Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 29 insertions, 0 deletions

diff --git a/scripts/coccinelle/remove_local_err.cocci b/scripts/coccinelle/remove_local_err.cocci
new file mode 100644
index 000000000..9261c9968
--- /dev/null
+++ b/scripts/coccinelle/remove_local_err.cocci
@@ -0,0 +1,29 @@
+// Replace unnecessary usage of local_err variable with
+// direct usage of errp argument
+
+@@
+identifier F;
+expression list ARGS;
+expression F2;
+identifier LOCAL_ERR;
+identifier ERRP;
+idexpression V;
+typedef Error;
+@@
+ F(..., Error **ERRP)
+ {
+     ...
+-    Error *LOCAL_ERR;
+     ... when != LOCAL_ERR
+         when != ERRP
+(
+-    F2(ARGS, &LOCAL_ERR);
+-    error_propagate(ERRP, LOCAL_ERR);
++    F2(ARGS, ERRP);
+|
+-    V = F2(ARGS, &LOCAL_ERR);
+-    error_propagate(ERRP, LOCAL_ERR);
++    V = F2(ARGS, ERRP);
+)
+     ... when != LOCAL_ERR
+ }