Export filemap_remove_folio() for use by KVM. KVM requires this function to remove folios from guest_memfd's filemap.
guest_memfd used to rely on higher-level, exported truncation functions. To track memory that is actually allocated (i.e. i_blocks, st_blocks), guest_memfd will need a custom truncation function to do accounting cleanup and will be using filemap_remove_folio() for truncation. Signed-off-by: Ackerley Tng <[email protected]> --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index ebd75684cb0a7..379d62239fc5f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -49,6 +49,7 @@ #include <linux/sched/mm.h> #include <linux/sysctl.h> #include <linux/pgalloc.h> +#include <linux/kvm_types.h> #include <asm/tlbflush.h> #include "internal.h" @@ -262,6 +263,7 @@ void filemap_remove_folio(struct folio *folio) filemap_free_folio(mapping, folio); } +EXPORT_SYMBOL_FOR_KVM(filemap_remove_folio); /* * page_cache_delete_batch - delete several folios from page cache -- 2.53.0.345.g96ddfc5eaa-goog
