diff options
| -rw-r--r-- | include/linux/mm.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index bb793a4c8e9..26adfcc0d61 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -437,15 +437,15 @@ static inline compound_page_dtor *get_compound_page_dtor(struct page *page) /* NODE:ZONE or SECTION:ZONE is used to ID a zone for the buddy allcator */ #ifdef NODE_NOT_IN_PAGEFLAGS #define ZONEID_SHIFT (SECTIONS_SHIFT + ZONES_SHIFT) +#define ZONEID_PGOFF ((SECTIONS_PGOFF < ZONES_PGOFF)? \ + SECTIONS_PGOFF : ZONES_PGOFF) #else #define ZONEID_SHIFT (NODES_SHIFT + ZONES_SHIFT) +#define ZONEID_PGOFF ((NODES_PGOFF < ZONES_PGOFF)? \ + NODES_PGOFF : ZONES_PGOFF) #endif -#if ZONES_WIDTH > 0 -#define ZONEID_PGSHIFT ZONES_PGSHIFT -#else -#define ZONEID_PGSHIFT NODES_PGOFF -#endif +#define ZONEID_PGSHIFT (ZONEID_PGOFF * (ZONEID_SHIFT != 0)) #if SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED #error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED @@ -471,7 +471,6 @@ static inline enum zone_type page_zonenum(struct page *page) */ static inline int page_zone_id(struct page *page) { - BUILD_BUG_ON(ZONEID_PGSHIFT == 0 && ZONEID_MASK); return (page->flags >> ZONEID_PGSHIFT) & ZONEID_MASK; } |