powerpc/book3s: Remove pgd/pud/pmd_set() interfaces

When updating page tables, we need to make sure we fill the page table
entry valid bits. We do this by or'ing in one of PGD/PUD/PMD_VAL_BITS.

The page table 'set' interfaces allow updating the raw value of page
table entries without setting the valid bits, so remove those
interfaces to avoid incorrect usage in future.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Reword commit message based on mailing list discussion]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/book3s/64/pgalloc.h

@@ -111,7 +111,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 
 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
 {
-	pgd_set(pgd, __pgtable_ptr_val(pud) | PGD_VAL_BITS);
+	*pgd =  __pgd(__pgtable_ptr_val(pud) | PGD_VAL_BITS);
 }
 
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
@@ -138,7 +138,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 
 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 {
-	pud_set(pud, __pgtable_ptr_val(pmd) | PUD_VAL_BITS);
+	*pud = __pud(__pgtable_ptr_val(pmd) | PUD_VAL_BITS);
 }
 
 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
@@ -176,13 +176,13 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
 				       pte_t *pte)
 {
-	pmd_set(pmd, __pgtable_ptr_val(pte) | PMD_VAL_BITS);
+	*pmd = __pmd(__pgtable_ptr_val(pte) | PMD_VAL_BITS);
 }
 
 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 				pgtable_t pte_page)
 {
-	pmd_set(pmd, __pgtable_ptr_val(pte_page) | PMD_VAL_BITS);
+	*pmd = __pmd(__pgtable_ptr_val(pte_page) | PMD_VAL_BITS);
 }
 
 static inline pgtable_t pmd_pgtable(pmd_t pmd)

arch/powerpc/include/asm/book3s/64/pgtable.h

@@ -851,11 +851,6 @@ static inline bool pte_ci(pte_t pte)
 	return false;
 }
 
-static inline void pmd_set(pmd_t *pmdp, unsigned long val)
-{
-	*pmdp = __pmd(val);
-}
-
 static inline void pmd_clear(pmd_t *pmdp)
 {
 	*pmdp = __pmd(0);
@@ -887,11 +882,6 @@ static inline int pmd_bad(pmd_t pmd)
 	return hash__pmd_bad(pmd);
 }
 
-static inline void pud_set(pud_t *pudp, unsigned long val)
-{
-	*pudp = __pud(val);
-}
-
 static inline void pud_clear(pud_t *pudp)
 {
 	*pudp = __pud(0);
@@ -934,10 +924,6 @@ static inline bool pud_access_permitted(pud_t pud, bool write)
 }
 
 #define pgd_write(pgd)		pte_write(pgd_pte(pgd))
-static inline void pgd_set(pgd_t *pgdp, unsigned long val)
-{
-	*pgdp = __pgd(val);
-}
 
 static inline void pgd_clear(pgd_t *pgdp)
 {