From f0369fb13619569ba8564ce8d4fc9d385bbee8a2 Mon Sep 17 00:00:00 2001 From: Kiryl Shutsemau Date: Fri, 27 Feb 2026 19:42:40 +0000 Subject: mm: change the interface of prep_compound_tail() Instead of passing down the head page and tail page index, pass the tail and head pages directly, as well as the order of the compound page. This is a preparation for changing how the head position is encoded in the tail page. Link: https://lkml.kernel.org/r/20260227194302.274384-3-kas@kernel.org Signed-off-by: Kiryl Shutsemau Reviewed-by: Muchun Song Reviewed-by: Zi Yan Acked-by: David Hildenbrand (arm) Reviewed-by: Vlastimil Babka Cc: Albert Ou Cc: Alexandre Ghiti Cc: Baoquan He Cc: Christoph Lameter Cc: David Rientjes Cc: Frank van der Linden Cc: Harry Yoo Cc: Huacai Chen Cc: Johannes Weiner Cc: Jonathan Corbet Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Oscar Salvador Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Roman Gushchin Cc: Usama Arif Cc: WANG Xuerui Signed-off-by: Andrew Morton --- mm/internal.h | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'mm/internal.h') diff --git a/mm/internal.h b/mm/internal.h index 2daa6a744172..9cfbd8e41914 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -897,13 +897,12 @@ static inline void prep_compound_head(struct page *page, unsigned int order) INIT_LIST_HEAD(&folio->_deferred_list); } -static inline void prep_compound_tail(struct page *head, int tail_idx) +static inline void prep_compound_tail(struct page *tail, + const struct page *head, unsigned int order) { - struct page *p = head + tail_idx; - - p->mapping = TAIL_MAPPING; - set_compound_head(p, head); - set_page_private(p, 0); + tail->mapping = TAIL_MAPPING; + set_compound_head(tail, head, order); + set_page_private(tail, 0); } void post_alloc_hook(struct page *page, unsigned int order, gfp_t gfp_flags); -- cgit v1.2.3