linux-kernel - Linux 4.4: warning ioremap.c:198

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Message-ID: <569454A1.9030005@interlog.com>
Date:	Tue, 12 Jan 2016 02:19:29 +0100
From:	Douglas Gilbert <dgilbert@...erlog.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Linux 4.4: warning ioremap.c:198

Just noticed the warning shown below in lk 4.4 . Checked my previous
kernel which was lk 4.3.3 and it gets the warning as well. The machine
is a Lenovo X240 laptop.

Doug Gilbert


...
resource sanity check: requesting [mem 0xfed10000-0xfed15fff], which spans more 
than pnp 00:01 [mem 0xfed10000-0xfed13fff]
------------[ cut here ]------------
WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:198 __ioremap_caller+0x205/0x360()
Info: mapping multiple BARs. Your kernel is fine.
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.4.0 #243
Hardware name: LENOVO 20ALCTO1WW/20ALCTO1WW, BIOS GIET75WW (2.25 ) 06/24/2014
  ffffffff817fbf6b ffff880119963ba0 ffffffff813151dc ffff880119963be8
  ffff880119963bd8 ffffffff81055f76 ffffc90000068000 ffffc90000068000
  00000000fed10000 0000000000000000 ffff8800c9d10fc0 ffff880119963c38
Call Trace:
  [<ffffffff813151dc>] dump_stack+0x4e/0x82
  [<ffffffff81055f76>] warn_slowpath_common+0x86/0xc0
  [<ffffffff81055ffc>] warn_slowpath_fmt+0x4c/0x50
  [<ffffffff8105d1c7>] ? iomem_map_sanity_check+0x97/0xd0
  [<ffffffff81045c85>] __ioremap_caller+0x205/0x360
  [<ffffffff81045df7>] ioremap_nocache+0x17/0x20
  [<ffffffff8102665d>] snb_uncore_imc_init_box+0x6d/0x90
  [<ffffffff81024cd5>] uncore_pci_probe+0xc5/0x1d0
  [<ffffffff81352cfc>] pci_device_probe+0x8c/0x100
  [<ffffffff81404d9b>] driver_probe_device+0x1fb/0x310
  [<ffffffff81404f38>] __driver_attach+0x88/0x90
  [<ffffffff81404eb0>] ? driver_probe_device+0x310/0x310
  [<ffffffff81402de6>] bus_for_each_dev+0x66/0xa0
  [<ffffffff814047fe>] driver_attach+0x1e/0x20
  [<ffffffff81404418>] bus_add_driver+0x1b8/0x230
  [<ffffffff819b8c23>] ? uncore_types_exit+0x26/0x26
  [<ffffffff81405ba0>] driver_register+0x60/0xe0
  [<ffffffff813514cd>] __pci_register_driver+0x5d/0x60
  [<ffffffff819b8d05>] intel_uncore_init+0xe2/0x2d1
  [<ffffffff819b8c23>] ? uncore_types_exit+0x26/0x26
  [<ffffffff810003c9>] do_one_initcall+0x99/0x1e0
  [<ffffffff819ae08e>] kernel_init_freeable+0x1ac/0x236
  [<ffffffff81611ac0>] ? rest_init+0x140/0x140
  [<ffffffff81611ace>] kernel_init+0xe/0xe0
  [<ffffffff8161b1bf>] ret_from_fork+0x3f/0x70
  [<ffffffff81611ac0>] ? rest_init+0x140/0x140
---[ end trace c7054f9c46af802f ]---