[PATCH 5/5] kernel: Convert kthread to use setup_thread_fn

Mike Christie
2023-02-13T01:01:04Z

kthread_setup_struct can now setup the kthread struct and setup the
comm, so remove the call to kthread_setup_struct in copy_process and
have kthread.c set the setup_thread_fn callback, so it works like
io_uring.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
kernel/fork.c | 5 +----
kernel/kthread.c | 1 +
2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index bd60ecc6b29c..7cdd85befa41 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2189,10 +2189,6 @@ static __latent_entropy struct task_struct *copy_process(
p->io_context = NULL;
audit_set_context(p, NULL);
cgroup_fork(p);
- if (args->kthread) {
- if (kthread_setup_struct(p, args->fn_arg))
- goto bad_fork_cleanup_delayacct;
- }
#ifdef CONFIG_NUMA
p->mempolicy = mpol_dup(p->mempolicy);
if (IS_ERR(p->mempolicy)) {
@@ -2598,6 +2594,7 @@ struct task_struct * __init fork_idle(int cpu)
struct task_struct *task;
struct kernel_clone_fns fns = {
.thread_fn = &idle_dummy,
+ .setup_thread_fn = kthread_setup_struct,
};
struct kernel_clone_args args = {
.flags = CLONE_VM,
diff --git a/kernel/kthread.c b/kernel/kthread.c
index b67c2caf2ccb..7776d19789f6 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -429,6 +429,7 @@ int tsk_fork_get_node(struct task_struct *tsk)

static struct kernel_clone_fns thread_clone_fns = {
.thread_fn = kthread,
+ .setup_thread_fn = kthread_setup_struct,
};

static void create_kthread(struct kthread_create_info *create)
--
2.25.1