[PATCH V14 0/4] mm/sparse-vmemmap: Generalise helpers and enable for LoongArch

From: Huacai Chen
Date: Thu Oct 27 2022 - 08:55:06 EST


This series is in order to enable sparse-vmemmap for LoongArch. But
LoongArch cannot use generic helpers directly because MIPS&LoongArch
need to call pgd_init()/pud_init()/pmd_init() when populating page
tables. So we adjust the prototypes of p?d_init() to make generic
helpers can call them, then enable sparse-vmemmap with generic helpers,
and to be further, generalise vmemmap_populate_hugepages() for ARM64,
X86 and LoongArch.

V1 -> V2:
Split ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP to a separate patch.

V2 -> V3:
1, Change the Signed-off-by order of author and committer;
2, Update commit message about the build error on LoongArch.

V3 -> V4:
Change pmd to pmdp for ARM64 for consistency.

V4 -> V5:
Add a detailed comment for no-fallback in the altmap case.

V5 -> V6:
1, Fix build error for NIOS2;
2, Fix build error for allnoconfig;
3, Update comment for no-fallback in the altmap case.

V6 -> V7:
Fix build warnings of "no previous prototype".

V7 -> V8:
Fix build error for MIPS pud_init().

V8 -> V9:
Remove redundant #include to avoid build error with latest upstream
kernel.

V9 -> V10:
Fix build error due to VMEMMAP changes in 6.0-rc1.

V10 -> V11:
Adjust context due to ARM64 changes in 6.1-rc1.

V11 -> V12:
1, Fix build error for !SPARSEMEM;
2, Simplify pagetable_init() for MIPS32.

V12 -> V13:
1, Add Acked-by and Reviewed-by tags;
2, Update commit message for the 4th patch.

V13 -> V14:
Remove the static_key.h inclusion in the 4th patch.

Huacai Chen and Feiyang Chen(4):
MIPS&LoongArch&NIOS2: Adjust prototypes of p?d_init().
LoongArch: Add sparse memory vmemmap support.
mm/sparse-vmemmap: Generalise vmemmap_populate_hugepages().
LoongArch: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP.

Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
---
arch/arm64/mm/mmu.c | 53 ++++++--------------
arch/loongarch/Kconfig | 2 +
arch/loongarch/include/asm/pgalloc.h | 13 +----
arch/loongarch/include/asm/pgtable.h | 13 +++--
arch/loongarch/include/asm/sparsemem.h | 8 +++
arch/loongarch/kernel/numa.c | 4 +-
arch/loongarch/mm/init.c | 44 +++++++++++++++-
arch/loongarch/mm/pgtable.c | 23 +++++----
arch/mips/include/asm/pgalloc.h | 8 +--
arch/mips/include/asm/pgtable-64.h | 8 +--
arch/mips/kvm/mmu.c | 3 +-
arch/mips/mm/pgtable-32.c | 10 ++--
arch/mips/mm/pgtable-64.c | 18 ++++---
arch/mips/mm/pgtable.c | 2 +-
arch/x86/mm/init_64.c | 92 ++++++++++++----------------------
include/linux/mm.h | 8 +++
include/linux/page-flags.h | 1 +
mm/sparse-vmemmap.c | 64 +++++++++++++++++++++++
18 files changed, 222 insertions(+), 152 deletions(-)
--
2.27.0