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    Subject[PATCH AUTOSEL 4.14 34/99] uml: fix a boot splat wrt use of cpu_all_mask
    Date
    From: Maciej Żenczykowski <maze@google.com>

    [ Upstream commit 689a58605b63173acb0a8cf954af6a8f60440c93 ]

    Memory: 509108K/542612K available (3835K kernel code, 919K rwdata, 1028K rodata, 129K init, 211K bss, 33504K reserved, 0K cma-reserved)
    NR_IRQS: 15
    clocksource: timer: mask: 0xffffffffffffffff max_cycles: 0x1cd42e205, max_idle_ns: 881590404426 ns
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 0 at kernel/time/clockevents.c:458 clockevents_register_device+0x72/0x140
    posix-timer cpumask == cpu_all_mask, using cpu_possible_mask instead
    Modules linked in:
    CPU: 0 PID: 0 Comm: swapper Not tainted 5.1.0-rc4-00048-ged79cc87302b #4
    Stack:
    604ebda0 603c5370 604ebe20 6046fd17
    00000000 6006fcbb 604ebdb0 603c53b5
    604ebe10 6003bfc4 604ebdd0 9000001ca
    Call Trace:
    [<6006fcbb>] ? printk+0x0/0x94
    [<60083160>] ? clockevents_register_device+0x72/0x140
    [<6001f16e>] show_stack+0x13b/0x155
    [<603c5370>] ? dump_stack_print_info+0xe2/0xeb
    [<6006fcbb>] ? printk+0x0/0x94
    [<603c53b5>] dump_stack+0x2a/0x2c
    [<6003bfc4>] __warn+0x10e/0x13e
    [<60070320>] ? vprintk_func+0xc8/0xcf
    [<60030fd6>] ? block_signals+0x0/0x16
    [<6006fcbb>] ? printk+0x0/0x94
    [<6003c08b>] warn_slowpath_fmt+0x97/0x99
    [<600311a1>] ? set_signals+0x0/0x3f
    [<6003bff4>] ? warn_slowpath_fmt+0x0/0x99
    [<600842cb>] ? tick_oneshot_mode_active+0x44/0x4f
    [<60030fd6>] ? block_signals+0x0/0x16
    [<6006fcbb>] ? printk+0x0/0x94
    [<6007d2d5>] ? __clocksource_select+0x20/0x1b1
    [<60030fd6>] ? block_signals+0x0/0x16
    [<6006fcbb>] ? printk+0x0/0x94
    [<60083160>] clockevents_register_device+0x72/0x140
    [<60031192>] ? get_signals+0x0/0xf
    [<60030fd6>] ? block_signals+0x0/0x16
    [<6006fcbb>] ? printk+0x0/0x94
    [<60002eec>] um_timer_setup+0xc8/0xca
    [<60001b59>] start_kernel+0x47f/0x57e
    [<600035bc>] start_kernel_proc+0x49/0x4d
    [<6006c483>] ? kmsg_dump_register+0x82/0x8a
    [<6001de62>] new_thread_handler+0x81/0xb2
    [<60003571>] ? kmsg_dumper_stdout_init+0x1a/0x1c
    [<60020c75>] uml_finishsetup+0x54/0x59

    random: get_random_bytes called from init_oops_id+0x27/0x34 with crng_init=0
    ---[ end trace 00173d0117a88acb ]---
    Calibrating delay loop... 6941.90 BogoMIPS (lpj=34709504)

    Signed-off-by: Maciej Żenczykowski <maze@google.com>
    Cc: Jeff Dike <jdike@addtoit.com>
    Cc: Richard Weinberger <richard@nod.at>
    Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
    Cc: linux-um@lists.infradead.org
    Cc: linux-kernel@vger.kernel.org

    Signed-off-by: Richard Weinberger <richard@nod.at>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/um/kernel/time.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
    index 7f69d17de3540..9b21ae892009f 100644
    --- a/arch/um/kernel/time.c
    +++ b/arch/um/kernel/time.c
    @@ -56,7 +56,7 @@ static int itimer_one_shot(struct clock_event_device *evt)
    static struct clock_event_device timer_clockevent = {
    .name = "posix-timer",
    .rating = 250,
    - .cpumask = cpu_all_mask,
    + .cpumask = cpu_possible_mask,
    .features = CLOCK_EVT_FEAT_PERIODIC |
    CLOCK_EVT_FEAT_ONESHOT,
    .set_state_shutdown = itimer_shutdown,
    --
    2.20.1
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