52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _LINUX_PGALLLC_TRACK_H
|
||
|
|
#define _LINUX_PGALLLC_TRACK_H
|
||
|
|
|
||
|
|
#if defined(CONFIG_MMU)
|
||
|
|
static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd,
|
||
|
|
unsigned long address,
|
||
|
|
pgtbl_mod_mask *mod_mask)
|
||
|
|
{
|
||
|
|
if (unlikely(pgd_none(*pgd))) {
|
||
|
|
if (__p4d_alloc(mm, pgd, address))
|
||
|
|
return NULL;
|
||
|
|
*mod_mask |= PGTBL_PGD_MODIFIED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return p4d_offset(pgd, address);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d,
|
||
|
|
unsigned long address,
|
||
|
|
pgtbl_mod_mask *mod_mask)
|
||
|
|
{
|
||
|
|
if (unlikely(p4d_none(*p4d))) {
|
||
|
|
if (__pud_alloc(mm, p4d, address))
|
||
|
|
return NULL;
|
||
|
|
*mod_mask |= PGTBL_P4D_MODIFIED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return pud_offset(p4d, address);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud,
|
||
|
|
unsigned long address,
|
||
|
|
pgtbl_mod_mask *mod_mask)
|
||
|
|
{
|
||
|
|
if (unlikely(pud_none(*pud))) {
|
||
|
|
if (__pmd_alloc(mm, pud, address))
|
||
|
|
return NULL;
|
||
|
|
*mod_mask |= PGTBL_PUD_MODIFIED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return pmd_offset(pud, address);
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_MMU */
|
||
|
|
|
||
|
|
#define pte_alloc_kernel_track(pmd, address, mask) \
|
||
|
|
((unlikely(pmd_none(*(pmd))) && \
|
||
|
|
(__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\
|
||
|
|
NULL: pte_offset_kernel(pmd, address))
|
||
|
|
|
||
|
|
#endif /* _LINUX_PGALLLC_TRACK_H */
|