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[S390] pfault: always enable service signal interrupt

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Always enable the service signal subclass mask bit in cr0, if pfault
is available. That way we use the normal cpu hotplug way to propagate
the subclass mask bit in cr0 instead of open coding it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2011-05-26 09:48:22 +02:00
parent 4db70f73e5
commit 902050bcde
1 changed files with 1 additions and 2 deletions
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3
arch/s390/mm/fault.c
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@ -485,7 +485,6 @@ int pfault_init(void)
"2:\n"
EX_TABLE(0b,1b)
: "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc");
__ctl_set_bit(0, 9);
return rc;
}
@ -500,7 +499,6 @@ void pfault_fini(void)
if (!MACHINE_IS_VM || pfault_disable)
return;
__ctl_clear_bit(0,9);
asm volatile(
" diag %0,0,0x258\n"
"0:\n"
@ -615,6 +613,7 @@ static int __init pfault_irq_init(void)
rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP;
if (rc)
goto out_pfault;
ctl_set_bit(0, 9);
hotcpu_notifier(pfault_cpu_notify, 0);
return 0;