void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd) { unsigned long flags; pmd_t *pmd; pgtable_t pte; if (!pgd) return; /* pgd is always present and good */ pmd = pmd_off(pgd + pgd_index(fcse_va_to_mva(mm, 0)), 0); if (pmd_none(*pmd)) goto free; if (pmd_bad(*pmd)) { pmd_ERROR(*pmd); pmd_clear(pmd); goto free; } pte = pmd_pgtable(*pmd); pmd_clear(pmd); pte_free(mm, pte); pmd_free(mm, pmd); free: pgd_list_lock(flags); pgd_list_del(pgd); pgd_list_unlock(flags); free_pages((unsigned long) pgd, 2); }
void pgd_free(struct mm_struct *mm, pgd_t *pgd_base) { unsigned long flags; pgd_t *pgd; pud_t *pud; pmd_t *pmd; pgtable_t pte; if (!pgd_base) return; pgd = pgd_base + pgd_index(0); if (pgd_none_or_clear_bad(pgd)) goto no_pgd; pud = pud_offset(pgd + pgd_index(fcse_va_to_mva(mm, 0)), 0); if (pud_none_or_clear_bad(pud)) goto no_pud; pmd = pmd_offset(pud, 0); if (pmd_none_or_clear_bad(pmd)) goto no_pmd; pte = pmd_pgtable(*pmd); pmd_clear(pmd); pte_free(mm, pte); no_pmd: pud_clear(pud); pmd_free(mm, pmd); no_pud: pgd_clear(pgd); pud_free(mm, pud); no_pgd: pgd_list_lock(flags); pgd_list_del(pgd); pgd_list_unlock(flags); free_pages((unsigned long) pgd_base, 2); }