diff mbox series

[2/3,v4,bpf-next] bpf: Use thread_group_leader()

Message ID 20201218185032.2464558-3-jonathan.lemon@gmail.com
State New
Headers show
Series bpf: increment and use correct thread iterator | expand

Commit Message

Jonathan Lemon Dec. 18, 2020, 6:50 p.m. UTC 
From: Jonathan Lemon <bsd@fb.com>

Instead of directly comparing task->tgid and task->pid, use the
thread_group_leader() helper.  This helps with readability, and
there should be no functional change.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
---
 kernel/bpf/task_iter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Andrii Nakryiko Dec. 18, 2020, 9:02 p.m. UTC | #1 
On Fri, Dec 18, 2020 at 12:47 PM Jonathan Lemon
<jonathan.lemon@gmail.com> wrote:
>
> From: Jonathan Lemon <bsd@fb.com>
>
> Instead of directly comparing task->tgid and task->pid, use the
> thread_group_leader() helper.  This helps with readability, and
> there should be no functional change.
>
> Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
> ---

Acked-by: Andrii Nakryiko <andrii@kernel.org>

>  kernel/bpf/task_iter.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
> index 8033ab19138a..dc4007f1843b 100644
> --- a/kernel/bpf/task_iter.c
> +++ b/kernel/bpf/task_iter.c
> @@ -37,7 +37,7 @@ static struct task_struct *task_seq_get_next(struct pid_namespace *ns,
>                 if (!task) {
>                         ++*tid;
>                         goto retry;
> -               } else if (skip_if_dup_files && task->tgid != task->pid &&
> +               } else if (skip_if_dup_files && !thread_group_leader(task) &&
>                            task->files == task->group_leader->files) {
>                         put_task_struct(task);
>                         task = NULL;
> --
> 2.24.1
>
diff mbox series

Patch

diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index 8033ab19138a..dc4007f1843b 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -37,7 +37,7 @@  static struct task_struct *task_seq_get_next(struct pid_namespace *ns,
 		if (!task) {
 			++*tid;
 			goto retry;
-		} else if (skip_if_dup_files && task->tgid != task->pid &&
+		} else if (skip_if_dup_files && !thread_group_leader(task) &&
 			   task->files == task->group_leader->files) {
 			put_task_struct(task);
 			task = NULL;