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migration: pre_save return int

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Modify the pre_save method on VMStateDescription to return an int
rather than void so that it potentially can fail.

Changed zillions of devices to make them return 0; the only
case I've made it return non-0 is hw/intc/s390_flic_kvm.c that already
had an error_report/return case.

Note: If you add an error exit in your pre_save you must emit
an error_report to say why.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20170925112917.21340-2-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2017-09-25 12:29:12 +01:00
parent 9ac78b6171
commit 44b1ff319c
59 changed files with 199 additions and 70 deletions
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4
hw/ppc/ppc.c
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@ -937,11 +937,13 @@ void cpu_ppc_clock_vm_state_change(void *opaque, int running,
* final pages of memory (which happens between vm_stop()
* and pre_save()) takes max_downtime.
*/
static void timebase_pre_save(void *opaque)
static int timebase_pre_save(void *opaque)
{
PPCTimebase *tb = opaque;
timebase_save(tb);
return 0;
}
const VMStateDescription vmstate_ppc_timebase = {