From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) (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 9427E282F16 for ; Mon, 21 Sep 2026 00:48:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789951722; cv=none; b=H5vx4cvL7GjhWKvcpQhaqLBDDw29LAhmf71GpKTkrpBqlJjHaUwXaIlYi/MCnJ1ZfGgmXq27u7AsTbt8xyfJyaNGB9FJL3fGfannOixCUcWhJ7w+5Bem3s2tlL5T3DHPQ/4QJY2T4KACfgsNaflN2J+YWEfGVLxtDyyUhxHvlYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789951722; c=relaxed/simple; bh=smolpSPLyRzt3C+D1JHi3AqucD1pUoZl1tQGGaZ45JA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=XUITyT1dITCJwGnhfDGpsrwb1+FlYY3GvufCvyQI+Lvogtmf12kd5Deo9yfwMKJgu5+cn30GlTauqlA3vkkycWPahi5JVSTkIZZMzXPnSa1oMvCwGp3fJabPmWeafAwf0SSh+0heijYsR0sn+k8fsuz3RAcg1spLN1IKAWw9s34= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--skhawaja.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=SDAMdGij; arc=none smtp.client-ip=209.85.214.200 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--skhawaja.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="SDAMdGij" Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-2d9336581a2so45129605ad.3 for ; Sun, 20 Sep 2026 17:48:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1789951720; x=1790556520; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=5rIYSaUxr2dmbQ4fWz0MikFLRE1YKdMT0WLnLm0z0eI=; b=SDAMdGijtguYAtnSMOHATZqLSgU6Pc72BPWLuWQVRa0bW1T5dFdDo2iB4ZikDOFm/O 6O1aSdIZjjM4VMNwn2aCNJhHMwQ5ZoJ3eOJfjuXrhvrtgw1FQ3uSUfLF7Tw8oE14T/3x JzYx81cxXbHqd27Q+Lwc4rHrPipxAx2LuRd77RvVbcdJU89MS33s8aGYB2+j8vTVMeK5 H73js2scbKmCoybbipl1ffOjejiMUKYYNx91mS0fI/S5/jxzQB9rOmFjI3fupwaDAWBw id5RSE4Ml0niI0KWLWGzN7pY28g3gnrmKnatG7xbLC7aDw3d5MuOg2kjWI3mJPCwYV36 JzDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789951720; x=1790556520; h=content-type: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:content-type; bh=5rIYSaUxr2dmbQ4fWz0MikFLRE1YKdMT0WLnLm0z0eI=; b=EtRG0Eg7kNNh8+6tvhC9otnYn7E8ILyucpQPua/J6o8uV7nTs8mlO7mYVGfEIFkVqZ 6gjBO3cR9+2IdqBGcczpQUdYEPW3M/v5XblfPn7BAbHU2X0bNAGQWLB1qrmOOaOYYaiv UEBEoVhul0qGw6z/4BghKvn6RdoiGmBVTkXGLogSWliQZK+EMXvKROnv7ueuFEg6Dexy 5TqW1UGaFbOb+ArmyUGPXyN0f3BPAPDjNY5ODLqdDe1kxWzEG/Co8Tgq8viQFv5OjWmE eyFsxqPqs22S0oaVgIYzBoauxvq9UeKKi8YqmUGxng49xENoXH7bPBKZ8NGcjbnQg82Z RHmg== X-Forwarded-Encrypted: i=1; AKwUvByh+ktJv0Zchzd8yMd0CAAtcw5yP9tnikka74brQv1ZM8lxg1ehxwYrKUKqnEROW0ZgsYM=@vger.kernel.org X-Gm-Message-State: AFuF++n9ana6MsFobAWz+g/PDpSMSETWeOFMQJuF1VkpRLDvgFiMwLGX ApQR0XSTJDH7QLPTJuom3QPwDFlKXEqmjV/pM98rsjKp3Oqa8/UscGEtEhh4HQk1s54dqqihb5S Kph4EdilhF+kOTg== X-Received: from plld8.prod.google.com ([2002:a17:902:7288:b0:2dd:1e7c:bcec]) (user=skhawaja job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:3c6b:b0:2dd:c100:9433 with SMTP id d9443c01a7336-2ddc1009c3cmr88814875ad.49.1789951719834; Sun, 20 Sep 2026 17:48:39 -0700 (PDT) Date: Mon, 21 Sep 2026 00:48:17 +0000 In-Reply-To: <20260921004834.2601285-1-skhawaja@google.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260921004834.2601285-1-skhawaja@google.com> X-Mailer: git-send-email 2.55.0.1082.g2b9226bbc0-goog Message-ID: <20260921004834.2601285-2-skhawaja@google.com> Subject: [PATCH v5 01/18] memfd: export memfd_get_seals() From: Samiullah Khawaja To: David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Jason Gunthorpe Cc: Samiullah Khawaja , Hugh Dickins , Baolin Wang , Andrew Morton , linux-mm@kvack.org, "Pratyush Yadav (Google)" , Ankit Soni , Robin Murphy , Kevin Tian , Alex Williamson , Shuah Khan , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Pasha Tatashin , David Matlack , Pranjal Shrivastava , Vipin Sharma Content-Type: text/plain; charset="UTF-8" memfd_get_seals() is used by iommufd during preservation to make sure that he preserved memfd was sealed when it was mapped into iommufd. Since iommufd can be built as a module, export memfd_get_seals() to avoid linker error. Cc: Hugh Dickins Cc: Baolin Wang Cc: Andrew Morton Cc: linux-mm@kvack.org Acked-by: Pratyush Yadav (Google) Reviewed-by: Ankit Soni Signed-off-by: Samiullah Khawaja --- mm/memfd.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/mm/memfd.c b/mm/memfd.c index c708d92533f4..888ccf3778c7 100644 --- a/mm/memfd.c +++ b/mm/memfd.c @@ -6,6 +6,7 @@ * use by hugetlbfs as well as tmpfs. */ +#include #include #include #include @@ -310,12 +311,19 @@ int memfd_add_seals(struct file *file, unsigned int seals) return error; } +/** + * memfd_get_seals - Gets current seals on a memfd + * @file: struct file representing the memfd + * + * Returns seals if file is a memfd, otherwise returns -EINVAL + */ int memfd_get_seals(struct file *file) { unsigned int *seals = memfd_file_seals_ptr(file); return seals ? *seals : -EINVAL; } +EXPORT_SYMBOL_GPL(memfd_get_seals); long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg) { -- 2.55.0.1082.g2b9226bbc0-goog