[PATCH v9 44/96] mm/rmap: Add folio_mkclean
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: 2021-05-05 16:03:12
Also in:
linux-mm, lkml
Subsystem:
memory management, memory management - rmap (reverse mapping), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Lorenzo Stoakes, Linus Torvalds
Transform page_mkclean() into folio_mkclean() and add a page_mkclean() wrapper around folio_mkclean(). folio_mkclean is 15 bytes smaller than page_mkclean, but the kernel is enlarged by 33 bytes due to inlining page_folio() into each caller. This will go away once the callers are converted to use folio_mkclean(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/rmap.h | 10 ++++++---- mm/rmap.c | 12 ++++++------ 2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index def5c62c93b3..edb006bc4159 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h@@ -233,7 +233,7 @@ unsigned long page_address_in_vma(struct page *, struct vm_area_struct *); * * returns the number of cleaned PTEs. */ -int page_mkclean(struct page *); +int folio_mkclean(struct folio *); /* * called in munlock()/munmap() path to check for other vmas holding
@@ -291,12 +291,14 @@ static inline int page_referenced(struct page *page, int is_locked, #define try_to_unmap(page, refs) false -static inline int page_mkclean(struct page *page) +static inline int folio_mkclean(struct folio *folio) { return 0; } - - #endif /* CONFIG_MMU */ +static inline int page_mkclean(struct page *page) +{ + return folio_mkclean(page_folio(page)); +} #endif /* _LINUX_RMAP_H */
diff --git a/mm/rmap.c b/mm/rmap.c
index 693a610e181d..e29dbbc880d7 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c@@ -983,7 +983,7 @@ static bool invalid_mkclean_vma(struct vm_area_struct *vma, void *arg) return true; } -int page_mkclean(struct page *page) +int folio_mkclean(struct folio *folio) { int cleaned = 0; struct address_space *mapping;
@@ -993,20 +993,20 @@ int page_mkclean(struct page *page) .invalid_vma = invalid_mkclean_vma, }; - BUG_ON(!PageLocked(page)); + BUG_ON(!folio_locked(folio)); - if (!page_mapped(page)) + if (!folio_mapped(folio)) return 0; - mapping = page_mapping(page); + mapping = folio_mapping(folio); if (!mapping) return 0; - rmap_walk(page, &rwc); + rmap_walk(&folio->page, &rwc); return cleaned; } -EXPORT_SYMBOL_GPL(page_mkclean); +EXPORT_SYMBOL_GPL(folio_mkclean); /** * page_move_anon_rmap - move a page to our anon_vma
--
2.30.2