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SubjectRe: Why is current->mm==0 ?
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> The problem occurs, when we try to get the physical addresses of the
> buffer pages. The "mm" field of _all_ task_structs is zero, which gives
> an oops in pgd_offset. =:-/ My testroutine:

That normally means you compiled against mismatched headers. The kernel
task struct changed size in 2.2.13 ..

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