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Sat, 14 Nov 2026 13:06:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794661571; bh=JKEebM2B/rTWfHQRxsgcjHqOhGI+gUjJB4wKvnue758=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=HWC8lhcRxYRCVLn3TpoIzDZ0r6knLI/+VKra9y0LMZUdf9y2SW8kRjug2+6ll4TFw sFMjM36I+HTVQCiYKOXtD3DCl934UGrWmg6qnVTWAkdS8Qs4hfZxLEQ5cd0s8oJ9C9 fUhCdYxXyKWUMiBhpguIoYbC0o3ATeajksXbxx0xoSufrfGJhGbAI/UAksPOhTc/HT K2qcgoXt7i4qs6W+rhzztnxXhcqqn/HrLZCQg2St4BiABC53+ogrC53+NpAn2uKl/P uu8arH/6EFYPXQYJcwPTBER+wepJOnNDlC6o2SSf6lebRTXyPpqWofrAf4PX4YP6mn uEvTMIXHZBFPw== From: Christian Brauner Date: Sat, 14 Nov 2026 14:01:46 +0100 Subject: [PATCH RFC v2 05/42] kernfs: use fc_init_pseudo() X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261114-work-loop-pseudo-v2-5-98639a2286fb@kernel.org> References: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> In-Reply-To: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> To: 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, "Christian Brauner (Amutable)" , Alexander Mikhalitsyn X-Mailer: b4 0.17-dev-ce4c1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1449; i=brauner@kernel.org; h=from:subject:message-id; bh=ir2ppogbuqLEOPNYev9c+66l6T/T0A3wuXIOqOu3yTk=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT9iMl+Jvtl/aO5Ua4ZJd1uQa9EV+geipFK+mptcsVm/ q0Yo1fBHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABNp72BkWP7iOsveCMP+z1P2 GCRNU/Nzrztw1ed3WOnr6aEc868WTGVkuF6+JnT7X6/USnPOeU/ZmFOmTf/1ZgfTrUK/ZbdrryW 2MAIA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 X-Mailman-Approved-At: Sat, 14 Nov 2026 05:56:41 -0800 X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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. Reviewed-by: Jan Kara Reviewed-by: Christoph Hellwig Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner (Amutable) --- fs/kernfs/mount.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index a0be784bfb064..6b60d212b003d 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -8,6 +8,7 @@ */ #include +#include #include #include #include @@ -298,8 +299,6 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k struct dentry *root; info->sb = sb; - /* Userspace would break if executables or devices appear on sysfs */ - sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV; sb->s_blocksize = PAGE_SIZE; sb->s_blocksize_bits = PAGE_SHIFT; sb->s_magic = kfc->magic; @@ -388,6 +387,7 @@ int kernfs_get_tree(struct fs_context *fc) info->ns = kfc->ns_tag; INIT_LIST_HEAD(&info->node); + fc_init_pseudo(fc); fc->s_fs_info = info; sb = sget_fc(fc, kernfs_test_super, kernfs_set_super); if (IS_ERR(sb)) -- 2.53.0