The patch titled
Subject: arm64: define only {pud/pmd}_{set/clear}_huge when usefull
has been added to the -mm tree. Its filename is
arm64-define-only-pud-pmd_set-clear_huge-when-usefull.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/arm64-define-only-pud-pmd_set-clear_huge-when-usefull.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/arm64-define-only-pud-pmd_set-clear_huge-when-usefull.patch
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------------------------------------------------------
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: arm64: define only {pud/pmd}_{set/clear}_huge when usefull
When PUD and/or PMD are folded, those functions are useless
and we now have a stub in linux/pgtable.h
Link: https://lkml.kernel.org/r/73ec95f40cafbbb69bdfb43a7f53876fd845b0ce.1620990479.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/mmu.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
--- a/arch/arm64/mm/mmu.c~arm64-define-only-pud-pmd_set-clear_huge-when-usefull
+++ a/arch/arm64/mm/mmu.c
@@ -1337,6 +1337,7 @@ void *__init fixmap_remap_fdt(phys_addr_
return dt_virt;
}
+#if CONFIG_PGTABLE_LEVELS > 3
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));
@@ -1351,6 +1352,16 @@ int pud_set_huge(pud_t *pudp, phys_addr_
return 1;
}
+int pud_clear_huge(pud_t *pudp)
+{
+ if (!pud_sect(READ_ONCE(*pudp)))
+ return 0;
+ pud_clear(pudp);
+ return 1;
+}
+#endif
+
+#if CONFIG_PGTABLE_LEVELS > 2
int pmd_set_huge(pmd_t *pmdp, phys_addr_t phys, pgprot_t prot)
{
pmd_t new_pmd = pfn_pmd(__phys_to_pfn(phys), mk_pmd_sect_prot(prot));
@@ -1365,14 +1376,6 @@ int pmd_set_huge(pmd_t *pmdp, phys_addr_
return 1;
}
-int pud_clear_huge(pud_t *pudp)
-{
- if (!pud_sect(READ_ONCE(*pudp)))
- return 0;
- pud_clear(pudp);
- return 1;
-}
-
int pmd_clear_huge(pmd_t *pmdp)
{
if (!pmd_sect(READ_ONCE(*pmdp)))
@@ -1380,6 +1383,7 @@ int pmd_clear_huge(pmd_t *pmdp)
pmd_clear(pmdp);
return 1;
}
+#endif
int pmd_free_pte_page(pmd_t *pmdp, unsigned long addr)
{
_
Patches currently in -mm which might be from christophe.leroy@xxxxxxxxxx are
mm-ioremap-fix-iomap_max_page_shift.patch
mm-hugetlb-change-parameters-of-arch_make_huge_pte.patch
mm-pgtable-add-stubs-for-pmd-pub_set-clear_huge.patch
mm-pgtable-add-stubs-for-pmd-pub_set-clear_huge-fix-2.patch
mm-vmalloc-enable-mapping-of-huge-pages-at-pte-level-in-vmap.patch
mm-vmalloc-enable-mapping-of-huge-pages-at-pte-level-in-vmalloc.patch
powerpc-8xx-add-support-for-huge-pages-on-vmap-and-vmalloc.patch
arm64-define-only-pud-pmd_set-clear_huge-when-usefull.patch
