linux-kernel - [PATCH 08/11] fork: allow kernel code to call copy

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Message-Id: <20230310220332.5309-9-michael.christie@oracle.com>
Date:   Fri, 10 Mar 2023 16:03:29 -0600
From:   Mike Christie <michael.christie@...cle.com>
To:     hch@...radead.org, stefanha@...hat.com, jasowang@...hat.com,
        mst@...hat.com, sgarzare@...hat.com,
        virtualization@...ts.linux-foundation.org, brauner@...nel.org,
        ebiederm@...ssion.com, torvalds@...ux-foundation.org,
        konrad.wilk@...cle.com, linux-kernel@...r.kernel.org
Cc:     Mike Christie <michael.christie@...cle.com>
Subject: [PATCH 08/11] fork: allow kernel code to call copy_process

The next patch adds helpers like create_io_thread, but for use by the
vhost layer. There are several functions, so they are in their own file
instead of cluttering up fork.c. This patch allows that new file to
call copy_process.

Signed-off-by: Mike Christie <michael.christie@...cle.com>
Acked-by: Michael S. Tsirkin <mst@...hat.com>
---
 include/linux/sched/task.h | 2 ++
 kernel/fork.c              | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 00c54bfac0b5..537cbf9a2ade 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -93,6 +93,8 @@ extern void exit_files(struct task_struct *);
 extern void exit_itimers(struct task_struct *);
 
 extern pid_t kernel_clone(struct kernel_clone_args *kargs);
+struct task_struct *copy_process(struct pid *pid, int trace, int node,
+				 struct kernel_clone_args *args);
 struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node);
 struct task_struct *fork_idle(int);
 extern pid_t kernel_thread(int (*fn)(void *), void *arg, const char *name,
diff --git a/kernel/fork.c b/kernel/fork.c
index 244aae6c2395..8faf9d0adb3b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2013,7 +2013,7 @@ static void rv_task_fork(struct task_struct *p)
  * parts of the process environment (as per the clone
  * flags). The actual kick-off is left to the caller.
  */
-static __latent_entropy struct task_struct *copy_process(
+__latent_entropy struct task_struct *copy_process(
 					struct pid *pid,
 					int trace,
 					int node,
-- 
2.25.1