Commit b424de33 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add arch_make_folio_accessible() 



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: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent 53c36de0

include/linux/gfp.h

+0 −6
Original line number Diff line number Diff line
@@ -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);

include/linux/mm.h

+23 −0
Original line number Diff line number Diff line
@@ -1734,6 +1734,29 @@ 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;

	long i, nr = folio_nr_pages(folio);



	for (i = 0; i < nr; 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()

 */