[PATCH v2 27/32] mm: shmem: export some functions to internal.h
From: Pasha Tatashin <pasha.tatashin@soleen.com>
Date: 2025-07-23 14:47:51
Also in:
linux-doc, linux-fsdevel, linux-mm, lkml
Subsystem:
memory management, memory management - core, the rest, tmpfs (shmem filesystem) · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds, Hugh Dickins
From: Pratyush Yadav <redacted> shmem_inode_acct_blocks(), shmem_recalc_inode(), and shmem_add_to_page_cache() are used by shmem_alloc_and_add_folio(). This functionality will also be used in the future by Live Update Orchestrator (LUO) to recreate memfd files after a live update. Signed-off-by: Pratyush Yadav <redacted> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> --- mm/internal.h | 6 ++++++ mm/shmem.c | 10 +++++----- 2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/mm/internal.h b/mm/internal.h
index 6b8ed2017743..991917a8ae23 100644
--- a/mm/internal.h
+++ b/mm/internal.h@@ -1535,6 +1535,12 @@ void __meminit __init_page_from_nid(unsigned long pfn, int nid); unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, int priority); +int shmem_add_to_page_cache(struct folio *folio, + struct address_space *mapping, + pgoff_t index, void *expected, gfp_t gfp); +int shmem_inode_acct_blocks(struct inode *inode, long pages); +void shmem_recalc_inode(struct inode *inode, long alloced, long swapped); + #ifdef CONFIG_SHRINKER_DEBUG static inline __printf(2, 0) int shrinker_debugfs_name_alloc( struct shrinker *shrinker, const char *fmt, va_list ap)
diff --git a/mm/shmem.c b/mm/shmem.c
index d1e74f59cdba..4a616fe595e2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c@@ -219,7 +219,7 @@ static inline void shmem_unacct_blocks(unsigned long flags, long pages) vm_unacct_memory(pages * VM_ACCT(PAGE_SIZE)); } -static int shmem_inode_acct_blocks(struct inode *inode, long pages) +int shmem_inode_acct_blocks(struct inode *inode, long pages) { struct shmem_inode_info *info = SHMEM_I(inode); struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
@@ -433,7 +433,7 @@ static void shmem_free_inode(struct super_block *sb, size_t freed_ispace) * But normally info->alloced == inode->i_mapping->nrpages + info->swapped * So mm freed is info->alloced - (inode->i_mapping->nrpages + info->swapped) */ -static void shmem_recalc_inode(struct inode *inode, long alloced, long swapped) +void shmem_recalc_inode(struct inode *inode, long alloced, long swapped) { struct shmem_inode_info *info = SHMEM_I(inode); long freed;
@@ -879,9 +879,9 @@ static void shmem_update_stats(struct folio *folio, int nr_pages) /* * Somewhat like filemap_add_folio, but error if expected item has gone. */ -static int shmem_add_to_page_cache(struct folio *folio, - struct address_space *mapping, - pgoff_t index, void *expected, gfp_t gfp) +int shmem_add_to_page_cache(struct folio *folio, + struct address_space *mapping, + pgoff_t index, void *expected, gfp_t gfp) { XA_STATE_ORDER(xas, &mapping->i_pages, index, folio_order(folio)); long nr = folio_nr_pages(folio);
--
2.50.0.727.gbf7dc18ff4-goog