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2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a 
 kernel/arch/powerpc/include/asm/nohash/32/pgalloc.h
....@@ -6,42 +6,6 @@
66 #include <linux/slab.h>
77 
88 /*
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- * Functions that deal with pagetables that could be at any level of
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- * the table need to be passed an "index_size" so they know how to
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- * handle allocation.  For PTE pages (which are linked to a struct
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- * page for now, and drawn from the main get_free_pages() pool), the
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- * allocation size will be (2^index_size * sizeof(pointer)) and
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- * allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
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- *
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- * The maximum index size needs to be big enough to allow any
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- * pagetable sizes we need, but small enough to fit in the low bits of
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- * any page table pointer.  In other words all pagetables, even tiny
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- * ones, must be aligned to allow at least enough low 0 bits to
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- * contain this value.  This value is also used as a mask, so it must
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- * be one less than a power of two.
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- */
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-#define MAX_PGTABLE_INDEX_SIZE	0xf
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-
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-extern void __bad_pte(pmd_t *pmd);
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-
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-extern struct kmem_cache *pgtable_cache[];
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-#define PGT_CACHE(shift) ({				\
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-			BUG_ON(!(shift));		\
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-			pgtable_cache[(shift) - 1];	\
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-		})
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-
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-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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-{
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-	return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
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-			pgtable_gfp_flags(mm, GFP_KERNEL));
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-}
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-
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-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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-{
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-	kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
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-}
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-
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-/*
459  * We don't have any real pmd's, and this code never triggers because
4610  * the pgd will always be present..
4711  */
....@@ -50,96 +14,22 @@
5014 #define __pmd_free_tlb(tlb,x,a)		do { } while (0)
5115 /* #define pgd_populate(mm, pmd, pte)      BUG() */
5216 
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-#ifndef CONFIG_BOOKE
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-
5517 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
5618 				       pte_t *pte)
5719 {
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-	*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
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+	if (IS_ENABLED(CONFIG_BOOKE))
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+		*pmdp = __pmd((unsigned long)pte | _PMD_PRESENT);
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+	else
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+		*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
5924 }
6025 
6126 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
6227 				pgtable_t pte_page)
6328 {
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-	*pmdp = __pmd((page_to_pfn(pte_page) << PAGE_SHIFT) | _PMD_USER |
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-		      _PMD_PRESENT);
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+	if (IS_ENABLED(CONFIG_BOOKE))
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+		*pmdp = __pmd((unsigned long)pte_page | _PMD_PRESENT);
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+	else
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+		*pmdp = __pmd(__pa(pte_page) | _PMD_USER | _PMD_PRESENT);
6633 }
6734 
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-#define pmd_pgtable(pmd) pmd_page(pmd)
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-#else
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-
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-static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
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-				       pte_t *pte)
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-{
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-	*pmdp = __pmd((unsigned long)pte | _PMD_PRESENT);
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-}
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-
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-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
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-				pgtable_t pte_page)
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-{
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-	*pmdp = __pmd((unsigned long)lowmem_page_address(pte_page) | _PMD_PRESENT);
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-}
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-
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-#define pmd_pgtable(pmd) pmd_page(pmd)
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-#endif
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-
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-extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
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-extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
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-
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-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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-{
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-	free_page((unsigned long)pte);
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-}
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-
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-static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
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-{
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-	pgtable_page_dtor(ptepage);
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-	__free_page(ptepage);
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-}
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-
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-static inline void pgtable_free(void *table, unsigned index_size)
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-{
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-	if (!index_size) {
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-		pgtable_page_dtor(virt_to_page(table));
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-		free_page((unsigned long)table);
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-	} else {
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-		BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
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-		kmem_cache_free(PGT_CACHE(index_size), table);
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-	}
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-}
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-
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-#define check_pgt_cache()	do { } while (0)
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-#define get_hugepd_cache_index(x)	(x)
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-
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-#ifdef CONFIG_SMP
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-static inline void pgtable_free_tlb(struct mmu_gather *tlb,
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-				    void *table, int shift)
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-{
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-	unsigned long pgf = (unsigned long)table;
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-	BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
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-	pgf |= shift;
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-	tlb_remove_table(tlb, (void *)pgf);
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-}
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-
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-static inline void __tlb_remove_table(void *_table)
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-{
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-	void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
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-	unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
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-
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-	pgtable_free(table, shift);
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-}
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-#else
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-static inline void pgtable_free_tlb(struct mmu_gather *tlb,
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-				    void *table, int shift)
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-{
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-	pgtable_free(table, shift);
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-}
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-#endif
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-
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-static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
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-				  unsigned long address)
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-{
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-	tlb_flush_pgtable(tlb, address);
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-	pgtable_free_tlb(tlb, page_address(table), 0);
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-}
14535 #endif /* _ASM_POWERPC_PGALLOC_32_H */