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ANDROID: GKI: page_alloc ABI fixup

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Move nr_free_highatomic out of struct zone to avoid ABI breakage.

Change-Id: I7f2e4ffb4c1e335d638fc76ddb864a67461da131
Bug: 420771453
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
This commit is contained in:
Kalesh Singh
2025-05-28 10:47:35 -07:00
parent 819bdc71dc
commit c06fa3b5cd
4 changed files with 7 additions and 6 deletions
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1
include/linux/mmzone.h
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@@ -839,7 +839,6 @@ struct zone {
unsigned long watermark_boost;
unsigned long nr_reserved_highatomic;
unsigned long nr_free_highatomic;
/*
* We don't know if the memory that we're going to allocate will be

2
mm/internal.h
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@@ -470,7 +470,7 @@ pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
#define K(x) ((x) << (PAGE_SHIFT-10))
extern char * const zone_names[MAX_NR_ZONES];
extern unsigned long free_highatomics[MAX_NR_ZONES];
extern unsigned long nr_free_highatomic[MAX_NR_ZONES];
/* perform sanity checks on struct pages being allocated or freed */
DECLARE_STATIC_KEY_MAYBE(CONFIG_DEBUG_VM, check_pages_enabled);

8
mm/page_alloc.c
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@@ -324,6 +324,8 @@ const char * const migratetype_names[MIGRATE_TYPES] = {
#endif
};
unsigned long nr_free_highatomic[MAX_NR_ZONES] = {0};
int min_free_kbytes = 1024;
int user_min_free_kbytes = -1;
static int watermark_boost_factor __read_mostly = 15000;
@@ -770,8 +772,8 @@ 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))
WRITE_ONCE(zone->nr_free_highatomic,
zone->nr_free_highatomic + nr_pages);
WRITE_ONCE(nr_free_highatomic[zone_idx(zone)],
nr_free_highatomic[zone_idx(zone)] + nr_pages);
}
/* Used for pages not on another list */
@@ -3232,7 +3234,7 @@ static inline long __zone_watermark_unusable_free(struct zone *z,
* watermark then subtract the free pages reserved for highatomic.
*/
if (likely(!(alloc_flags & ALLOC_RESERVES)))
unusable_free += READ_ONCE(z->nr_free_highatomic);
unusable_free += READ_ONCE(nr_free_highatomic[zone_idx(z)]);
#ifdef CONFIG_CMA
/* If allocation can't use CMA areas don't use free CMA pages */

2
mm/show_mem.c
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@@ -342,7 +342,7 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z
K(low_wmark_pages(zone)),
K(high_wmark_pages(zone)),
K(zone->nr_reserved_highatomic),
K(free_highatomics[zone_idx(zone)]),
K(nr_free_highatomic[zone_idx(zone)]),
K(zone_page_state(zone, NR_ZONE_ACTIVE_ANON)),
K(zone_page_state(zone, NR_ZONE_INACTIVE_ANON)),
K(zone_page_state(zone, NR_ZONE_ACTIVE_FILE)),