From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2430934D4EA for ; Mon, 23 Feb 2026 07:04:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771830302; cv=none; b=HJXfNVdFqsgL5yNH7yriJrSZFf0iQzGj/kGZGV+3p+U6NIfMUE10WVrdjxqBhHErYJmnAnxzkpc8pZ3biOAiV2pC1SB01dWLzI92nyaTdTvajb7DdAoBVFEVUL0dyYBwtn1YdJJi4L6B9WkXkzL0zVa1sF12TrHDl/kTyUx9kTc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771830302; c=relaxed/simple; bh=d3UwQnzpg88aX6gn7ACJy409YivRzc8RbQqNjcTrFfw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=HrqZVRpZ+P1pL3HYWzQquczwxBqUxw76jKQ8j+VKjNaQz+AH46b3CyBHfO1oV42zOonKKualLs1Z/PjgNbm4iW77KpTmPKHKGOiI8XsMjPKMuWuKLPGm7CvbRpcpX+1nAZcDOr6B74FPoWhd5+SPnpIc/mSG7miuYIGrXmXBdo8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=B6J0k94Y; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="B6J0k94Y" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2a77040ede0so48548065ad.2 for ; Sun, 22 Feb 2026 23:04:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1771830299; x=1772435099; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=W8EPkBYTIogg/WcIy2FNnZriREPEXUqsGjhG96y07ko=; b=B6J0k94YQxKXI/ATg+nnFkMegMK0+AC3JXFPYcwdbPpJQI6PB8F1FKAxK5PeGupwMD dQJiUUDatgLKphe4YPs2kJyg4BVq8njg69WHA9tn1ejUCn40awFihwD4+fcLibNP/Uj6 tb9oa8JlrGzeqcUhc/n+1Q3oxnmEdSCiQvj+lYLuqUem6hLo0pechZbbnDqqhMnh/QBZ ivocdVkfelgivR5MVabH5RikvqZO4Zlsw38O4Bv6QXxI7oLDATsARVJEK+lA1eIME57O /OiaeQf5FaexRoN2Dx+l9fekkDYwz7TjsM7SK0rThrs8nviZtP4Vliz75osEJNYEittI l9LQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771830299; x=1772435099; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=W8EPkBYTIogg/WcIy2FNnZriREPEXUqsGjhG96y07ko=; b=cXz1UMoe6zHgmfGx5L/lb+fhmhX0UaivV2P6piyY0fp8tZ5ijievTjYyi1ayOPwW62 ZHH+RP7lnTlFfogylEUzJSlulJfaKXeiBs+13/hzKgMhbyjQpQVoAKwLSpB7wROSnibl Bw56IBUVzwUH8ZyKxYdpcef7ABqntbtFTGeXvF608LrtBsfZkbpwMmrWKy9fB+o1aNAA UO3/hMt33uJ7jsK+Jy8IcVv1ojh7g4J98pShWW0MkXXNvLA/6expG2TXkh6hCPUOzbN/ SYoeTnDOtGImCPhet3Wjeh/TSidTAAbVoPG5nFqdAxItfqskvEDy6aLk5AJIj6kGIGIs aJuQ== X-Forwarded-Encrypted: i=1; AJvYcCX2n3kTiwsd8lp3FhiILZupmf0kc5bBe+tYLQJqjBJdLDt9sLAhjKBUzmiF+q+KrY+wx7wSAo8A6SMHY0Y=@vger.kernel.org X-Gm-Message-State: AOJu0YyW/STDbX1F9MyMdJMWZLOn26YoNmrj9dI4XGrNx2RYwyCWokOJ UsZHSh7Y7ZVwF/oTNA1skqsOrp9mNBiD8rSJ5lTxe53TvXXZhp0wIdeC/VuXQsKCw0/Ijwoo66b +NJeX7N3zaftJegg31JHrE0t5NQ== X-Received: from pjbx30.prod.google.com ([2002:a17:90a:38a1:b0:356:3562:569c]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:248:b0:2a0:a33f:3049 with SMTP id d9443c01a7336-2ad743fe006mr64180505ad.4.1771830299282; Sun, 22 Feb 2026 23:04:59 -0800 (PST) Date: Mon, 23 Feb 2026 07:04:39 +0000 In-Reply-To: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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" 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