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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-03-26 23:28:25 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 06:56:19 +0300 |
| commit | 5691753d73a233a97c13f7d389f15d20596d062d (patch) | |
| tree | 0614a92084ad463a434d638118097bab426ef7ee /include/linux/huge_mm.h | |
| parent | b002a7b0a58aceaed0e3c5dd80d6f549df6490b2 (diff) | |
| download | linux-5691753d73a233a97c13f7d389f15d20596d062d.tar.xz | |
mm: convert huge_zero_page to huge_zero_folio
With all callers of is_huge_zero_page() converted, we can now switch the
huge_zero_page itself from being a compound page to a folio.
Link: https://lkml.kernel.org/r/20240326202833.523759-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/huge_mm.h')
| -rw-r--r-- | include/linux/huge_mm.h | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 600c6008262b..7ba59ba36354 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -348,17 +348,12 @@ struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf); -extern struct page *huge_zero_page; +extern struct folio *huge_zero_folio; extern unsigned long huge_zero_pfn; -static inline bool is_huge_zero_page(const struct page *page) -{ - return READ_ONCE(huge_zero_page) == page; -} - static inline bool is_huge_zero_folio(const struct folio *folio) { - return READ_ONCE(huge_zero_page) == &folio->page; + return READ_ONCE(huge_zero_folio) == folio; } static inline bool is_huge_zero_pmd(pmd_t pmd) @@ -371,9 +366,14 @@ static inline bool is_huge_zero_pud(pud_t pud) return false; } -struct page *mm_get_huge_zero_page(struct mm_struct *mm); +struct folio *mm_get_huge_zero_folio(struct mm_struct *mm); void mm_put_huge_zero_page(struct mm_struct *mm); +static inline struct page *mm_get_huge_zero_page(struct mm_struct *mm) +{ + return &mm_get_huge_zero_folio(mm)->page; +} + #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) static inline bool thp_migration_supported(void) @@ -485,11 +485,6 @@ static inline vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf) return 0; } -static inline bool is_huge_zero_page(const struct page *page) -{ - return false; -} - static inline bool is_huge_zero_folio(const struct folio *folio) { return false; |