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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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7
block/curl.c
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@ -96,7 +96,6 @@ struct BDRVCURLState;
typedef struct CURLAIOCB {
BlockAIOCB common;
QEMUBH *bh;
QEMUIOVector *qiov;
int64_t sector_num;
@ -739,9 +738,6 @@ static void curl_readv_bh_cb(void *p)
CURLAIOCB *acb = p;
BDRVCURLState *s = acb->common.bs->opaque;
qemu_bh_delete(acb->bh);
acb->bh = NULL;
size_t start = acb->sector_num * SECTOR_SIZE;
size_t end;
@ -805,8 +801,7 @@ static BlockAIOCB *curl_aio_readv(BlockDriverState *bs,
acb->sector_num = sector_num;
acb->nb_sectors = nb_sectors;
acb->bh = aio_bh_new(bdrv_get_aio_context(bs), curl_readv_bh_cb, acb);
qemu_bh_schedule(acb->bh);
aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), curl_readv_bh_cb, acb);
return &acb->common;
}