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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Borislav Petkov <bp@alien8.de>
Cc: lkml <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>, x86@kernel.org,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        David Airlie <airlied@linux.ie>, intel-gfx@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org
Subject: Re: Info: mapping multiple BARs. Your kernel is fine.
Date: Wed, 26 Feb 2014 14:57:16 +0100
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On Monday, February 24, 2014 05:24:00 PM Borislav Petkov wrote:
> This started happening this morning after booting -rc4+tip, let's
> add *everybody* to CC :-)

What about -rc4 without tip?

> We have intel_uncore_init, snb_uncore_imc_init_box, uncore_pci_probe and
> other goodies on the stack.
> 
> ...
> [    0.488998] software IO TLB [mem 0xcac30000-0xcec30000] (64MB) mapped at [ffff8800cac30000-ffff8800cec2ffff]
> [    0.489975] resource map sanity check conflict: 0xfed10000 0xfed15fff 0xfed10000 0xfed13fff pnp 00:01
> [    0.490079] ------------[ cut here ]------------
> [    0.490204] WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x372/0x380()
> [    0.490306] Info: mapping multiple BARs. Your kernel is fine.
> [    0.490371] Modules linked in:
> [    0.490558] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc4+ #1
> [    0.490642] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
> [    0.490742]  00000000000000ab ffff880213d01ad8 ffffffff816112e3 0000000000000006
> [    0.491032]  ffff880213d01b28 ffff880213d01b18 ffffffff8104e9bc ffff880213d01b08
> [    0.491343]  ffffc90000c58000 00000000fed10000 00000000fed10000 0000000000006000
> [    0.491631] Call Trace:
> [    0.493337]  [<ffffffff816112e3>] dump_stack+0x4f/0x7c
> [    0.493420]  [<ffffffff8104e9bc>] warn_slowpath_common+0x8c/0xc0
> [    0.493503]  [<ffffffff8104eaa6>] warn_slowpath_fmt+0x46/0x50
> [    0.493588]  [<ffffffff8103f1e2>] __ioremap_caller+0x372/0x380
> [    0.493674]  [<ffffffff810211a2>] ? snb_uncore_imc_init_box+0x62/0x90
> [    0.493761]  [<ffffffff8103f247>] ioremap_nocache+0x17/0x20
> [    0.493846]  [<ffffffff810211a2>] snb_uncore_imc_init_box+0x62/0x90
> [    0.493933]  [<ffffffff81022925>] uncore_pci_probe+0xe5/0x1e0
> [    0.494020]  [<ffffffff812d487e>] local_pci_probe+0x4e/0xa0
> [    0.494104]  [<ffffffff81418a59>] ? get_device+0x19/0x20
> [    0.494213]  [<ffffffff812d5cd1>] pci_device_probe+0xe1/0x130
> [    0.494300]  [<ffffffff8141d3cb>] driver_probe_device+0x7b/0x240
> [    0.494385]  [<ffffffff8141d63b>] __driver_attach+0xab/0xb0
> [    0.494469]  [<ffffffff8141d590>] ? driver_probe_device+0x240/0x240
> [    0.494551]  [<ffffffff8141b71e>] bus_for_each_dev+0x5e/0x90
> [    0.494634]  [<ffffffff8141cede>] driver_attach+0x1e/0x20
> [    0.494718]  [<ffffffff8141ca57>] bus_add_driver+0x117/0x230
> [    0.494802]  [<ffffffff8141dd34>] driver_register+0x64/0xf0
> [    0.494884]  [<ffffffff812d4c14>] __pci_register_driver+0x64/0x70
> [    0.494972]  [<ffffffff81d0319b>] ? uncore_types_init+0x19c/0x19c
> [    0.495056]  [<ffffffff81d03312>] intel_uncore_init+0x177/0x41c
> [    0.495155]  [<ffffffff81d0319b>] ? uncore_types_init+0x19c/0x19c
> [    0.495242]  [<ffffffff8100029e>] do_one_initcall+0x4e/0x170
> [    0.495326]  [<ffffffff81071100>] ? parse_args+0x60/0x360
> [    0.495411]  [<ffffffff81cfbfb8>] kernel_init_freeable+0x106/0x19a
> [    0.495497]  [<ffffffff81cfb83b>] ? do_early_param+0x86/0x86
> [    0.495582]  [<ffffffff81607ef0>] ? rest_init+0xd0/0xd0
> [    0.495666]  [<ffffffff81607efe>] kernel_init+0xe/0xf0
> [    0.495749]  [<ffffffff81621f6c>] ret_from_fork+0x7c/0xb0
> [    0.495831]  [<ffffffff81607ef0>] ? rest_init+0xd0/0xd0
> [    0.495921] ---[ end trace 428f365c054d9a01 ]---
> [    0.496196] RAPL PMU detected, hw unit 2^-16 Joules, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
> [    0.498598] futex hash table entries: 1024 (order: 5, 131072 bytes)
> [    0.498833] audit: initializing netlink subsys (disabled)
> [    0.499024] audit: type=2000 audit(1393259866.477:1): initialized
> ...
> 
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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