Messages in this thread Patch in this message | | | From | Qi Zheng <> | Subject | [RFC PATCH 3/7] mm: add pte_to_page() helper | Date | Thu, 25 Aug 2022 18:10:33 +0800 |
| |
Add pte_to_page() helper similar to pmd_to_page(), which will be used to get the struct page of the PTE page table.
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> --- include/linux/pgtable.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 9745684b0cdb..c4a6bda6e965 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -86,6 +86,14 @@ static inline unsigned long pud_index(unsigned long address) #define pgd_index(a) (((a) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) #endif +#ifdef CONFIG_FREE_USER_PTE +static inline struct page *pte_to_page(pte_t *pte) +{ + unsigned long mask = ~(PTRS_PER_PTE * sizeof(pte_t) - 1); + return virt_to_page((void *)((unsigned long) pte & mask)); +} +#endif + #ifndef pte_offset_kernel static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) { -- 2.20.1
| |