Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Matt Fleming |
221 |
85.33% |
2 |
33.33% |
| Matthew Wilcox |
18 |
6.95% |
1 |
16.67% |
| Paul Mundt |
16 |
6.18% |
1 |
16.67% |
| Tejun Heo |
3 |
1.16% |
1 |
16.67% |
| Greg Kroah-Hartman |
1 |
0.39% |
1 |
16.67% |
| Total |
259 |
|
6 |
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/slab.h>
static struct kmem_cache *pgd_cachep;
#if PAGETABLE_LEVELS > 2
static struct kmem_cache *pmd_cachep;
#endif
void pgd_ctor(void *x)
{
pgd_t *pgd = x;
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
memcpy(pgd + USER_PTRS_PER_PGD,
swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
void pgtable_cache_init(void)
{
pgd_cachep = kmem_cache_create("pgd_cache",
PTRS_PER_PGD * (1<<PTE_MAGNITUDE),
PAGE_SIZE, SLAB_PANIC, pgd_ctor);
#if PAGETABLE_LEVELS > 2
pmd_cachep = kmem_cache_create("pmd_cache",
PTRS_PER_PMD * (1<<PTE_MAGNITUDE),
PAGE_SIZE, SLAB_PANIC, NULL);
#endif
}
pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(pgd_cachep, GFP_KERNEL);
}
void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
kmem_cache_free(pgd_cachep, pgd);
}
#if PAGETABLE_LEVELS > 2
void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
set_pud(pud, __pud((unsigned long)pmd));
}
pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
return kmem_cache_alloc(pmd_cachep, GFP_KERNEL | __GFP_ZERO);
}
void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
kmem_cache_free(pmd_cachep, pmd);
}
#endif /* PAGETABLE_LEVELS > 2 */