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[80.187.86.54]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c5095b23afdsm74417566b.13.2026.11.13.02.02.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 02:02:38 -0800 (PST) Message-ID: <8c51aa1ad231dea30af06ecf761a971f5958d063.camel@amutable.com> Subject: Re: [PATCH RFC 05/41] kernfs: use fc_init_pseudo() From: Alexander Mikhalitsyn To: Christian Brauner , linux-fsdevel@vger.kernel.org Cc: Jann Horn , Chris Mason , Josef Bacik , Christoph Hellwig , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Alexander Viro , Jan Kara , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, driver-core@lists.linux.dev, linux-mm@kvack.org, bpf@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, apparmor@lists.ubuntu.com, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, linux-efi@vger.kernel.org, xen-devel@lists.xenproject.org, ocfs2-devel@lists.linux.dev, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-usb@vger.kernel.org, Amir Goldstein , linux-erofs@lists.ozlabs.org, linux-kselftest@vger.kernel.org Date: Fri, 13 Nov 2026 11:02:36 +0100 In-Reply-To: <20261110-work-loop-pseudo-v1-5-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-5-4c998976c6c7@kernel.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-0+deb13u1 X-Archived-By: MIME-Version: 1.0 X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam09 X-Stat-Signature: zxwx7ibja6o49toe6qpighj6ggo66tjo X-Rspamd-Queue-Id: AE598100009 X-Rspam-User: X-HE-Tag: 1794564160-520419 X-HE-Meta: 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 kQ1Bj5H3 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote: > Initialize all kernfs based filesystems as pseudo filesystems in > kernfs_get_tree() instead of raising SB_I_NOEXEC and SB_I_NODEV by > hand > in kernfs_fill_super(). This adds SB_I_PSEUDO for sysfs, cgroupfs and > resctrl. >=20 > Signed-off-by: Christian Brauner (Amutable) Reviewed-by: Alexander Mikhalitsyn > --- > =C2=A0fs/kernfs/mount.c | 4 ++-- > =C2=A01 file changed, 2 insertions(+), 2 deletions(-) >=20 > diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c > index a0be784bfb06..6b60d212b003 100644 > --- a/fs/kernfs/mount.c > +++ b/fs/kernfs/mount.c > @@ -8,6 +8,7 @@ > =C2=A0 */ > =C2=A0 > =C2=A0#include > +#include > =C2=A0#include > =C2=A0#include > =C2=A0#include > @@ -298,8 +299,6 @@ static int kernfs_fill_super(struct super_block > *sb, struct kernfs_fs_context *k > =C2=A0 struct dentry *root; > =C2=A0 > =C2=A0 info->sb =3D sb; > - /* Userspace would break if executables or devices appear on > sysfs */ > - sb->s_iflags |=3D SB_I_NOEXEC | SB_I_NODEV; > =C2=A0 sb->s_blocksize =3D PAGE_SIZE; > =C2=A0 sb->s_blocksize_bits =3D PAGE_SHIFT; > =C2=A0 sb->s_magic =3D kfc->magic; > @@ -388,6 +387,7 @@ int kernfs_get_tree(struct fs_context *fc) > =C2=A0 info->ns =3D kfc->ns_tag; > =C2=A0 INIT_LIST_HEAD(&info->node); > =C2=A0 > + fc_init_pseudo(fc); > =C2=A0 fc->s_fs_info =3D info; > =C2=A0 sb =3D sget_fc(fc, kernfs_test_super, kernfs_set_super); > =C2=A0 if (IS_ERR(sb))