WARNING: at arch/x86/mm/pageattr.c:591 __change_page_attr_set_clr [mmotm]

Hi,

mmotm 2008-07-15-15-39 while booting:

EXT3 FS on dm-0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.

------------[ cut here ]------------
WARNING: at arch/x86/mm/pageattr.c:591 __change_page_attr_set_clr+0x627/0x990()
CPA: called for zero pte. vaddr = ffff88007d5b0000 cpa->vaddr = ffff88007d5b0000
Modules linked in: arc4 ecb crypto_blkcipher cryptomgr crypto_algapi ath5k mac80211 led_class ohci1394 usbhid rtc_cmos hid cfg80211 ieee1394 floppy evdev ff_memless [last unloaded: freq_table]

Pid: 2024, comm: acpidump Not tainted 2.6.26-mm1_64 #1

Call Trace:
 [<ffffffff80238d27>] warn_slowpath+0xb7/0xf0
 [<ffffffff80280b00>] ? filemap_fault+0x240/0x440
 [<ffffffff802a8bc5>] ? check_object+0x255/0x260
 [<ffffffff802a8410>] ? init_object+0x50/0x90
 [<ffffffff802a8410>] ? init_object+0x50/0x90
 [<ffffffff802c3b3c>] ? d_free+0x6c/0x80
 [<ffffffff802c50f1>] ? __d_lookup+0xb1/0x150
 [<ffffffff80225517>] __change_page_attr_set_clr+0x627/0x990
 [<ffffffff802b910d>] ? permission+0xbd/0x140
 [<ffffffff802a8bc5>] ? check_object+0x255/0x260
 [<ffffffff802a8410>] ? init_object+0x50/0x90
 [<ffffffff80225922>] change_page_attr_set_clr+0xa2/0x1f0
 [<ffffffff80225c43>] _set_memory_uc+0x13/0x20
 [<ffffffff8022466d>] ioremap_change_attr+0x2d/0x50
 [<ffffffff80226ad6>] phys_mem_access_prot_allowed+0x146/0x1d0
 [<ffffffff8039d975>] mmap_mem+0x35/0xb0
 [<ffffffff802998de>] mmap_region+0x21e/0x5d0
 [<ffffffff80299f24>] do_mmap_pgoff+0x294/0x390
 [<ffffffff80211256>] sys_mmap+0x106/0x130
 [<ffffffff8020c4db>] system_call_after_swapgs+0x7b/0x80

---[ end trace 34f56e4f17f94b6d ]---

acpidump:2024 /dev/mem ioremap_change_attr failed uncached-minus for 7d5b0000-7d5b1000

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Hmm, I think it's known:
http://marc.info/?l=linux-acpi&m=121607842728729&w=2

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