diff options
Diffstat (limited to 'arch/arm/kernel/reboot.c')
| -rw-r--r-- | arch/arm/kernel/reboot.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c index 38269358fd25..1a06da8f0366 100644 --- a/arch/arm/kernel/reboot.c +++ b/arch/arm/kernel/reboot.c @@ -6,6 +6,7 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ +#include <linux/console.h> #include <linux/cpu.h> #include <linux/delay.h> #include <linux/reboot.h> @@ -124,6 +125,31 @@ void machine_power_off(void) pm_power_off(); } +#ifdef CONFIG_ARM_FLUSH_CONSOLE_ON_RESTART +void arm_machine_flush_console(void) +{ + printk("\n"); + pr_emerg("Restarting %s\n", linux_banner); + if (console_trylock()) { + console_unlock(); + return; + } + + mdelay(50); + + local_irq_disable(); + if (!console_trylock()) + pr_emerg("arm_restart: Console was locked! Busting\n"); + else + pr_emerg("arm_restart: Console was locked!\n"); + console_unlock(); +} +#else +void arm_machine_flush_console(void) +{ +} +#endif + /* * Restart requires that the secondary CPUs stop performing any activity * while the primary CPU resets the system. Systems with a single CPU can @@ -140,6 +166,10 @@ void machine_restart(char *cmd) local_irq_disable(); smp_send_stop(); + /* Flush the console to make sure all the relevant messages make it + * out to the console drivers */ + arm_machine_flush_console(); + if (arm_pm_restart) arm_pm_restart(reboot_mode, cmd); else |