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| author | James Morse <james.morse@arm.com> | 2018-08-31 18:19:43 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-09-21 14:02:45 +0300 |
| commit | 8a695a5873339c2e7c746ee51e3774fedd07d0a9 (patch) | |
| tree | d1ed0a79656a81836bebcd49ba116c4f62e9a215 /arch/arm64/include/asm/page.h | |
| parent | 21f84796177443695680180a8493a9e20d254d5e (diff) | |
| download | linux-8a695a5873339c2e7c746ee51e3774fedd07d0a9.tar.xz | |
arm64: Kconfig: Remove ARCH_HAS_HOLES_MEMORYMODEL
include/linux/mmzone.h describes ARCH_HAS_HOLES_MEMORYMODEL as
relevant when parts the memmap have been free()d. This would
happen on systems where memory is smaller than a sparsemem-section,
and the extra struct pages are expensive. pfn_valid() on these
systems returns true for the whole sparsemem-section, so an extra
memmap_valid_within() check is needed.
On arm64 we have nomap memory, so always provide pfn_valid() to test
for nomap pages. This means ARCH_HAS_HOLES_MEMORYMODEL's extra checks
are already rolled up into pfn_valid().
Remove it.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/page.h')
| -rw-r--r-- | arch/arm64/include/asm/page.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 60d02c81a3a2..c88a3cb117a1 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -37,9 +37,7 @@ extern void clear_page(void *to); typedef struct page *pgtable_t; -#ifdef CONFIG_HAVE_ARCH_PFN_VALID extern int pfn_valid(unsigned long); -#endif #include <asm/memory.h> |