[PATCH 1/6] tracetool: rename variable with conflicting types

[Paolo Bonzini <pbonzini@redhat.com>]

"backend" is used as both a string and a backend.Wrapper.  In preparation
for adding type annotations, use different names.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/tracetool/__init__.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index 74062d21a7c..85527c08c98 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -566,9 +566,9 @@ def generate(events, group, format, backends,
 
     if len(backends) == 0:
         raise TracetoolError("no backends specified")
-    for backend in backends:
-        if not tracetool.backend.exists(backend):
-            raise TracetoolError("unknown backend: %s" % backend)
+    for backend_name in backends:
+        if not tracetool.backend.exists(backend_name):
+            raise TracetoolError("unknown backend: %s" % backend_name)
     backend = tracetool.backend.Wrapper(backends, format)
 
     import tracetool.backend.dtrace
-- 
2.51.0