diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 44ecb2f90db4..550dbba92521 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -1158,6 +1158,12 @@ static inline bool is_zone_device_page(const struct page *page) return page_zonenum(page) == ZONE_DEVICE; } +static inline struct dev_pagemap *page_pgmap(const struct page *page) +{ + VM_WARN_ON_ONCE_PAGE(!is_zone_device_page(page), page); + return page_folio(page)->pgmap; +} + /* * Consecutive zone device pages should not be merged into the same sgl * or bvec segment with other types of pages or if they belong to different @@ -1173,7 +1179,7 @@ static inline bool zone_device_pages_have_same_pgmap(const struct page *a, return false; if (!is_zone_device_page(a)) return true; - return a->pgmap == b->pgmap; + return page_pgmap(a) == page_pgmap(b); } extern void memmap_init_zone_device(struct zone *, unsigned long, @@ -1188,6 +1194,10 @@ static inline bool zone_device_pages_have_same_pgmap(const struct page *a, { return true; } +static inline struct dev_pagemap *page_pgmap(const struct page *page) +{ + return NULL; +} #endif static inline bool folio_is_zone_device(const struct folio *folio) |