panicking 18 kernel/printk.c volatile int panicking = 0; // printing a panic message panicking 70 kernel/printk.c if (panicking == 0) panicking 131 kernel/printk.c if (panicking == 0) panicking 140 kernel/printk.c panicking = 1; panicking 45 kernel/uart.c extern volatile int panicking; // from printk.c panicking 105 kernel/uart.c if (panicking == 0) panicking 118 kernel/uart.c if (panicking == 0)