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mm: Add arch_make_folio_accessible()

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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>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-04-24 14:50:36 -04:00
parent 53c36de070
commit b424de33c4
2 changed files with 23 additions and 6 deletions
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6
include/linux/gfp.h
View File

@ -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);

23
include/linux/mm.h
View File

@ -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()
*/