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mm/bootmem_info: export register_page_bootmem_memmap

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If other mm code wants to use this function for early memmap inialization
(on the platforms that have it), it should be made available properly, not
just unconditionally in mm.h

Make this function available for such cases.

Link: https://lkml.kernel.org/r/20250228182928.2645936-10-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 18:29:10 +00:00 committed by Andrew Morton
parent d3cd80c587
commit 243a75e236
3 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/mm/init_64.c
View File

@ -41,6 +41,7 @@
#include <linux/libfdt.h>
#include <linux/memremap.h>
#include <linux/memory.h>
#include <linux/bootmem_info.h>
#include <asm/pgalloc.h>
#include <asm/page.h>
@ -386,10 +387,13 @@ void __ref vmemmap_free(unsigned long start, unsigned long end,
}
#endif
#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
}
#endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
#endif /* CONFIG_SPARSEMEM_VMEMMAP */

7
include/linux/bootmem_info.h
View File

@ -18,6 +18,8 @@ enum bootmem_type {
#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
unsigned long nr_pages);
void get_page_bootmem(unsigned long info, struct page *page,
enum bootmem_type type);
@ -58,6 +60,11 @@ static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
}
static inline void register_page_bootmem_memmap(unsigned long section_nr,
struct page *map, unsigned long nr_pages)
{
}
static inline void put_page_bootmem(struct page *page)
{
}

3
include/linux/mm.h
View File

@ -4018,9 +4018,6 @@ static inline bool vmemmap_can_optimize(struct vmem_altmap *altmap,
}
#endif
void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
unsigned long nr_pages);
enum mf_flags {
MF_COUNT_INCREASED = 1 << 0,
MF_ACTION_REQUIRED = 1 << 1,