fs: stop rewriting kthread fs structs

Now that we isolated kthreads filesystem state completely from userspace
stop rewriting their state.

Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-24-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index f44e43ce6d9346aa755c65aa015b665d04a62dbb..2a98cfbedd32c7acd3c1ba3e38deae3e5b14448d 100644 (file)
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -61,6 +61,10 @@ void chroot_fs_refs(const struct path *old_root, const struct path *new_root)
 
        read_lock(&tasklist_lock);
        for_each_process_thread(g, p) {
+               /* leave kthreads alone */
+               if (p->flags & PF_KTHREAD)
+                       continue;
+
                task_lock(p);
                fs = p->real_fs;
                if (fs) {