Thread (108 messages) 108 messages, 3 authors, 2021-05-06
STALE1874d
Revisions (3)
  1. v9 current
  2. v13 [diff vs current]
  3. v14 [diff vs current]

[PATCH v9 47/96] mm: Add arch_make_folio_accessible

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: 2021-05-05 16:06:45
Also in: linux-fsdevel, lkml
Subsystem: memory management - core, memory management - page allocator, the rest · Maintainers: Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds

As a default implementation, call arch_make_page_accessible n times.
If an architecture can do better, it can override this.

Also move the default implementation of arch_make_page_accessible()
from gfp.h to mm.h.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/gfp.h |  6 ------
 include/linux/mm.h  | 21 +++++++++++++++++++++
 2 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 11da8af06704..a503d928e684 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -508,12 +508,6 @@ static inline void arch_free_page(struct page *page, int order) { }
 #ifndef HAVE_ARCH_ALLOC_PAGE
 static inline void arch_alloc_page(struct page *page, int order) { }
 #endif
-#ifndef HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
-static inline int arch_make_page_accessible(struct page *page)
-{
-	return 0;
-}
-#endif
 
 struct page *__alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
 		nodemask_t *nodemask);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6bfc43309e4b..75279db82040 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1725,6 +1725,27 @@ static inline size_t folio_size(struct folio *folio)
 	return PAGE_SIZE << folio_order(folio);
 }
 
+#ifndef HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
+static inline int arch_make_page_accessible(struct page *page)
+{
+	return 0;
+}
+#endif
+
+#ifndef HAVE_ARCH_MAKE_FOLIO_ACCESSIBLE
+static inline int arch_make_folio_accessible(struct folio *folio)
+{
+	int ret, i;
+	for (i = 0; i < folio_nr_pages(folio); i++) {
+		ret = arch_make_page_accessible(folio_page(folio, i));
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+#endif
+
 /*
  * Some inline functions in vmstat.h depend on page_zone()
  */
-- 
2.30.2

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