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block: access wakeup with atomic ops

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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170605123908.18777-6-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-06-05 14:38:54 +02:00 • committed by Fam Zheng
parent 20fc71b25c
commit e2a6ae7fe5
5 changed files with 15 additions and 7 deletions
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4
block/nfs.c
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@ -730,7 +730,9 @@ nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data,
if (task->ret < 0) {
error_report("NFS Error: %s", nfs_get_error(nfs));
}
task->complete = 1;
/* Set task->complete before reading bs->wakeup. */
atomic_mb_set(&task->complete, 1);
bdrv_wakeup(task->bs);
}