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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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