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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 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 1DDFDC000A X-Stat-Signature: whg3x13jrxmgu7fr7o57b8wri1yxxr8f X-Rspam-User: X-HE-Tag: 1773352178-888441 X-HE-Meta: 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 smdggkUv Dny1eQbQ2Asce6fuonQe3w/vBbpJxMFCUVpDabYrRqMNpEspOyelXqTLmqDIDG38ay3N5GRCCjcwH765vIgVeG5bUrCOZsClZHI5zYoY8+SF0DDwPjZmiQBsBc90OEKRpp4wYC2vfjpI8tvFYkrz65AzH00oLNPWtP9qdEW/iG77jlSeRfK5Y05bzw87bMaonVshHLbTnOT7MI/kVsnsyApHcJFIjeM4L6rngTSGbfeRpLOKb/IAYPVmxL2mQp245RBmEc9jF+64pjAwxXYHkKYT/XkyHFZuJ2tpbwlNrUszbeRZDs2fBy//4meqNOWf7tGW84hq/Xmhi+qDs0O+22OPLqg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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; - 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