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    SubjectRe: [PATCH tip/core/rcu 0/2] rcu: fixes for RCU lockdep

    plus:

    skge eth0: Link is up at 1000 Mbps, full duplex, flow control both

    =================================
    [ INFO: inconsistent lock state ]
    2.6.33-tip+ #10436
    ---------------------------------
    inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
    swapper/0 [HC0[0]:SC0[0]:HE1:SE1] takes:
    (&(&base->lock)->rlock){+.?.-.}, at: [<ffffffff8107c688>] get_next_timer_interrupt+0x35/0x214
    {IN-SOFTIRQ-W} state was registered at:
    [<ffffffff81099096>] mark_irqflags+0x75/0x125
    [<ffffffff8109a749>] __lock_acquire+0x207/0x368
    [<ffffffff8109a986>] lock_acquire+0xdc/0x102
    [<ffffffff81ee928c>] _raw_spin_lock_irq+0x42/0x77
    [<ffffffff8107bdaa>] run_timer_softirq+0x4f/0x2c1
    [<ffffffff81077716>] __do_softirq+0xf8/0x1cd
    [<ffffffff81029bbc>] call_softirq+0x1c/0x28
    [<ffffffff8102b6ab>] do_softirq+0x4b/0x92
    [<ffffffff8107735c>] irq_exit+0x4a/0x8c
    [<ffffffff81eea4f4>] do_IRQ+0xac/0xc3
    [<ffffffff81ee9d53>] ret_from_intr+0x0/0x16
    [<ffffffff81ee9b23>] _raw_spin_unlock_irqrestore+0x51/0x56
    [<ffffffff810b782a>] __setup_irq+0x220/0x2c6
    [<ffffffff810b7a1a>] setup_irq+0x23/0x28
    [<ffffffff82b99220>] setup_default_timer_irq+0x12/0x14
    [<ffffffff82b99239>] hpet_time_init+0x17/0x19
    [<ffffffff82b99207>] x86_late_time_init+0xa/0x11
    [<ffffffff82b95cfe>] start_kernel+0x2c1/0x34e
    [<ffffffff82b952a0>] x86_64_start_reservations+0xa7/0xab
    [<ffffffff82b9539c>] x86_64_start_kernel+0xf8/0x107
    irq event stamp: 342029
    hardirqs last enabled at (342029): [<ffffffff810ba87b>] rcu_do_batch+0x1e4/0x20f
    hardirqs last disabled at (342028): [<ffffffff810ba7a2>] rcu_do_batch+0x10b/0x20f
    softirqs last enabled at (342026): [<ffffffff81d26ade>] __dst_free+0xb4/0xb8
    softirqs last disabled at (342025): [<ffffffff81ee945f>] _raw_spin_lock_bh+0x1c/0x6e

    other info that might help us debug this:
    no locks held by swapper/0.

    stack backtrace:
    Pid: 0, comm: swapper Not tainted 2.6.33-tip+ #10436
    Call Trace:
    [<ffffffff81098d80>] print_usage_bug+0x154/0x165
    [<ffffffff810997fb>] ? check_usage_backwards+0x0/0x81
    [<ffffffff81098de0>] valid_state+0x4f/0x5a
    [<ffffffff81098e34>] mark_lock_irq+0x49/0xef
    [<ffffffff81098fbd>] mark_lock+0xe3/0x147
    [<ffffffff810990fc>] mark_irqflags+0xdb/0x125
    [<ffffffff8109a749>] __lock_acquire+0x207/0x368
    [<ffffffff81077573>] ? _local_bh_enable_ip+0xbc/0xc5
    [<ffffffff81077573>] ? _local_bh_enable_ip+0xbc/0xc5
    [<ffffffff8109a986>] lock_acquire+0xdc/0x102
    [<ffffffff8107c688>] ? get_next_timer_interrupt+0x35/0x214
    [<ffffffff810ba87b>] ? rcu_do_batch+0x1e4/0x20f
    [<ffffffff81ee918b>] _raw_spin_lock+0x36/0x69
    [<ffffffff8107c688>] ? get_next_timer_interrupt+0x35/0x214
    [<ffffffff8107c688>] get_next_timer_interrupt+0x35/0x214
    [<ffffffff810ba940>] ? __rcu_process_callbacks+0x9a/0x9f
    [<ffffffff8109623b>] tick_nohz_stop_sched_tick+0x38f/0x3b8
    [<ffffffff81027d57>] cpu_idle+0x2f/0xbf
    [<ffffffff81e61bef>] rest_init+0xc3/0xca
    [<ffffffff81e61b2c>] ? rest_init+0x0/0xca
    [<ffffffff82b95d83>] start_kernel+0x346/0x34e
    [<ffffffff82b952a0>] x86_64_start_reservations+0xa7/0xab
    [<ffffffff82b9539c>] x86_64_start_kernel+0xf8/0x107



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