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mm/page_ext: remove pgdat_page_ext_init()

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pgdat_page_ext_init() sets pgdat->node_page_ext to NULL only on FLATMEM. 
FLATMEM depends on !NUMA, so the pgdat is always the zero-initialized
contig_page_data and the store has no effect.

So remove the call site, the unused function and its declaration.

No functional change.

Link: https://lore.kernel.org/20260804151145.3419768-3-ekffu200098@gmail.com
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sang-Heon Jeon
2026-08-05 00:11:42 +09:00
committed by Andrew Morton
parent 34568000f3
commit 0ddb8bb85b
3 changed files with 0 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/page_ext.h
View File

@@ -55,7 +55,6 @@ struct page_ext {
extern bool early_page_ext;
extern unsigned long page_ext_size;
extern void pgdat_page_ext_init(struct pglist_data *pgdat);
static inline bool early_page_ext_enabled(void)
{
@@ -202,10 +201,6 @@ static inline bool early_page_ext_enabled(void)
return false;
}
static inline void pgdat_page_ext_init(struct pglist_data *pgdat)
{
}
static inline void page_ext_init(void)
{
}

1
mm/mm_init.c
View File

@@ -1394,7 +1394,6 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
for (i = 0; i < NR_VMSCAN_THROTTLE; i++)
init_waitqueue_head(&pgdat->reclaim_wait[i]);
pgdat_page_ext_init(pgdat);
lruvec_init(&pgdat->__lruvec);
}

9
mm/page_ext.c
View File

@@ -164,11 +164,6 @@ void __init page_ext_init_flatmem_late(void)
invoke_init_callbacks();
}
void __meminit pgdat_page_ext_init(struct pglist_data *pgdat)
{
pgdat->node_page_ext = NULL;
}
static struct page_ext *lookup_page_ext(const struct page *page)
{
unsigned long pfn = page_to_pfn(page);
@@ -494,10 +489,6 @@ void __init page_ext_init(void)
panic("Out of memory");
}
void __meminit pgdat_page_ext_init(struct pglist_data *pgdat)
{
}
#endif
/**