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Drivers: hv: vmbus: Introduce {lock,unlock}_requestor()

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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 <mikelley@microsoft.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20220419122325.10078-6-parri.andrea@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Andrea Parri (Microsoft)
2022-04-19 14:23:24 +02:00
committed by Wei Liu
parent 0aadb6a7bb
commit b91eaf7267
2 changed files with 20 additions and 6 deletions
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include/linux/hyperv.h
+15
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@@ -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);