This seems to be a hack to work around a race in p->state. Don't see this check in other implementations.
On 2020-12-17 11:57 a.m., Helge Deller wrote:
> Signed-off-by: Helge Deller <deller@xxxxxx>
>
> diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
> index a92a23d6acd9..fda1c1a6a444 100644
> --- a/arch/parisc/kernel/process.c
> +++ b/arch/parisc/kernel/process.c
> @@ -260,6 +260,8 @@ get_wchan(struct task_struct *p)
> do {
> if (unwind_once(&info) < 0)
> return 0;
> + if (p->state == TASK_RUNNING)
> + return 0;
> ip = info.ip;
> if (!in_sched_functions(ip))
> return ip;
Dave
--
John David Anglin dave.anglin@xxxxxxxx
