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| 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/ioremap.c | |
| parent | 31168f033e3751d1c9245d9ee847d775af16dcd6 (diff) | |
| download | linux-stable-2bee1b58484f036e3e2dc657e524d095d0d332b3.tar.gz linux-stable-2bee1b58484f036e3e2dc657e524d095d0d332b3.tar.bz2 linux-stable-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/ioremap.c')
| -rw-r--r-- | arch/mips/mm/ioremap.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c index 1601d90b087b..8317f337a86e 100644 --- a/arch/mips/mm/ioremap.c +++ b/arch/mips/mm/ioremap.c @@ -78,11 +78,15 @@ static int remap_area_pages(unsigned long address, phys_addr_t phys_addr, flush_cache_all(); BUG_ON(address >= end); do { + p4d_t *p4d; pud_t *pud; pmd_t *pmd; error = -ENOMEM; - pud = pud_alloc(&init_mm, dir, address); + p4d = p4d_alloc(&init_mm, dir, address); + if (!p4d) + break; + pud = pud_alloc(&init_mm, p4d, address); if (!pud) break; pmd = pmd_alloc(&init_mm, pud, address); |