[PATCH 1/5] mm: constify generic pte_get*()

[Pedro Falcato <pfalcato@suse.de>]

None of the helpers need write access to the PTE. Constifying the param
allows for const typesafety.

Signed-off-by: Pedro Falcato <pfalcato@suse.de>
---
 include/linux/pgtable.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 8c093c119e5a..dc418553e57a 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -490,7 +490,7 @@ 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);
 }
@@ -739,7 +739,7 @@ static inline void ptep_clear(struct mm_struct *mm, unsigned long addr,
  * present bit set *unless* it is 'l'. Because get_user_pages_fast() only
  * operates on present ptes we're safe.
  */
-static inline pte_t ptep_get_lockless(pte_t *ptep)
+static inline pte_t ptep_get_lockless(const pte_t *ptep)
 {
 	pte_t pte;
 
@@ -777,7 +777,7 @@ static inline pmd_t pmdp_get_lockless(pmd_t *pmdp)
  * We require that the PTE can be read atomically.
  */
 #ifndef ptep_get_lockless
-static inline pte_t ptep_get_lockless(pte_t *ptep)
+static inline pte_t ptep_get_lockless(const pte_t *ptep)
 {
 	return ptep_get(ptep);
 }
-- 
2.55.0