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SubjectRe: [STUPID] Best looking code to transfer to a t-shirt
Maciej Soltysiak wrote:

>Hi,
>
>I am in a t-shirt transfering frenzy and was wondering which part of the
>kernel code it would be best to have on my t-shirt.
>I was looking at my favourite: netfilter code, but it is to clean, short
>and simple functions, no tons of pointers, no mallocs, no hex numbers, too
>many defines used. I was looking for something terribly complicated and
>looking awesome to the eye.
>
>
arch/i386/mm/fault.c

/*
* Synchronize this task's top level page-table
* with the 'reference' page table.
*
* Do _not_ use "tsk" here. We might be inside
* an interrupt in the middle of a task switch..
*/
int offset = __pgd_offset(address);
pgd_t *pgd, *pgd_k;
pmd_t *pmd, *pmd_k;
pte_t *pte_k;

asm("movl %%cr3,%0":"=r" (pgd));
pgd = offset + (pgd_t *)__va(pgd);
pgd_k = init_mm.pgd + offset;

if (!pgd_present(*pgd_k))
goto no_context;
set_pgd(pgd, *pgd_k);

pmd = pmd_offset(pgd, address);
pmd_k = pmd_offset(pgd_k, address);
if (!pmd_present(*pmd_k))
goto no_context;
set_pmd(pmd, *pmd_k);

pte_k = pte_offset_kernel(pmd_k, address);
if (!pte_present(*pte_k))
goto no_context;
return;
}

--

Álvaro Lopes
---------------------
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