[PATCH] mm: Remove is_migrate_highatomic()

[Brendan Jackman <jackmanb@google.com>]

There are 3 potential reasons for is_migrate_*() helpers:

1. They represent higher-level attributes of migratetypes, like
   is_migrate_movable()

2. They are ifdef'd, like is_migrate_isolate().

3. For consistency with an is_migrate_*_page() helper, also like
   is_migrate_isolate().

It looks like is_migrate_highatomic() was for case 3, but that was
removed in commit e0932b6c1f94 ("mm: page_alloc: consolidate free page
accounting").

So remove the indirection and go back to a simple comparison.

Signed-off-by: Brendan Jackman <jackmanb@google.com>
---
 mm/internal.h   | 5 -----
 mm/page_alloc.c | 2 +-
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 45b725c3dc030cb22a3cb0ddb262b6300e65ed5a..45da9ff5694f628db18f740718f0a7a06c4548f0 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1333,11 +1333,6 @@ extern const struct trace_print_flags pageflag_names[];
 extern const struct trace_print_flags vmaflag_names[];
 extern const struct trace_print_flags gfpflag_names[];
 
-static inline bool is_migrate_highatomic(enum migratetype migratetype)
-{
-	return migratetype == MIGRATE_HIGHATOMIC;
-}
-
 void setup_zone_pageset(struct zone *zone);
 
 struct migration_target_control {
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ca9e6b9633f79ff28448a6008749fa6ca2696332..baead29b3e67bb3ae2291b00d7632aaf87ebcc4c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -797,7 +797,7 @@ static inline void account_freepages(struct zone *zone, int nr_pages,
 
 	if (is_migrate_cma(migratetype))
 		__mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
-	else if (is_migrate_highatomic(migratetype))
+	else if (migratetype == MIGRATE_HIGHATOMIC)
 		WRITE_ONCE(zone->nr_free_highatomic,
 			   zone->nr_free_highatomic + nr_pages);
 }

---
base-commit: 5654520c361a6638f9d9e889257dfce38c83f653
change-id: 20250821-is-migrate-highatomic-871c0ff05a84

Best regards,
-- 
Brendan Jackman <jackmanb@google.com>