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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-03-09 21:52:08 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2017-03-23 14:09:12 +0000
commit5bd466947160d1e0517747b63216806ea768c791 (patch)
tree9d311b857d4628017e1cb90422b02dd969105a02 /arch/arm64/mm
parentc0951366d4b7e00d2f60f6daae7069b240d370c0 (diff)
downloadlinux-5bd466947160d1e0517747b63216806ea768c791.tar.bz2
arm64/mm: remove pointless map/unmap sequences when creating page tables
The routines __pud_populate and __pmd_populate only create a table entry at their respective level which refers to the next level page by its physical address, so there is no reason to map this page and then unmap it immediately after. Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/mmu.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index bc9d5eb7bfa2..85ab82f5a0bc 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -128,9 +128,7 @@ static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
phys_addr_t pte_phys;
BUG_ON(!pgtable_alloc);
pte_phys = pgtable_alloc();
- pte = pte_set_fixmap(pte_phys);
__pmd_populate(pmd, pte_phys, PMD_TYPE_TABLE);
- pte_clear_fixmap();
}
BUG_ON(pmd_bad(*pmd));
@@ -168,9 +166,7 @@ static void alloc_init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
phys_addr_t pmd_phys;
BUG_ON(!pgtable_alloc);
pmd_phys = pgtable_alloc();
- pmd = pmd_set_fixmap(pmd_phys);
__pud_populate(pud, pmd_phys, PUD_TYPE_TABLE);
- pmd_clear_fixmap();
}
BUG_ON(pud_bad(*pud));