diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-03-26 23:28:22 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 06:56:18 +0300 |
| commit | 5beaee54a324ba1fe307e341ec825d5d099f4091 (patch) | |
| tree | ec2b731c12b16589ccad98101de58594805006f2 /include | |
| parent | 4d30eac3744d195ac43fbc36117d1e5de447b1ca (diff) | |
| download | linux-5beaee54a324ba1fe307e341ec825d5d099f4091.tar.xz | |
mm: add is_huge_zero_folio()
This is the folio equivalent of is_huge_zero_page(). It doesn't add any
efficiency, but it does prevent the caller from passing a tail page and
getting confused when the predicate returns false.
Link: https://lkml.kernel.org/r/20240326202833.523759-3-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')
| -rw-r--r-- | include/linux/huge_mm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 1540a1481daf..600c6008262b 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -356,6 +356,11 @@ 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; +} + static inline bool is_huge_zero_pmd(pmd_t pmd) { return pmd_present(pmd) && READ_ONCE(huge_zero_pfn) == pmd_pfn(pmd); @@ -485,6 +490,11 @@ 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; +} + static inline bool is_huge_zero_pmd(pmd_t pmd) { return false; |