Can someone elaborate on why it's bad to refer to tsk directly below (this
is a 2.4.5 change in x86) and why it's needed on x86 and not other archs..
What should I do for an arch that does not have a "cr3" machine register
to check with ?
/BW
vmalloc_fault:
{
/*
* 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);
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