diff options
Diffstat (limited to 'drivers/char/sysrq.c')
| -rw-r--r-- | drivers/char/sysrq.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index f59f7cbd525..feb25158c8e 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -35,6 +35,7 @@ #include <linux/spinlock.h> #include <linux/vt_kern.h> #include <linux/workqueue.h> +#include <linux/kexec.h> #include <asm/ptrace.h> @@ -94,12 +95,27 @@ static struct sysrq_key_op sysrq_unraw_op = { }; #endif /* CONFIG_VT */ +#ifdef CONFIG_KEXEC +/* crashdump sysrq handler */ +static void sysrq_handle_crashdump(int key, struct pt_regs *pt_regs, + struct tty_struct *tty) +{ + crash_kexec(pt_regs); +} +static struct sysrq_key_op sysrq_crashdump_op = { + .handler = sysrq_handle_crashdump, + .help_msg = "Crashdump", + .action_msg = "Trigger a crashdump", + .enable_mask = SYSRQ_ENABLE_DUMP, +}; +#endif + /* reboot sysrq handler */ static void sysrq_handle_reboot(int key, struct pt_regs *pt_regs, struct tty_struct *tty) { local_irq_enable(); - machine_restart(NULL); + emergency_restart(); } static struct sysrq_key_op sysrq_reboot_op = { @@ -212,7 +228,7 @@ static struct sysrq_key_op sysrq_term_op = { static void moom_callback(void *ignored) { - out_of_memory(GFP_KERNEL); + out_of_memory(GFP_KERNEL, 0); } static DECLARE_WORK(moom_work, moom_callback, NULL); @@ -273,8 +289,12 @@ static struct sysrq_key_op *sysrq_key_table[SYSRQ_KEY_TABLE_LENGTH] = { it is handled specially on the sparc and will never arrive */ /* b */ &sysrq_reboot_op, -/* c */ NULL, -/* d */ NULL, +#ifdef CONFIG_KEXEC +/* c */ &sysrq_crashdump_op, +#else +/* c */ NULL, +#endif +/* d */ NULL, /* e */ &sysrq_term_op, /* f */ &sysrq_moom_op, /* g */ NULL, |