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block: use aio_bh_schedule_oneshot

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This simplifies bottom half handlers by removing calls to qemu_bh_delete and
thus removing the need to stash the bottom half pointer in the opaque
datum.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-10-03 18:14:16 +02:00 • committed by Kevin Wolf
parent 5b8bb3595a
commit fffb6e1223
14 changed files with 27 additions and 81 deletions
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5
block/null.c
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@ -124,7 +124,6 @@ static coroutine_fn int null_co_flush(BlockDriverState *bs)
typedef struct {
BlockAIOCB common;
QEMUBH *bh;
QEMUTimer timer;
} NullAIOCB;
@ -136,7 +135,6 @@ static void null_bh_cb(void *opaque)
{
NullAIOCB *acb = opaque;
acb->common.cb(acb->common.opaque, 0);
qemu_bh_delete(acb->bh);
qemu_aio_unref(acb);
}
@ -164,8 +162,7 @@ static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,
timer_mod_ns(&acb->timer,
qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + s->latency_ns);
} else {
acb->bh = aio_bh_new(bdrv_get_aio_context(bs), null_bh_cb, acb);
qemu_bh_schedule(acb->bh);
aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), null_bh_cb, acb);
}
return &acb->common;
}