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Mon, 27 Apr 2026 00:07:32 -0400 (EDT) From: NeilBrown To: Linus Torvalds , Alexander Viro , Christian Brauner , Jan Kara , Jeff Layton , Trond Myklebust , Anna Schumaker , Miklos Szeredi , Amir Goldstein , Jeremy Kerr , Ard Biesheuvel Cc: linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 12/19] shmem: use d_duplicate() Date: Mon, 27 Apr 2026 14:01:30 +1000 Message-ID: <20260427040517.828226-13-neilb@ownmail.net> X-Mailer: git-send-email 2.50.0.107.gf914562f5916.dirty In-Reply-To: <20260427040517.828226-1-neilb@ownmail.net> References: <20260427040517.828226-1-neilb@ownmail.net> Reply-To: NeilBrown Precedence: bulk X-Mailing-List: linux-efi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 3b5dc21b323c..8b0d2340dee7 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4006,11 +4006,12 @@ static int shmem_whiteout(struct mnt_idmap *idmap, struct dentry *whiteout; int error; - whiteout = d_alloc(old_dentry->d_parent, &old_dentry->d_name); + whiteout = d_duplicate(old_dentry); if (!whiteout) return -ENOMEM; error = shmem_mknod(idmap, old_dir, whiteout, S_IFCHR | WHITEOUT_MODE, WHITEOUT_DEV); + d_lookup_done(whiteout); dput(whiteout); return error; } -- 2.50.0.107.gf914562f5916.dirty