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mcexec_prepare_image(): use memory barrier when updating request status

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Balazs Gerofi
2016-12-25 17:19:14 +09:00
parent 3e1f154412
commit b836b84825
1 changed files with 2 additions and 0 deletions
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2
executer/kernel/mcctrl/control.c
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@ -179,6 +179,7 @@ static long mcexec_prepare_image(ihk_os_t os,
dprintk("%p (%lx)\n", pdesc, isp.arg); dprintk("%p (%lx)\n", pdesc, isp.arg);
pdesc->status = 0; pdesc->status = 0;
mb();
mcctrl_ikc_send(os, pdesc->cpu, &isp); mcctrl_ikc_send(os, pdesc->cpu, &isp);
while (wait_event_interruptible(ppd->wq_prepare, pdesc->status) != 0); while (wait_event_interruptible(ppd->wq_prepare, pdesc->status) != 0);
@ -1570,6 +1571,7 @@ void mcexec_prepare_ack(ihk_os_t os, unsigned long arg, int err)
desc->err = err; desc->err = err;
desc->status = 1; desc->status = 1;
mb();
wake_up_all(&ppd->wq_prepare); wake_up_all(&ppd->wq_prepare);
mcctrl_put_per_proc_data(ppd); mcctrl_put_per_proc_data(ppd);