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s390/smp: use call_on_stack() macro 

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-07-05 20:38:36 +02:00 committed by Vasily Gorbik
parent 845370f47f
commit 0f541cc201
1 changed files with 8 additions and 4 deletions
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12
arch/s390/kernel/smp.c
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@ -300,24 +300,28 @@ static void pcpu_start_fn(struct pcpu *pcpu, void (*func)(void *), void *data)
pcpu_sigp_retry(pcpu, SIGP_RESTART, 0);
}
typedef void (pcpu_delegate_fn)(void *);
/*
* Call function via PSW restart on pcpu and stop the current cpu.
*/
static void __pcpu_delegate(void (*func)(void*), void *data)
static void __pcpu_delegate(pcpu_delegate_fn *func, void *data)
{
func(data); /* should not return */
}
static void __no_sanitize_address pcpu_delegate(struct pcpu *pcpu,
void (*func)(void *),
pcpu_delegate_fn *func,
void *data, unsigned long stack)
{
struct lowcore *lc = lowcore_ptr[pcpu - pcpu_devices];
unsigned long source_cpu = stap();
__load_psw_mask(PSW_KERNEL_BITS | PSW_MASK_DAT);
if (pcpu->address == source_cpu)
CALL_ON_STACK(__pcpu_delegate, stack, 2, func, data);
if (pcpu->address == source_cpu) {
call_on_stack(2, stack, void, __pcpu_delegate,
pcpu_delegate_fn *, func, void *, data);
}
/* Stop target cpu (if func returns this stops the current cpu). */
pcpu_sigp_retry(pcpu, SIGP_STOP, 0);
/* Restart func on the target cpu and stop the current cpu. */