diff options
| author | Andrea Parri (Microsoft) <parri.andrea@gmail.com> | 2022-04-19 14:23:24 +0200 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-04-25 15:51:13 +0000 |
| commit | b91eaf7267cf7aec0a4e087decf7770dfb694d78 (patch) | |
| tree | 2d765372e172cc792be1e0c0ec024a644226222d /include/linux/hyperv.h | |
| parent | 0aadb6a7bb811554cf39318b5d18e8ec50dd9f02 (diff) | |
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 <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>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 15 |
1 files changed, 15 insertions, 0 deletions
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); |