Hi!
> This patch adds support for page table management.
>
> Signed-off-by: Ley Foon Tan <lftan@xxxxxxxxxx>
> +/*
> + * Initialize a new pgd / pmd table with invalid pointers.
> + */
> +static void pgd_init(pgd_t *pgd)
> +{
> + unsigned long *p = (unsigned long *) pgd;
> + int i;
> +
> + for (i = 0; i < USER_PTRS_PER_PGD; i += 8) {
> + p[i + 0] = (unsigned long) invalid_pte_table;
> + p[i + 1] = (unsigned long) invalid_pte_table;
> + p[i + 2] = (unsigned long) invalid_pte_table;
> + p[i + 3] = (unsigned long) invalid_pte_table;
> + p[i + 4] = (unsigned long) invalid_pte_table;
> + p[i + 5] = (unsigned long) invalid_pte_table;
> + p[i + 6] = (unsigned long) invalid_pte_table;
> + p[i + 7] = (unsigned long) invalid_pte_table;
> + }
Umm. Manual loop unrolling. Does it really improve performance? Is the
code hot enough to warrant the uglyness?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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