diff options
| author |   Mike Rapoport <rppt@linux.ibm.com> | 2019-11-21 18:21:33 +0200 |
|---|---|---|
| committer |   Paul Burton <paulburton@kernel.org> | 2019-11-22 10:51:22 -0800 |
| commit | 2bee1b58484f036e3e2dc657e524d095d0d332b3 (patch) | |
| tree | e3ee8827fbfbafa8f3a8a3b82c7e46b5de6048a7 /arch/mips/mm/hugetlbpage.c | |
| parent | mips: drop __pXd_offset() macros that duplicate pXd_index() ones (diff) | |
| download | linux-dev-2bee1b58484f036e3e2dc657e524d095d0d332b3.tar.xz linux-dev-2bee1b58484f036e3e2dc657e524d095d0d332b3.zip | |
mips: add support for folded p4d page tables
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate, replace 5leve-fixup.h with pgtable-nop4d.h and
drop usage of __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: Mike Rapoport <rppt@kernel.org>
Diffstat (limited to 'arch/mips/mm/hugetlbpage.c')
| -rw-r--r-- | arch/mips/mm/hugetlbpage.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/mips/mm/hugetlbpage.c b/arch/mips/mm/hugetlbpage.c index cef152234312..77ffece9c270 100644 --- a/arch/mips/mm/hugetlbpage.c +++ b/arch/mips/mm/hugetlbpage.c @@ -25,11 +25,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pte_t *pte = NULL; pgd = pgd_offset(mm, addr); - pud = pud_alloc(mm, pgd, addr); + p4d = p4d_alloc(mm, pgd, addr); + pud = pud_alloc(mm, p4d, addr); if (pud) pte = (pte_t *)pmd_alloc(mm, pud, addr); @@ -40,14 +42,18 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd = NULL; pgd = pgd_offset(mm, addr); if (pgd_present(*pgd)) { - pud = pud_offset(pgd, addr); - if (pud_present(*pud)) - pmd = pmd_offset(pud, addr); + p4d = p4d_offset(pgd, addr); + if (p4d_present(*p4d)) { + pud = pud_offset(p4d, addr); + if (pud_present(*pud)) + pmd = pmd_offset(pud, addr); + } } return (pte_t *) pmd; } |