From 29446dd80ef24e1e769f8b4a3aa6f4ac2d68321c Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Tue, 5 Aug 2025 18:22:54 +0100 Subject: [PATCH] mm: introduce memdesc_zonenum() Remove a conversion from folio to page by passing the folio->flags (which are a copy of the page->flags) to the new memdesc_zonenum() function. Link: https://lkml.kernel.org/r/20250805172307.1302730-5-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Zi Yan Cc: Shakeel Butt Signed-off-by: Andrew Morton --- include/linux/mmzone.h | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 990560cd99ee..80a3b6642603 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -1183,15 +1183,20 @@ static inline bool zone_is_empty(struct zone *zone) #define KASAN_TAG_MASK ((1UL << KASAN_TAG_WIDTH) - 1) #define ZONEID_MASK ((1UL << ZONEID_SHIFT) - 1) +static inline enum zone_type memdesc_zonenum(memdesc_flags_t flags) +{ + ASSERT_EXCLUSIVE_BITS(flags.f, ZONES_MASK << ZONES_PGSHIFT); + return (flags.f >> ZONES_PGSHIFT) & ZONES_MASK; +} + static inline enum zone_type page_zonenum(const struct page *page) { - ASSERT_EXCLUSIVE_BITS(page->flags, ZONES_MASK << ZONES_PGSHIFT); - return (page->flags.f >> ZONES_PGSHIFT) & ZONES_MASK; + return memdesc_zonenum(page->flags); } static inline enum zone_type folio_zonenum(const struct folio *folio) { - return page_zonenum(&folio->page); + return memdesc_zonenum(folio->flags); } #ifdef CONFIG_ZONE_DEVICE -- 2.51.0