linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-09-18 22:59:29 +02:00

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Christian Brauner 14adbd5341 fs: stop sharing fs_struct between init_task and pid 1

Spawn kernel_init (PID 1) via kernel_clone() directly instead of
user_mode_thread(), without CLONE_FS. This gives PID 1 its own private
copy of init_task's fs_struct rather than sharing it.

This is a prerequisite for isolating kthreads in nullfs: when
init_task's fs is later pointed at nullfs, PID 1 must not share it
or init_userspace_fs() would modify init_task's fs as well, defeating
the isolation.

At this stage PID 1 still gets rootfs (a private copy rather than a
shared reference), so there is no functional change.

Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-19-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

2026-06-29 10:53:32 +02:00

.gitignore

kbuild: build init/built-in.a just once

2022-09-29 04:40:15 +09:00

.kunitconfig

initramfs_test: kunit tests for initramfs unpacking

2025-03-08 12:13:04 +01:00

calibrate.c

calibrate: update header inclusion

2025-11-27 14:24:45 -08:00

do_mounts_initrd.c

init: remove /proc/sys/kernel/real-root-dev