[PATCH v14 055/138] mm: Add arch_make_folio_accessible()

Matthew Wilcox (Oracle)
2021-07-15T04:22:51Z

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 55b2ec1f965a..dc5ff40608ce 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -520,12 +520,6 @@ 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 89daae93aa9b..deb0f5efaa65 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1732,6 +1732,27 @@ 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