From: Nicholas Piggin <npiggin@gmail.com>
To: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, Zefan Li <lizefan@huawei.com>,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Christoph Hellwig <hch@infradead.org>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v7 07/12] arm64: inline huge vmap supported functions
Date: Wed, 26 Aug 2020 00:57:48 +1000 [thread overview]
Message-ID: <20200825145753.529284-8-npiggin@gmail.com> (raw)
In-Reply-To: <20200825145753.529284-1-npiggin@gmail.com>
This allows unsupported levels to be constant folded away, and so
p4d_free_pud_page can be removed because it's no longer linked to.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
Ack or objection if this goes via the -mm tree?
arch/arm64/include/asm/vmalloc.h | 23 ++++++++++++++++++++---
arch/arm64/mm/mmu.c | 26 --------------------------
2 files changed, 20 insertions(+), 29 deletions(-)
diff --git a/arch/arm64/include/asm/vmalloc.h b/arch/arm64/include/asm/vmalloc.h
index 597b40405319..fc9a12d6cc1a 100644
--- a/arch/arm64/include/asm/vmalloc.h
+++ b/arch/arm64/include/asm/vmalloc.h
@@ -4,9 +4,26 @@
#include <asm/page.h>
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-bool arch_vmap_p4d_supported(pgprot_t prot);
-bool arch_vmap_pud_supported(pgprot_t prot);
-bool arch_vmap_pmd_supported(pgprot_t prot);
+static inline bool arch_vmap_p4d_supported(pgprot_t prot)
+{
+ return false;
+}
+
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+ /*
+ * Only 4k granule supports level 1 block mappings.
+ * SW table walks can't handle removal of intermediate entries.
+ */
+ return IS_ENABLED(CONFIG_ARM64_4K_PAGES) &&
+ !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
+}
+
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+ /* See arch_vmap_pud_supported() */
+ return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
+}
#endif
#endif /* _ASM_ARM64_VMALLOC_H */
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 9df7e0058c78..07093e148957 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1304,27 +1304,6 @@ void *__init fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot)
return dt_virt;
}
-bool arch_vmap_p4d_supported(pgprot_t prot)
-{
- return false;
-}
-
-bool arch_vmap_pud_supported(pgprot_t prot);
-{
- /*
- * Only 4k granule supports level 1 block mappings.
- * SW table walks can't handle removal of intermediate entries.
- */
- return IS_ENABLED(CONFIG_ARM64_4K_PAGES) &&
- !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
-}
-
-bool arch_vmap_pmd_supported(pgprot_t prot)
-{
- /* See arch_vmap_pud_supported() */
- return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
-}
-
int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
{
pud_t new_pud = pfn_pud(__phys_to_pfn(phys), mk_pud_sect_prot(prot));
@@ -1416,11 +1395,6 @@ int pud_free_pmd_page(pud_t *pudp, unsigned long addr)
return 1;
}
-int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
-{
- return 0; /* Don't attempt a block mapping */
-}
-
#ifdef CONFIG_MEMORY_HOTPLUG
static void __remove_pgd_mapping(pgd_t *pgdir, unsigned long start, u64 size)
{
--
2.23.0
next prev parent reply other threads:[~2020-08-25 14:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 14:57 [PATCH v7 00/12] huge vmalloc mappings Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 01/12] mm/vmalloc: fix vmalloc_to_page for huge vmap mappings Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 02/12] mm: apply_to_pte_range warn and fail if a large pte is encountered Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 03/12] mm/vmalloc: rename vmap_*_range vmap_pages_*_range Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 04/12] mm/ioremap: rename ioremap_*_range to vmap_*_range Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 05/12] mm: HUGE_VMAP arch support cleanup Nicholas Piggin
2020-09-11 10:36 ` Tang Yizhou
2020-09-14 1:49 ` Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 06/12] powerpc: inline huge vmap supported functions Nicholas Piggin
2020-08-26 11:59 ` Michael Ellerman
2020-08-25 14:57 ` Nicholas Piggin [this message]
2020-08-26 10:02 ` [PATCH v7 07/12] arm64: " Catalin Marinas
2020-08-25 14:57 ` [PATCH v7 08/12] x86: " Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 09/12] mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 10/12] mm/vmalloc: add vmap_range_noflush variant Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 11/12] mm/vmalloc: Hugepage vmalloc mappings Nicholas Piggin
2020-08-25 14:57 ` [PATCH v7 12/12] powerpc/64s/radix: Enable huge " Nicholas Piggin
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