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Subject[PATCH] arm64/mm: Drop use_1G_block()
Date
pud_sect_supported() already checks for PUD level block mapping support i.e
on ARM64_4K_PAGES config. Hence pud_sect_supported(), along with some other
required alignment checks can help completely drop use_1G_block().

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
This applies on v5.17-rc4

arch/arm64/mm/mmu.c | 15 ++-------------
1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index acfae9b41cc8..5a7954c9e6ec 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -294,18 +294,6 @@ static void alloc_init_cont_pmd(pud_t *pudp, unsigned long addr,
} while (addr = next, addr != end);
}

-static inline bool use_1G_block(unsigned long addr, unsigned long next,
- unsigned long phys)
-{
- if (PAGE_SHIFT != 12)
- return false;
-
- if (((addr | next | phys) & ~PUD_MASK) != 0)
- return false;
-
- return true;
-}
-
static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end,
phys_addr_t phys, pgprot_t prot,
phys_addr_t (*pgtable_alloc)(int),
@@ -338,7 +326,8 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end,
/*
* For 4K granule only, attempt to put down a 1GB block
*/
- if (use_1G_block(addr, next, phys) &&
+ if (pud_sect_supported() &&
+ ((addr | next | phys) & ~PUD_MASK) == 0 &&
(flags & NO_BLOCK_MAPPINGS) == 0) {
pud_set_huge(pudp, phys, prot);

--
2.20.1
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