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rcu: Implement drain_call_rcu

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This will allow is to preserve the semantics of hmp_device_del,
that the device is deleted immediatly which was changed by previos
patch that delayed this to RCU callback

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Suggested-by: Stefan Hajnoczi <stefanha@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200915121318.247-2-luoyonggang@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Maxim Levitsky 2020-09-15 20:12:53 +08:00 • committed by Thomas Huth
parent 37d98abdc7
commit d816614ca4
2 changed files with 56 additions and 0 deletions
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include/qemu/rcu.h
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@ -133,6 +133,7 @@ struct rcu_head {
};
extern void call_rcu1(struct rcu_head *head, RCUCBFunc *func);
extern void drain_call_rcu(void);
/* The operands of the minus operator must have the same type,
* which must be the one that we specify in the cast.