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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-03-10 18:43:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-12 17:16:41 +0100 |
| commit | b18896ff3a92fe320ad5262009f0b90e04b8a203 (patch) | |
| tree | dcd5f5627dfd98ccbca128109526c31ddca5a346 /drivers/tty | |
| parent | serial: core: Use string length for SysRq magic sequence (diff) | |
| download | linux-b18896ff3a92fe320ad5262009f0b90e04b8a203.tar.xz linux-b18896ff3a92fe320ad5262009f0b90e04b8a203.zip | |
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: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200310174337.74109-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index f5c8cf847532..c93d4e600f91 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -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); |