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[S390] pfault: delay register of pfault interrupt

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Use an early init call to initialize pfault. That way it is possible to
use the register_external_interrupt() instead of the early variant.
No need to enable pfault any earlier since it has only effect if user
space processes are running.

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 2011-01-05 12:47:39 +01:00 committed by Martin Schwidefsky
parent 62d146ffe3
commit fb0a9d7e86
3 changed files with 15 additions and 15 deletions
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2
arch/s390/include/asm/system.h
View file

@ -101,11 +101,9 @@ extern void account_vtime(struct task_struct *, struct task_struct *);
extern void account_tick_vtime(struct task_struct *);
#ifdef CONFIG_PFAULT
extern void pfault_irq_init(void);
extern int pfault_init(void);
extern void pfault_fini(void);
#else /* CONFIG_PFAULT */
#define pfault_irq_init() do { } while (0)
#define pfault_init() ({-1;})
#define pfault_fini() do { } while (0)
#endif /* CONFIG_PFAULT */

1
arch/s390/kernel/traps.c
View file

@ -733,5 +733,4 @@ void __init trap_init(void)
pgm_check_table[0x15] = &operand_exception;
pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception;
pfault_irq_init();
}

27
arch/s390/mm/fault.c
View file

@ -481,8 +481,7 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
/*
* 'pfault' pseudo page faults routines.
*/
static ext_int_info_t ext_int_pfault;
static int pfault_disable = 0;
static int pfault_disable;
static int __init nopfault(char *str)
{
@ -594,24 +593,28 @@ static void pfault_interrupt(unsigned int ext_int_code,
}
}
void __init pfault_irq_init(void)
static int __init pfault_irq_init(void)
{
if (!MACHINE_IS_VM)
return;
int rc;
if (!MACHINE_IS_VM)
return 0;
/*
* Try to get pfault pseudo page faults going.
*/
if (register_early_external_interrupt(0x2603, pfault_interrupt,
&ext_int_pfault) != 0)
panic("Couldn't request external interrupt 0x2603");
rc = register_external_interrupt(0x2603, pfault_interrupt);
if (rc) {
pfault_disable = 1;
return rc;
}
if (pfault_init() == 0)
return;
return 0;
/* Tough luck, no pfault. */
pfault_disable = 1;
unregister_early_external_interrupt(0x2603, pfault_interrupt,
&ext_int_pfault);
unregister_external_interrupt(0x2603, pfault_interrupt);
return 0;
}
early_initcall(pfault_irq_init);
#endif