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Date: Sat, 28 Sep 2002 22:07:51 -0700
From: Andrew Morton <akpm@digeo.com>
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To: thunder7@xs4all.nl, Thomas Molina <tmolina@cox.net>
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Subject: Re: 2.5.39: SMP, pre-empt, ide-scsi 'sleeping function called from 
 illegal context' during boot
References: <20020929044524.GA739@middle.of.nowhere>
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Jurriaan wrote:
> 
> ...
> Call Trace:
>  [<c0118554>]__might_sleep+0x54/0x58
>  [<c0135dd3>]kmalloc+0x5b/0x1d4
>  [<c0134905>]get_vm_area+0x29/0x11c
>  [<c0134bf2>]__vmalloc+0x32/0x10c
>  [<c0134ce1>]vmalloc+0x15/0x1c
>  [<c021680c>]sg_init+0xa0/0x138
>  [<c01fcace>]scsi_register_device+0x76/0x120
>  [<c01050ab>]init+0x47/0x1bc
>  [<c0105064>]init+0x0/0x1bc
>  [<c0105501>]kernel_thread_helper+0x5/0xc
> 

sg_init() is performing vmalloc() inside
write_lock_irqsave(&sg_dev_arr_lock);