WARNING of __kunmap_atomic

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When I boot v2.6.39-rc5-mmotm-2011-04-29-16-25, I met following warning.
Is it know issue?


[    6.644411] Adding 8787964k swap on /dev/sda5.  Priority:-1
extents:1 across:8787964k
[    6.924492] udev: starting version 151
[    7.656468] ------------[ cut here ]------------
[    7.656474] WARNING: at arch/x86/mm/highmem_32.c:81
__kunmap_atomic+0xe6/0x100()
[    7.656476] Hardware name: Samsung DeskTop System
[    7.656477] Modules linked in: usbhid hid r8169 mii ahci libahci
[    7.656484] Pid: 520, comm: path_id Not tainted 2.6.39-rc5-mm1+ #30
[    7.656486] Call Trace:
[    7.656490]  [<c0146de2>] warn_slowpath_common+0x72/0xa0
[    7.656492]  [<c012caa6>] ? __kunmap_atomic+0xe6/0x100
[    7.656495]  [<c012caa6>] ? __kunmap_atomic+0xe6/0x100
[    7.656497]  [<c0146e32>] warn_slowpath_null+0x22/0x30
[    7.656499]  [<c012caa6>] __kunmap_atomic+0xe6/0x100
[    7.656503]  [<c01f940c>] unmap_vmas+0x35c/0x590
[    7.656506]  [<c017c76b>] ? trace_hardirqs_on+0xb/0x10
[    7.656510]  [<c019a065>] ? cpuset_mems_allowed+0x55/0x60
[    7.656513]  [<c01ff8b9>] exit_mmap+0x89/0x120
[    7.656516]  [<c0149a53>] ? exit_mm+0xb3/0x130
[    7.656518]  [<c0144d5c>] mmput+0x5c/0x100
[    7.656520]  [<c0149a9f>] exit_mm+0xff/0x130
[    7.656523]  [<c0149f2f>] do_exit+0x12f/0x730
[    7.656526]  [<c0226240>] ? vfs_write+0x100/0x170
[    7.656529]  [<c0225b90>] ? do_sync_readv_writev+0xe0/0xe0
[    7.656531]  [<c014a56e>] do_group_exit+0x3e/0xa0
[    7.656533]  [<c014a5e8>] sys_exit_group+0x18/0x20
[    7.656537]  [<c05e6adf>] sysenter_do_call+0x12/0x38
[    7.656539] ---[ end trace 8ce27ef371f66897 ]---
[    8.042152] Linux agpgart interface v0.103
[    8.137651] lp: driver loaded but no devices found
[    8.372434] [drm] Initialized drm 1.1.0 20060810


== memory map ==


[    0.000000] allocated 12844800 bytes of page_cgroup
[    0.000000] please try 'cgroup_disable=memory' option if you don't
want memory cgroups
[    0.000000] Initializing HighMem for node 0 (000377fe:000c4000)
[    0.000000] Memory: 3140164k/3211264k available (5023k kernel code,
70640k reserved, 2192k data, 676k init, 2301960k highmem)
[    0.000000] virtual kernel memory layout:
[    0.000000]     fixmap  : 0xffe6d000 - 0xfffff000   (1608 kB)
[    0.000000]     pkmap   : 0xff800000 - 0xffc00000   (4096 kB)
[    0.000000]     vmalloc : 0xf7ffe000 - 0xff7fe000   ( 120 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xf77fe000   ( 887 MB)
[    0.000000]       .init : 0xc080c000 - 0xc08b5000   ( 676 kB)
[    0.000000]       .data : 0xc05e7e1d - 0xc080bf00   (2192 kB)
[    0.000000]       .text : 0xc0100000 - 0xc05e7e1d   (5023 kB)
[    0.000000] Checking if this processor honours the WP bit even in
supervisor mode...Ok.


-- 
Kind regards,
Minchan Kim

Attachment: config-v2.6.39-rc5-mmotm-2011-04-29-16-25
Description: Binary data


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