18c2ecf20Sopenharmony_ciClearing WARN_ONCE 28c2ecf20Sopenharmony_ci------------------ 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ciWARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once. 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ciecho 1 > /sys/kernel/debug/clear_warn_once 78c2ecf20Sopenharmony_ci 88c2ecf20Sopenharmony_ciclears the state and allows the warnings to print once again. 98c2ecf20Sopenharmony_ciThis can be useful after test suite runs to reproduce problems. 10