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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-01-11 14:28:47 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:32:54 -0800 |
| commit | 94688e8eb453e616098cb930e5f6fed4a6ea2dfa (patch) | |
| tree | 295626ed36016d5845646287936eaee131973348 /include | |
| parent | 7d4a8be0c4b2b7ffb367929d2b352651f083806b (diff) | |
| download | lwn-94688e8eb453e616098cb930e5f6fed4a6ea2dfa.tar.gz lwn-94688e8eb453e616098cb930e5f6fed4a6ea2dfa.zip | |
mm: remove folio_pincount_ptr() and head_compound_pincount()
We can use folio->_pincount directly, since all users are guarded by tests
of compound/large.
Link: https://lkml.kernel.org/r/20230111142915.1001531-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 14 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 5 |
2 files changed, 2 insertions, 17 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 76c97cb8ee9a..6d3945207067 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1011,11 +1011,6 @@ static inline void folio_set_compound_dtor(struct folio *folio, void destroy_large_folio(struct folio *folio); -static inline int head_compound_pincount(struct page *head) -{ - return atomic_read(compound_pincount_ptr(head)); -} - static inline void set_compound_order(struct page *page, unsigned int order) { page[1].compound_order = order; @@ -1641,11 +1636,6 @@ static inline struct folio *pfn_folio(unsigned long pfn) return page_folio(pfn_to_page(pfn)); } -static inline atomic_t *folio_pincount_ptr(struct folio *folio) -{ - return &folio_page(folio, 1)->compound_pincount; -} - /** * folio_maybe_dma_pinned - Report if a folio may be pinned for DMA. * @folio: The folio. @@ -1663,7 +1653,7 @@ static inline atomic_t *folio_pincount_ptr(struct folio *folio) * expected to be able to deal gracefully with a false positive. * * For large folios, the result will be exactly correct. That's because - * we have more tracking data available: the compound_pincount is used + * we have more tracking data available: the _pincount field is used * instead of the GUP_PIN_COUNTING_BIAS scheme. * * For more information, please see Documentation/core-api/pin_user_pages.rst. @@ -1674,7 +1664,7 @@ static inline atomic_t *folio_pincount_ptr(struct folio *folio) static inline bool folio_maybe_dma_pinned(struct folio *folio) { if (folio_test_large(folio)) - return atomic_read(folio_pincount_ptr(folio)) > 0; + return atomic_read(&folio->_pincount) > 0; /* * folio_ref_count() is signed. If that refcount overflows, then diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 10b6eb311ede..6ff1d7db00a7 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -443,11 +443,6 @@ static inline atomic_t *subpages_mapcount_ptr(struct page *page) return &page[1].subpages_mapcount; } -static inline atomic_t *compound_pincount_ptr(struct page *page) -{ - return &page[1].compound_pincount; -} - /* * Used for sizing the vmemmap region on some architectures */ |