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    Subject[PATCH 4.9 45/72] parisc: Avoid stalled CPU warnings after system shutdown
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Helge Deller <deller@gmx.de>

    commit 476e75a44b56038bee9207242d4bc718f6b4de06 upstream.

    Commit 73580dac7618 ("parisc: Fix system shutdown halt") introduced an endless
    loop for systems which don't provide a software power off function. But the
    soft lockup detector will detect this and report stalled CPUs after some time.
    Avoid those unwanted warnings by disabling the soft lockup detector.

    Fixes: 73580dac7618 ("parisc: Fix system shutdown halt")
    Signed-off-by: Helge Deller <deller@gmx.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/parisc/kernel/process.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/arch/parisc/kernel/process.c
    +++ b/arch/parisc/kernel/process.c
    @@ -140,6 +140,8 @@ void machine_power_off(void)
    printk(KERN_EMERG "System shut down completed.\n"
    "Please power this system off now.");

    + /* prevent soft lockup/stalled CPU messages for endless loop. */
    + rcu_sysrq_start();
    for (;;);
    }


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