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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: Oleg Nesterov <oleg@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -1830,10 +1830,8 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
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r->ru_oublock += sig->oublock;
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if (maxrss < sig->maxrss)
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maxrss = sig->maxrss;
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t = p;
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do {
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__for_each_thread(sig, t)
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accumulate_thread_rusage(t, r);
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} while_each_thread(p, t);
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break;
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default:
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