From: "Mathieu J. Poirier" <mathieu.poirier@xxxxxxxxxx>
Attempt to reboot the system gracefully when a key combo
is detected. The system is force to go down if the first
attempt failed and the key combo is pressed a second time.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/tty/sysrq.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 766878a..bd852fc 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -43,6 +43,7 @@
#include <linux/uaccess.h>
#include <linux/moduleparam.h>
#include <linux/jiffies.h>
+#include <linux/syscalls.h>
#include <asm/ptrace.h>
#include <asm/irq_regs.h>
@@ -584,6 +585,7 @@ struct sysrq_state {
/* reset sequence handling */
bool reset_canceled;
+ bool reset_requested;
unsigned long reset_keybit[BITS_TO_LONGS(KEY_CNT)];
int reset_seq_len;
int reset_seq_cnt;
@@ -624,11 +626,17 @@ static void sysrq_parse_reset_sequence(struct sysrq_state *state)
static void sysrq_do_reset(unsigned long dummy)
{
- __handle_sysrq(sysrq_xlate[KEY_B], false);
+ sys_sync();
+ kernel_restart(NULL);
}
static void sysrq_handle_reset_request(struct sysrq_state *state)
{
+ if (state->reset_requested)
+ __handle_sysrq(sysrq_xlate[KEY_B], false);
+
+ state->reset_requested = true;
+
if (sysrq_reset_downtime_ms)
mod_timer(&state->keyreset_timer,
jiffies + msecs_to_jiffies(sysrq_reset_downtime_ms));
--
1.7.9.5
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