Commit b18896ff authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman
Browse files

serial: core: Print escaped SysRq Magic sequence if enabled 



It is useful to see on the serial console the magic sequence itself
to enable SysRq without rummaging source code.

Reviewed-by: default avatarDmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200310174337.74109-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2ce5eace

drivers/tty/serial/serial_core.c

+4 −1
Original line number Diff line number Diff line
@@ -3092,8 +3092,11 @@ static const char sysrq_toggle_seq[] = CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE; 


static void uart_sysrq_on(struct work_struct *w)

{

	int sysrq_toggle_seq_len = strlen(sysrq_toggle_seq);



	sysrq_toggle_support(1);

	pr_info("SysRq is enabled by magic sequence on serial\n");

	pr_info("SysRq is enabled by magic sequence '%*pE' on serial\n",

		sysrq_toggle_seq_len, sysrq_toggle_seq);

}

static DECLARE_WORK(sysrq_enable_work, uart_sysrq_on);

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