mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 12:16:45 +07:00
e584d85fb1
This bug was introduced in 2f569afd9c.
(CONFIG_HIGHPTE vs. sub-page page tables)
Signed-off-by: Chris Zankel <chris@zankel.net>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
|
|
* include/asm-xtensa/pgalloc.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Copyright (C) 2001-2007 Tensilica Inc.
|
|
*/
|
|
|
|
#ifndef _XTENSA_PGALLOC_H
|
|
#define _XTENSA_PGALLOC_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/highmem.h>
|
|
|
|
/*
|
|
* Allocating and freeing a pmd is trivial: the 1-entry pmd is
|
|
* inside the pgd, so has no extra memory associated with it.
|
|
*/
|
|
|
|
#define pmd_populate_kernel(mm, pmdp, ptep) \
|
|
(pmd_val(*(pmdp)) = ((unsigned long)ptep))
|
|
#define pmd_populate(mm, pmdp, page) \
|
|
(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
static inline pgd_t*
|
|
pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
|
|
}
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
free_page((unsigned long)pgd);
|
|
}
|
|
|
|
/* Use a slab cache for the pte pages (see also sparc64 implementation) */
|
|
|
|
extern struct kmem_cache *pgtable_cache;
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long addr)
|
|
{
|
|
struct page *page;
|
|
|
|
page = virt_to_page(pte_alloc_one_kernel(mm, addr));
|
|
pgtable_page_ctor(page);
|
|
return page;
|
|
}
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
kmem_cache_free(pgtable_cache, pte);
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
|
|
{
|
|
pgtable_page_dtor(pte);
|
|
kmem_cache_free(pgtable_cache, page_address(pte));
|
|
}
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _XTENSA_PGALLOC_H */
|