blob: 6dd78a2dc03aff1b410b982a76d048a4f2d1d7ad [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/mm.h>
#ifndef MODULE
static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
if (unlikely(mm == &init_mm))
return gfp;
return gfp | __GFP_ACCOUNT;
#else /* !MODULE */
static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
return gfp | __GFP_ACCOUNT;
#endif /* MODULE */
pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
return (pte_t *)pte_fragment_alloc(mm, 1);
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
return (pgtable_t)pte_fragment_alloc(mm, 0);
void pte_frag_destroy(void *pte_frag);
void pte_fragment_free(unsigned long *table, int kernel);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
pte_fragment_free((unsigned long *)pte, 1);
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
pte_fragment_free((unsigned long *)ptepage, 0);
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages, the allocation size will be
* (2^index_size * sizeof(pointer)) and allocations are drawn from
* the kmem_cache in PGT_CACHE(index_size).
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
#include <asm/book3s/pgalloc.h>
#include <asm/nohash/pgalloc.h>
static inline pgtable_t pmd_pgtable(pmd_t pmd)
return (pgtable_t)pmd_page_vaddr(pmd);