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When executing the command "make -C tools/testing/selftests TARGETS=livepatch run_tests", the following error message was reported. TEST: livepatch interaction with ftrace_enabled sysctl ... not ok ... livepatch: sysctlo : setting key "kernel.ftrace_enabled": Device or resource busy livepatch: sysctl: setting key "kernel.ftrace_enabled": 设备或资源忙 ... ERROR: livepatch kselftest(s) failed not ok 5 selftests: livepatch: test-ftrace.sh # exit=1 To fix it, set LC_ALL=C. Signed-off-by: Qiang Ma <maqianga@uniontech.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Petr Mladek <pmladek@suse.com> Link: https://patch.msgid.link/20260527095929.1504032-1-maqianga@uniontech.com Signed-off-by: Petr Mladek <pmladek@suse.com>