https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 2dde18cd1d8fac735875f2e4987f11817cc0bc2c authored by Linus Torvalds on 27 August 2023, 21:49:51 UTC
Linux 6.5
Linux 6.5
Tip revision: 2dde18c
mcf_pgalloc.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef M68K_MCF_PGALLOC_H
#define M68K_MCF_PGALLOC_H
#include <asm/tlb.h>
#include <asm/tlbflush.h>
extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long) pte);
}
extern const char bad_pmd_string[];
extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
unsigned long page = __get_free_page(GFP_DMA);
if (!page)
return NULL;
memset((void *)page, 0, PAGE_SIZE);
return (pte_t *) (page);
}
extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
{
return (pmd_t *) pgd;
}
#define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
#define pmd_populate_kernel pmd_populate
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
unsigned long address)
{
struct page *page = virt_to_page(pgtable);
pgtable_pte_page_dtor(page);
__free_page(page);
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
struct page *page = alloc_pages(GFP_DMA, 0);
pte_t *pte;
if (!page)
return NULL;
if (!pgtable_pte_page_ctor(page)) {
__free_page(page);
return NULL;
}
pte = page_address(page);
clear_page(pte);
return pte;
}
static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
{
struct page *page = virt_to_page(pgtable);
pgtable_pte_page_dtor(page);
__free_page(page);
}
/*
* In our implementation, each pgd entry contains 1 pmd that is never allocated
* or freed. pgd_present is always 1, so this should never be called. -NL
*/
#define pmd_free(mm, pmd) BUG()
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *new_pgd;
new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
if (!new_pgd)
return NULL;
memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
return new_pgd;
}
#endif /* M68K_MCF_PGALLOC_H */