Just like regular pages, page directories need to observe the following order:
1) unhook 2) TLB invalidate 3) free to ensure it is safe against concurrent accesses. Since IA64 has page based P[UM]Ds, no software walkers and IPI based TLB invalidation, it can use the simple tlb_remove_page() based freeer. Signed-off-by: Peter Zijlstra (Intel) <[email protected]> --- arch/ia64/include/asm/pgalloc.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) --- a/arch/ia64/include/asm/pgalloc.h +++ b/arch/ia64/include/asm/pgalloc.h @@ -50,7 +50,9 @@ static inline void pud_free(struct mm_st { free_page((unsigned long)pud); } -#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud) + +#define __pud_free_tlb(tlb, pud, address) \ + tlb_remove_table((tlb), virt_to_page(pud)) #endif /* CONFIG_PGTABLE_LEVELS == 4 */ static inline void @@ -69,7 +71,8 @@ static inline void pmd_free(struct mm_st free_page((unsigned long)pmd); } -#define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd) +#define __pmd_free_tlb(tlb, pmd, address) \ + tlb_remove_table((tlb), virt_to_page(pmd) static inline void pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte) @@ -84,6 +87,10 @@ pmd_populate_kernel(struct mm_struct *mm pmd_val(*pmd_entry) = __pa(pte); } -#define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte) +#define __pte_free_tlb(tlb, pte, address) \ +do { \ + pgtable_pte_page_dtor(pte); \ + tlb_remove_table((tlb), (pte)); \ +} while (0) #endif /* _ASM_IA64_PGALLOC_H */
