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Thu, 12 Mar 2026 17:49:22 -0400 (EDT) From: NeilBrown To: Linus Torvalds , Alexander Viro , Christian Brauner , Jan Kara , Jeff Layton , Trond Myklebust , Anna Schumaker , Carlos Maiolino , Miklos Szeredi , Amir Goldstein , Jan Harkes , Hugh Dickins , Baolin Wang , David Howells , Marc Dionne , Steve French , Namjae Jeon , Sungjong Seo , Yuezhang Mo , Andreas Hindborg , Breno Leitao , "Theodore Ts'o" , Andreas Dilger , Steven Rostedt , Masami Hiramatsu , Ilya Dryomov , Alex Markuze , Viacheslav Dubeyko , Tyler Hicks , Andreas Gruenbacher , Richard Weinberger , Anton Ivanov , Johannes Berg , Jeremy Kerr , Ard Biesheuvel Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-unionfs@vger.kernel.org, coda@cs.cmu.edu, linux-mm@kvack.org, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, ceph-devel@vger.kernel.org, ecryptfs@vger.kernel.org, gfs2@lists.linux.dev, linux-um@lists.infradead.org, linux-efi@vger.kernel.org Subject: [PATCH 18/53] shmem: use d_duplicate() Date: Fri, 13 Mar 2026 08:12:05 +1100 Message-ID: <20260312214330.3885211-19-neilb@ownmail.net> X-Mailer: git-send-email 2.50.0.107.gf914562f5916.dirty In-Reply-To: <20260312214330.3885211-1-neilb@ownmail.net> References: <20260312214330.3885211-1-neilb@ownmail.net> Reply-To: NeilBrown Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: NeilBrown To prepare for d_alloc_parallel() being permitted without a directory lock, use d_duplicate() when duplicating a dentry in order to create a whiteout. Signed-off-by: NeilBrown --- mm/shmem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index b40f3cd48961..6b39a59355d7 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4030,11 +4030,12 @@ static int shmem_whiteout(struct mnt_idmap *idmap, struct dentry *whiteout; int error; =20 - whiteout =3D d_alloc(old_dentry->d_parent, &old_dentry->d_name); + whiteout =3D d_duplicate(old_dentry); if (!whiteout) return -ENOMEM; error =3D shmem_mknod(idmap, old_dir, whiteout, S_IFCHR | WHITEOUT_MODE, WHITEOUT_DEV); + d_lookup_done(whiteout); dput(whiteout); return error; } --=20 2.50.0.107.gf914562f5916.dirty