Messages in this thread Patch in this message | | | Date | Wed, 20 Nov 2013 19:30:24 +0100 | From | Oleg Nesterov <> | Subject | [PATCH 2/4] proc: change first_tid() to use while_each_thread() rather than next_thread() |
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Rerwrite the main loop to use while_each_thread() instead of next_thread(). We are going to fix or replace while_each_thread(), next_thread() should be avoided whenever possible.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> --- fs/proc/base.c | 20 ++++++++++---------- 1 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c index da12c5c..7ab3785 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3100,23 +3100,23 @@ static struct task_struct *first_tid(struct task_struct *leader, } /* If nr exceeds the number of threads there is nothing todo */ - pos = NULL; if (nr && nr >= get_nr_threads(leader)) - goto out; + goto fail; /* It could be unhashed before we take rcu lock */ if (!pid_alive(leader)) - goto out; + goto fail; /* If we haven't found our starting place yet start * with the leader and walk nr threads forward. */ - for (pos = leader; nr > 0; --nr) { - pos = next_thread(pos); - if (pos == leader) { - pos = NULL; - goto out; - } - } + pos = leader; + do { + if (nr-- <= 0) + goto found; + } while_each_thread(leader, pos); +fail: + pos = NULL; + goto out; found: get_task_struct(pos); out: -- 1.5.5.1
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