From b91eaf7267cf7aec0a4e087decf7770dfb694d78 Mon Sep 17 00:00:00 2001 From: "Andrea Parri (Microsoft)" Date: Tue, 19 Apr 2022 14:23:24 +0200 Subject: Drivers: hv: vmbus: Introduce {lock,unlock}_requestor() To abtract the lock and unlock operations on the requestor spin lock. The helpers will come in handy in hv_pci. No functional change. Suggested-by: Michael Kelley Signed-off-by: Andrea Parri (Microsoft) Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20220419122325.10078-6-parri.andrea@gmail.com Signed-off-by: Wei Liu --- include/linux/hyperv.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 2e4962a2fbec..460a716f4748 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1042,6 +1042,21 @@ struct vmbus_channel { u32 max_pkt_size; }; +#define lock_requestor(channel, flags) \ +do { \ + struct vmbus_requestor *rqstor = &(channel)->requestor; \ + \ + spin_lock_irqsave(&rqstor->req_lock, flags); \ +} while (0) + +static __always_inline void unlock_requestor(struct vmbus_channel *channel, + unsigned long flags) +{ + struct vmbus_requestor *rqstor = &channel->requestor; + + spin_unlock_irqrestore(&rqstor->req_lock, flags); +} + u64 vmbus_next_request_id(struct vmbus_channel *channel, u64 rqst_addr); u64 __vmbus_request_addr_match(struct vmbus_channel *channel, u64 trans_id, u64 rqst_addr); -- cgit v1.2.3-59-g8ed1b