Commit 13b7bc60 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Andrew Morton
Browse files

getrusage: use __for_each_thread() 

do/while_each_thread should be avoided when possible.

Plus this change allows to avoid lock_task_sighand(), we can use rcu
and/or sig->stats_lock instead.

Link: https://lkml.kernel.org/r/20230909172629.GA20454@redhat.com


Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c7ac8231

kernel/sys.c

+1 −3
Original line number Diff line number Diff line
@@ -1830,10 +1830,8 @@ void getrusage(struct task_struct *p, int who, struct rusage *r) 
		r->ru_oublock += sig->oublock;

		if (maxrss < sig->maxrss)

			maxrss = sig->maxrss;

		t = p;

		do {

		__for_each_thread(sig, t)

			accumulate_thread_rusage(t, r);

		} while_each_thread(p, t);

		break;



	default: