diff mbox series

[v2,23/29] acct: avoid pointless reference count bump

Message ID	20241125-work-cred-v2-23-68b9d38bb5b2@kernel.org
State	New
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C00921D049D; Mon, 25 Nov 2024 14:11:13 +0000 (UTC) From: Christian Brauner <brauner@kernel.org> Date: Mon, 25 Nov 2024 15:10:19 +0100 Subject: [PATCH v2 23/29] acct: avoid pointless reference count bump Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20241125-work-cred-v2-23-68b9d38bb5b2@kernel.org> References: <20241125-work-cred-v2-0-68b9d38bb5b2@kernel.org> In-Reply-To: <20241125-work-cred-v2-0-68b9d38bb5b2@kernel.org> To: Linus Torvalds <torvalds@linux-foundation.org> Cc: Amir Goldstein <amir73il@gmail.com>, Miklos Szeredi <miklos@szeredi.hu>, Al Viro <viro@zeniv.linux.org.uk>, Jens Axboe <axboe@kernel.dk>, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Christian Brauner <brauner@kernel.org>
Series	cred: rework {override,revert}_creds() \| expand [v2,00/29] cred: rework {override,revert}_creds() [v2,01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g [v2,02/29] cred: return old creds from revert_creds_light() [v2,03/29] tree-wide: s/revert_creds()/put_cred(revert_creds_light())/g [v2,04/29] cred: remove old {override,revert}_creds() helpers [v2,05/29] tree-wide: s/override_creds_light()/override_creds()/g [v2,06/29] tree-wide: s/revert_creds_light()/revert_creds()/g [v2,07/29] firmware: avoid pointless reference count bump [v2,08/29] sev-dev: avoid pointless cred reference count bump [v2,09/29] target_core_configfs: avoid pointless cred reference count bump [v2,10/29] aio: avoid pointless cred reference count bump [v2,11/29] binfmt_misc: avoid pointless cred reference count bump [v2,12/29] coredump: avoid pointless cred reference count bump [v2,13/29] nfs/localio: avoid pointless cred reference count bumps [v2,14/29] nfs/nfs4idmap: avoid pointless reference count bump [v2,15/29] nfs/nfs4recover: avoid pointless cred reference count bump [v2,16/29] nfsfh: avoid pointless cred reference count bump [v2,17/29] open: avoid pointless cred reference count bump [v2,18/29] ovl: avoid pointless cred reference count bump [v2,19/29] cifs: avoid pointless cred reference count bump [v2,20/29] cifs: avoid pointless cred reference count bump [v2,21/29] smb: avoid pointless cred reference count bump [v2,22/29] io_uring: avoid pointless cred reference count bump [v2,23/29] acct: avoid pointless reference count bump [v2,24/29] cgroup: avoid pointless cred reference count bump [v2,25/29] trace: avoid pointless cred reference count bump [v2,26/29] dns_resolver: avoid pointless cred reference count bump [v2,27/29] cachefiles: avoid pointless cred reference count bump [v2,28/29] nfsd: avoid pointless cred reference count bump [v2,29/29] cred: remove unused get_new_cred()

Commit Message

Christian Brauner Nov. 25, 2024, 2:10 p.m. UTC

file->f_cred already holds a reference count that is stable during the
operation.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 kernel/acct.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff mbox series

Patch

diff --git a/kernel/acct.c b/kernel/acct.c
index ea8c94887b5853b10e7a7e632f7b0bc4d52ab10b..179848ad33e978a557ce695a0d6020aa169177c6 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -501,7 +501,7 @@  static void do_acct_process(struct bsd_acct_struct *acct)
 	flim = rlimit(RLIMIT_FSIZE);
 	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
 	/* Perform file operations on behalf of whoever enabled accounting */
-	orig_cred = override_creds(get_new_cred(file->f_cred));
+	orig_cred = override_creds(file->f_cred);
 
 	/*
 	 * First check to see if there is enough free_space to continue
@@ -541,7 +541,7 @@  static void do_acct_process(struct bsd_acct_struct *acct)
 	}
 out:
 	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = flim;
-	put_cred(revert_creds(orig_cred));
+	revert_creds(orig_cred);
 }
 
 /**