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The original function becomes a static inline wrapper that passes NULL for the mempolicy. This infrastructure will enable future support for NUMA-aware page cache allocations in guest_memfd memory backend KVM guests. Reviewed-by: Pankaj Gupta Reviewed-by: Vlastimil Babka Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Hildenbrand Signed-off-by: Shivank Garg --- include/linux/pagemap.h | 10 ++++++++-- mm/filemap.c | 11 ++++++----- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index ce617a35dc35..94d65ced0a1d 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -747,11 +747,17 @@ static inline fgf_t fgf_set_order(size_t size) } void *filemap_get_entry(struct address_space *mapping, pgoff_t index); -struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, - fgf_t fgp_flags, gfp_t gfp); +struct folio *__filemap_get_folio_mpol(struct address_space *mapping, + pgoff_t index, fgf_t fgf_flags, gfp_t gfp, struct mempolicy *policy); struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, fgf_t fgp_flags, gfp_t gfp); +static inline struct folio *__filemap_get_folio(struct address_space *mapping, + pgoff_t index, fgf_t fgf_flags, gfp_t gfp) +{ + return __filemap_get_folio_mpol(mapping, index, fgf_flags, gfp, NULL); +} + /** * write_begin_get_folio - Get folio for write_begin with flags. * @iocb: The kiocb passed from write_begin (may be NULL). diff --git a/mm/filemap.c b/mm/filemap.c index 495f7f5c3d2e..03f223be575c 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1897,11 +1897,12 @@ void *filemap_get_entry(struct address_space *mapping, pgoff_t index) } /** - * __filemap_get_folio - Find and get a reference to a folio. + * __filemap_get_folio_mpol - Find and get a reference to a folio. * @mapping: The address_space to search. * @index: The page index. * @fgp_flags: %FGP flags modify how the folio is returned. * @gfp: Memory allocation flags to use if %FGP_CREAT is specified. + * @policy: NUMA memory allocation policy to follow. * * Looks up the page cache entry at @mapping & @index. * @@ -1912,8 +1913,8 @@ void *filemap_get_entry(struct address_space *mapping, pgoff_t index) * * Return: The found folio or an ERR_PTR() otherwise. */ -struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, - fgf_t fgp_flags, gfp_t gfp) +struct folio *__filemap_get_folio_mpol(struct address_space *mapping, + pgoff_t index, fgf_t fgp_flags, gfp_t gfp, struct mempolicy *policy) { struct folio *folio; @@ -1983,7 +1984,7 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, err = -ENOMEM; if (order > min_order) alloc_gfp |= __GFP_NORETRY | __GFP_NOWARN; - folio = filemap_alloc_folio(alloc_gfp, order, NULL); + folio = filemap_alloc_folio(alloc_gfp, order, policy); if (!folio) continue; @@ -2030,7 +2031,7 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, folio_clear_dropbehind(folio); return folio; } -EXPORT_SYMBOL(__filemap_get_folio); +EXPORT_SYMBOL(__filemap_get_folio_mpol); static inline struct folio *find_get_entry(struct xa_state *xas, pgoff_t max, xa_mark_t mark) -- 2.43.0