc_register(unsigned int isc)  in isc_register()  argument
30 	if (isc > MAX_ISC) {  in isc_register()
36 	if (isc_refs[isc] == 0)  in isc_register()
37 		system_ctl_set_bit(6, 31 - isc);  in isc_register()
38 	isc_refs[isc]++;  in isc_register()
45  * @isc: I/O interruption subclass to unregister
47  * The number of users for @isc is decreased. If this is the last user to
48  * unregister @isc, the corresponding I/O interruption subclass mask is
51  * before by the driver for @isc.
56 void isc_unregister(unsigned int isc)  in isc_unregister()  argument
60 	if (isc > MAX_ISC || isc_refs[isc] == 0) {  in isc_unregister()
64 	if (isc_refs[isc] == 1)  in isc_unregister()
65 		system_ctl_clear_bit(6, 31 - isc);  in isc_unregister()
66 	isc_refs[isc]--;  in isc_unregister()