[PATCH 2/2] pidns 2/2: rewrite copy_pid_ns()

[Sukadev Bhattiprolu]

Alexey Dobriyan [adobriyan at gmail.com] wrote:
| copy_pid_ns() is a perfect example of a case where unwinding leads to more
| code and makes it less clear. Watch the diffstat.

Yes, its cleaner this way :-)

| 
| Signed-off-by: Alexey Dobriyan <adobriyan at gmail.com>

Acked-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>

| ---
|  kernel/pid_namespace.c |   18 +++---------------
|  1 files changed, 3 insertions(+), 15 deletions(-)
| 
| diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
| index 495d5de..821722a 100644
| --- a/kernel/pid_namespace.c
| +++ b/kernel/pid_namespace.c
| @@ -116,23 +116,11 @@ static void destroy_pid_namespace(struct pid_namespace *ns)
| 
|  struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old_ns)
|  {
| -	struct pid_namespace *new_ns;
| -
| -	BUG_ON(!old_ns);
| -	new_ns = get_pid_ns(old_ns);
|  	if (!(flags & CLONE_NEWPID))
| -		goto out;
| -
| -	new_ns = ERR_PTR(-EINVAL);
| +		return get_pid_ns(old_ns);
|  	if (flags & CLONE_THREAD)
| -		goto out_put;
| -
| -	new_ns = create_pid_namespace(old_ns);
| -
| -out_put:
| -	put_pid_ns(old_ns);
| -out:
| -	return new_ns;
| +		return ERR_PTR(-EINVAL);
| +	return create_pid_namespace(old_ns);
|  }
| 
|  void free_pid_ns(struct kref *kref)
| --
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