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Sun, 22 Feb 2026 23:04:59 -0800 (PST) Date: Mon, 23 Feb 2026 07:04:39 +0000 In-Reply-To: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.53.0.345.g96ddfc5eaa-goog Message-ID: Subject: [RFC PATCH v1 06/10] mm: filemap: Export filemap_remove_folio() From: Ackerley Tng To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, willy@infradead.org, pbonzini@redhat.com, shuah@kernel.org, ackerleytng@google.com, seanjc@google.com, shivankg@amd.com, rick.p.edgecombe@intel.com, yan.y.zhao@intel.com, rientjes@google.com, fvdl@google.com, jthoughton@google.com, vannapurve@google.com, pratyush@kernel.org, pasha.tatashin@soleen.com, kalyazin@amazon.com, tabba@google.com, michael.roth@amd.com Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: BBF81C0005 X-Stat-Signature: d6ddyz71pds3j19u1tzyquxa35rxr9gq X-HE-Tag: 1771830300-625248 X-HE-Meta: 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 VAsrnSIc 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 --- 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 #include #include +#include #include #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