diff options
| author | Ye Liu <ye.liu@linux.dev> | 2026-07-14 09:51:02 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-07-28 21:11:50 -0700 |
| commit | c95dc0a84b4c84103bd688a93b28d84e8b752568 (patch) | |
| tree | 7ca77b0b08bb4fe2efb49fd947936611de980681 /include/linux/page_owner.h | |
| parent | 7eeed888c99a0619911165030bf3f82b265c141a (diff) | |
mm: use enum migrate_reason instead of int for migration reason parameters
Replace all 'int reason' function parameters that carry migrate_reason
values with the proper 'enum migrate_reason' type. This makes the intent
explicit and leverages compiler type checking. The affected subsystems
are:
- page_owner: __folio_set_owner_migrate_reason(),
folio_set_owner_migrate_reason()
- migrate: migrate_pages(), migrate_pages_sync(),
migrate_pages_batch(), migrate_folios_move(),
migrate_hugetlbs(), unmap_and_move_huge_page()
- hugetlb: move_hugetlb_state(), htlb_allow_alloc_fallback()
- trace: mm_migrate_pages and mm_migrate_pages_start events
The 'short last_migrate_reason' struct field and internal helper parameter
in page_owner are intentionally left as 'short' since they store per-page
metadata where size matters.
No functional change.
Link: https://lore.kernel.org/20260714015117.78351-4-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/page_owner.h')
| -rw-r--r-- | include/linux/page_owner.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 3328357f6dba..8188ddc5c412 100644 --- a/include/linux/page_owner.h +++ b/include/linux/page_owner.h @@ -3,6 +3,7 @@ #define __LINUX_PAGE_OWNER_H #include <linux/jump_label.h> +#include <linux/migrate_mode.h> #ifdef CONFIG_PAGE_OWNER extern struct static_key_false page_owner_inited; @@ -14,7 +15,7 @@ extern void __set_page_owner(struct page *page, extern void __split_page_owner(struct page *page, int old_order, int new_order); extern void __folio_copy_owner(struct folio *newfolio, struct folio *old); -extern void __folio_set_owner_migrate_reason(struct folio *folio, int reason); +void __folio_set_owner_migrate_reason(struct folio *folio, enum migrate_reason reason); extern void __dump_page_owner(const struct page *page); extern void pagetypeinfo_showmixedcount_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone); @@ -43,7 +44,7 @@ static inline void folio_copy_owner(struct folio *newfolio, struct folio *old) if (static_branch_unlikely(&page_owner_inited)) __folio_copy_owner(newfolio, old); } -static inline void folio_set_owner_migrate_reason(struct folio *folio, int reason) +static inline void folio_set_owner_migrate_reason(struct folio *folio, enum migrate_reason reason) { if (static_branch_unlikely(&page_owner_inited)) __folio_set_owner_migrate_reason(folio, reason); @@ -68,7 +69,7 @@ static inline void split_page_owner(struct page *page, int old_order, static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio) { } -static inline void folio_set_owner_migrate_reason(struct folio *folio, int reason) +static inline void folio_set_owner_migrate_reason(struct folio *folio, enum migrate_reason reason) { } static inline void dump_page_owner(const struct page *page) |