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 1kVflGvb 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folios > throughout to avoid accesses to page->index and page->mapping. > > Signed-off-by: Matthew Wilcox (Oracle) > --- > fs/dax.c | 53 +++++++++++++++++++++++++++-------------------------- > 1 file changed, 27 insertions(+), 26 deletions(-) > > diff --git a/fs/dax.c b/fs/dax.c > index 21b47402b3dc..972febc6fb9d 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -320,38 +320,39 @@ static unsigned long dax_end_pfn(void *entry) > for (pfn = dax_to_pfn(entry); \ > pfn < dax_end_pfn(entry); pfn++) > > -static inline bool dax_page_is_shared(struct page *page) > +static inline bool dax_folio_is_shared(struct folio *folio) > { > - return page->mapping == PAGE_MAPPING_DAX_SHARED; > + return folio->mapping == PAGE_MAPPING_DAX_SHARED; > } > > /* > - * Set the page->mapping with PAGE_MAPPING_DAX_SHARED flag, increase the > + * Set the folio->mapping with PAGE_MAPPING_DAX_SHARED flag, increase the > * refcount. > */ > -static inline void dax_page_share_get(struct page *page) > +static inline void dax_folio_share_get(struct folio *folio) > { > - if (page->mapping != PAGE_MAPPING_DAX_SHARED) { > + if (folio->mapping != PAGE_MAPPING_DAX_SHARED) { > /* > * Reset the index if the page was already mapped > * regularly before. > */ > - if (page->mapping) > - page->share = 1; > - page->mapping = PAGE_MAPPING_DAX_SHARED; > + if (folio->mapping) > + folio->page.share = 1; > + folio->mapping = PAGE_MAPPING_DAX_SHARED; > } > - page->share++; > + folio->page.share++; > } > > -static inline unsigned long dax_page_share_put(struct page *page) > +static inline unsigned long dax_folio_share_put(struct folio *folio) > { > - return --page->share; > + return --folio->page.share; > } > > /* > - * When it is called in dax_insert_entry(), the shared flag will indicate that > - * whether this entry is shared by multiple files. If so, set the page->mapping > - * PAGE_MAPPING_DAX_SHARED, and use page->share as refcount. > + * When it is called in dax_insert_entry(), the shared flag will indicate > + * that whether this entry is shared by multiple files. If so, set > + * the folio->mapping PAGE_MAPPING_DAX_SHARED, and use page->share > + * as refcount. > */ > static void dax_associate_entry(void *entry, struct address_space *mapping, > struct vm_area_struct *vma, unsigned long address, bool shared) > @@ -364,14 +365,14 @@ static void dax_associate_entry(void *entry, struct address_space *mapping, > > index = linear_page_index(vma, address & ~(size - 1)); > for_each_mapped_pfn(entry, pfn) { > - struct page *page = pfn_to_page(pfn); > + struct folio *folio = pfn_folio(pfn); > > if (shared) { > - dax_page_share_get(page); > + dax_folio_share_get(folio); > } else { > - WARN_ON_ONCE(page->mapping); > - page->mapping = mapping; > - page->index = index + i++; > + WARN_ON_ONCE(folio->mapping); > + folio->mapping = mapping; > + folio->index = index + i++; > } > } > } > @@ -385,17 +386,17 @@ static void dax_disassociate_entry(void *entry, struct address_space *mapping, > return; > > for_each_mapped_pfn(entry, pfn) { > - struct page *page = pfn_to_page(pfn); > + struct folio *folio = pfn_folio(pfn); > > - WARN_ON_ONCE(trunc && page_ref_count(page) > 1); > - if (dax_page_is_shared(page)) { > + WARN_ON_ONCE(trunc && folio_ref_count(folio) > 1); > + if (dax_folio_is_shared(folio)) { > /* keep the shared flag if this page is still shared */ > - if (dax_page_share_put(page) > 0) > + if (dax_folio_share_put(folio) > 0) > continue; > } else > - WARN_ON_ONCE(page->mapping && page->mapping != mapping); > - page->mapping = NULL; > - page->index = 0; > + WARN_ON_ONCE(folio->mapping && folio->mapping != mapping); > + folio->mapping = NULL; > + folio->index = 0; > } > } > Looks good. Reviewed-by: Jane Chu -jane