==========
shellcheck - FAILED


 ====== Checking before the patch ======
 ====== Checking the tree with the patch ======
tools/testing/selftests/net/ppp/ppp_common.sh is a new file, but not shellcheck compliant
New errors added
--- /tmp/tmp.Fw6LudCnmd	2026-03-20 03:36:44.365851097 -0400
+++ /tmp/tmp.1eL1UWpcas	2026-03-20 03:36:44.837846985 -0400
@@ -0,0 +1,18 @@
+
+In ppp_common.sh line 1:
+# SPDX-License-Identifier: GPL-2.0
+^-- SC2148 (error): Tips depend on target shell and yours is unknown. Add a shebang or a 'shell' directive.
+
+
+In ppp_common.sh line 32:
+	slowwait 10 ppp_check_addr "ppp0" "$IP_CLIENT" "$NS_CLIENT"
+                                                        ^--------^ SC2153 (info): Possible misspelling: NS_CLIENT may not be assigned. Did you mean IP_CLIENT?
+
+
+In ppp_common.sh line 36:
+	ip netns exec "$NS_SERVER" iperf3 -s -1 -D
+                       ^--------^ SC2153 (info): Possible misspelling: NS_SERVER may not be assigned. Did you mean IP_SERVER?
+
+For more information:
+  https://www.shellcheck.net/wiki/SC2148 -- Tips depend on target shell and y...
+  https://www.shellcheck.net/wiki/SC2153 -- Possible misspelling: NS_CLIENT m...