Change first_tid() to use while_each_thread() instead of
next_thread().
This doesn't make the code simpler/better, but we are going
to fix or replace while_each_thread(), next_thread() should
be avoided whenever possible.
Signed-off-by: Oleg Nesterov <o...@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 c939c9f..bed1096 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3186,24 +3186,24 @@ static struct task_struct *first_tid(struct task_struct
*leader,
goto found;
}
- pos = NULL;
/* If nr exceeds the number of threads there is nothing todo */
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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