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From: Dave Young on 7 Feb 2010 04:40
Hi,

i915 try to ioremap normal ram, please see following warning:

[ 1.850361] ------------[ cut here ]------------
[ 1.850409] WARNING: at arch/x86/mm/ioremap.c:111 __ioremap_caller+0xcc/0x241()
[ 1.850774] Hardware name: Latitude E5400
[ 1.851172] Modules linked in:
[ 1.851593] Pid: 1, comm: swapper Not tainted 2.6.33-rc6-mm1 #1
[ 1.852061] Call Trace:
[ 1.852527] [<c102ea1e>] warn_slowpath_common+0x60/0x90
[ 1.853059] [<c102ea5b>] warn_slowpath_null+0xd/0x10
[ 1.853618] [<c101c4ae>] __ioremap_caller+0xcc/0x241
[ 1.854194] [<c11b67e5>] ? pci_bus_read_config_dword+0x57/0x63
[ 1.854835] [<c101c693>] ioremap_nocache+0x10/0x12
[ 1.855502] [<c125aa41>] ? intel_opregion_init+0x8a/0x2ed
[ 1.856182] [<c125aa41>] intel_opregion_init+0x8a/0x2ed
[ 1.856912] [<c123ad02>] i915_driver_load+0x916/0x984
[ 1.857640] [<c123126d>] drm_get_dev+0x32d/0x3fc
[ 1.858411] [<c13c444d>] i915_pci_probe+0xd/0xf
[ 1.859202] [<c11bac08>] local_pci_probe+0xe/0x10
[ 1.860037] [<c11bb760>] pci_device_probe+0x43/0x66
[ 1.860877] [<c126618c>] driver_probe_device+0xcb/0x1eb
[ 1.861751] [<c12662f3>] __driver_attach+0x47/0x63
[ 1.862657] [<c1265a43>] bus_for_each_dev+0x3d/0x67
[ 1.863599] [<c1265f8f>] driver_attach+0x14/0x16
[ 1.864546] [<c12662ac>] ? __driver_attach+0x0/0x63
[ 1.865542] [<c126541c>] bus_add_driver+0xc4/0x20c
[ 1.866545] [<c1266553>] driver_register+0x8b/0xeb
[ 1.867601] [<c11acac7>] ? __raw_spin_lock_init+0x24/0x49
[ 1.868638] [<c11bb94d>] __pci_register_driver+0x4c/0xa5
[ 1.869657] [<c122d199>] drm_init+0x58/0xb0
[ 1.870669] [<c1660da4>] ? i915_init+0x0/0x4d
[ 1.871671] [<c1660def>] i915_init+0x4b/0x4d
[ 1.872654] [<c1001139>] do_one_initcall+0x4c/0x13f
[ 1.873645] [<c163d315>] kernel_init+0x123/0x174
[ 1.874585] [<c163d1f2>] ? kernel_init+0x0/0x174
[ 1.875525] [<c10035ba>] kernel_thread_helper+0x6/0x10
[ 1.876464] ---[ end trace 890121b055b2c551 ]---
[ 1.877381] ioremap reserve_memtype failed -22
[ 1.878299] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
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