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    Subject[PATCH 12/23] Update sysrq-B to use emergency_restart()
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    sysrq calls into the reboot path from an interrupt handler
    we can either push the code do into process context and
    call kernel_restart and get a clean reboot or we can simply
    reboot the machine, and increase our chances of actually
    rebooting. emergency_reboot() seems like the closest match
    to what we have previously done, and what we want.

    Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
    ---

    drivers/char/sysrq.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    d7b573e957fb71b166223ee15ea97c93c14f5faa
    diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
    --- a/drivers/char/sysrq.c
    +++ b/drivers/char/sysrq.c
    @@ -115,7 +115,7 @@ static void sysrq_handle_reboot(int key,
    struct tty_struct *tty)
    {
    local_irq_enable();
    - machine_restart(NULL);
    + emergency_restart();
    }

    static struct sysrq_key_op sysrq_reboot_op = {
    -
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