[PATCH v3 1/4] misc: vmw_vmci: Reserve a datagram resource id for zero-copy buffer sharing

[Rishi Chhibber]

Summary of changes:
- Add VMCI_VMWZC_DST_RID to the reserved hypervisor datagram resource id
  enum and bump VMCI_RESOURCE_MAX accordingly

The hypervisor-side zero-copy buffer sharing service occupies its own
resource id in the hypervisor datagram namespace. Reserve a name for it
alongside the existing entries rather than leaving callers to open-code the
number, following the procedure described in that enum's own comment: the
set of resource ids available in the hypervisor is fixed and statically
known, and a new caller extends it by incrementing the maximum.

VMCI_RESOURCE_MAX has no in-tree users, so the bump does not affect
existing code. The new entry likewise has no in-tree user until the
vmw_zerocopy driver, added later in this series, references it.

Signed-off-by: Rishi Chhibber <rishi.chhibber@xxxxxxxxxxxx>
Reviewed-by: Alexey Makhalov <alexey.makhalov@xxxxxxxxxxxx>
Reviewed-by: Vishnu Dasa <vishnu.dasa@xxxxxxxxxxxx>
---
 include/linux/vmw_vmci_defs.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/vmw_vmci_defs.h b/include/linux/vmw_vmci_defs.h
index 60c9eacd2cf3..4435d2ff1241 100644
--- a/include/linux/vmw_vmci_defs.h
+++ b/include/linux/vmw_vmci_defs.h
@@ -179,7 +179,8 @@ enum {
 	VMCI_UNITY_PBRPC_REGISTER = 14,
 	VMCI_RPC_PRIVILEGED = 15,
 	VMCI_RPC_UNPRIVILEGED = 16,
-	VMCI_RESOURCE_MAX = 17,
+	VMCI_VMWZC_DST_RID = 17,
+	VMCI_RESOURCE_MAX = 18,
 };
 
 /*
-- 
2.52.0