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e42c349f4c
run_kernel() cleanup and signal_handler() invoke stty unconditionally. When stdin is not a tty (for example in CI or unit tests), this writes noise to stderr. Call stty only when stdin is a tty. Add regression tests for these paths: - run_kernel() with non-tty stdin - signal_handler() with non-tty stdin - signal_handler() with tty stdin Signed-off-by: Shuvam Pandey <shuvampandey1@gmail.com> Reviewed-by: David Gow <david@davidgow.net> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>