[RFC PATCH 3/7] mm: add pte_to_page() helper
From: Qi Zheng <hidden>
Date: 2022-08-25 10:12:10
Also in:
lkml
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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 <redacted> --- 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) {
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2.20.1