Generic MM default pxdp_get() helpers fetch the values contained in pgtable entries via READ_ONCE() without modifying them. Just make their arguments explicitly 'const' for some additional protection. Cc: Andrew Morton Cc: David Hildenbrand Cc: Lorenzo Stoakes Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Suggested-by: David Hildenbrand Signed-off-by: Anshuman Khandual --- This patch applies on v7.2-rc3 and builds on many platforms. Some earlier discussion could be found here. Platorm implementations for these helpers could convert into these "const" format later if required. https://lore.kernel.org/all/yjqldpl7il6uqfoqrszaopchqthhlffssprmlqjkljvpkbpwkt@zetb5hyvllsl/ include/linux/pgtable.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 2981e386da7b3..f09a91ff5833b 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -490,35 +490,35 @@ static inline int pudp_set_access_flags(struct vm_area_struct *vma, #endif #ifndef ptep_get -static inline pte_t ptep_get(pte_t *ptep) +static inline pte_t ptep_get(const pte_t *ptep) { return READ_ONCE(*ptep); } #endif #ifndef pmdp_get -static inline pmd_t pmdp_get(pmd_t *pmdp) +static inline pmd_t pmdp_get(const pmd_t *pmdp) { return READ_ONCE(*pmdp); } #endif #ifndef pudp_get -static inline pud_t pudp_get(pud_t *pudp) +static inline pud_t pudp_get(const pud_t *pudp) { return READ_ONCE(*pudp); } #endif #ifndef p4dp_get -static inline p4d_t p4dp_get(p4d_t *p4dp) +static inline p4d_t p4dp_get(const p4d_t *p4dp) { return READ_ONCE(*p4dp); } #endif #ifndef pgdp_get -static inline pgd_t pgdp_get(pgd_t *pgdp) +static inline pgd_t pgdp_get(const pgd_t *pgdp) { return READ_ONCE(*pgdp); } -- 2.43.0