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mm: define __init_reserved_page_zone function

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Sometimes page structs must be unconditionally initialized as reserved,
regardless of DEFERRED_STRUCT_PAGE_INIT.

Define a function, __init_reserved_page_zone, containing code that already
did all of the work in init_reserved_page, and make it available for use.

Link: https://lkml.kernel.org/r/20250228182928.2645936-13-fvdl@google.com
Signed-off-by: Frank van der Linden <fvdl@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Frank van der Linden
2025-02-28 18:29:13 +00:00
committed by Andrew Morton
parent 3d61909cb7
commit d69d8261a9
2 changed files with 24 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
mm/internal.h
View File

@@ -1449,6 +1449,7 @@ static inline bool pte_needs_soft_dirty_wp(struct vm_area_struct *vma, pte_t pte
void __meminit __init_single_page(struct page *page, unsigned long pfn,
unsigned long zone, int nid);
void __meminit __init_reserved_page_zone(unsigned long pfn, int nid);
/* shrinker related functions */
unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg,

38
mm/mm_init.c
View File

@@ -650,6 +650,28 @@ static inline void fixup_hashdist(void)
static inline void fixup_hashdist(void) {}
#endif /* CONFIG_NUMA */
/*
* Initialize a reserved page unconditionally, finding its zone first.
*/
void __meminit __init_reserved_page_zone(unsigned long pfn, int nid)
{
pg_data_t *pgdat;
int zid;
pgdat = NODE_DATA(nid);
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
struct zone *zone = &pgdat->node_zones[zid];
if (zone_spans_pfn(zone, pfn))
break;
}
__init_single_page(pfn_to_page(pfn), pfn, zid, nid);
if (pageblock_aligned(pfn))
set_pageblock_migratetype(pfn_to_page(pfn), MIGRATE_MOVABLE);
}
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
static inline void pgdat_set_deferred_range(pg_data_t *pgdat)
{
@@ -708,24 +730,10 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
static void __meminit init_reserved_page(unsigned long pfn, int nid)
{
pg_data_t *pgdat;
int zid;
if (early_page_initialised(pfn, nid))
return;
pgdat = NODE_DATA(nid);
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
struct zone *zone = &pgdat->node_zones[zid];
if (zone_spans_pfn(zone, pfn))
break;
}
__init_single_page(pfn_to_page(pfn), pfn, zid, nid);
if (pageblock_aligned(pfn))
set_pageblock_migratetype(pfn_to_page(pfn), MIGRATE_MOVABLE);
__init_reserved_page_zone(pfn, nid);
}
#else
static inline void pgdat_set_deferred_range(pg_data_t *pgdat) {}