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Drivers: hv: vmbus: Add a helper function is_sub_channel()

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The existing method of telling if a channel is sub-channel in
vmbus_process_offer() is cumbersome. This new simple helper function
is preferred in future.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dexuan Cui 2019-09-05 23:01:16 +00:00 committed by Sasha Levin
parent 63ecc6d22c
commit ed56ef675a
1 changed files with 9 additions and 1 deletions
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10
include/linux/hyperv.h
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@ -245,7 +245,10 @@ struct vmbus_channel_offer {
} pipe;
} u;
/*
* The sub_channel_index is defined in win8.
* The sub_channel_index is defined in Win8: a value of zero means a
* primary channel and a value of non-zero means a sub-channel.
*
* Before Win8, the field is reserved, meaning it's always zero.
*/
u16 sub_channel_index;
u16 reserved3;
@ -934,6 +937,11 @@ static inline bool is_hvsock_channel(const struct vmbus_channel *c)
VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
}
static inline bool is_sub_channel(const struct vmbus_channel *c)
{
return c->offermsg.offer.sub_channel_index != 0;
}
static inline void set_channel_affinity_state(struct vmbus_channel *c,
enum hv_numa_policy policy)
{