Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH 5.4 41/51] getrusage: use __for_each_thread() | Date | Wed, 13 Mar 2024 13:02:02 -0400 |
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From: Oleg Nesterov <oleg@redhat.com>
[ Upstream commit 13b7bc60b5353371460a203df6c38ccd38ad7a3a ]
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> Stable-dep-of: f7ec1cd5cc7e ("getrusage: use sig->stats_lock rather than lock_task_sighand()") Signed-off-by: Sasha Levin <sashal@kernel.org> --- kernel/sys.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/kernel/sys.c b/kernel/sys.c index b53ad9e50e465..4a5b03ad6e9b4 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1755,10 +1755,8 @@ 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: -- 2.43.0
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