diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2025-10-08 14:31:05 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-10-21 12:31:57 +0200 |
| commit | 795aab353d0650b2d04dc3aa2e22a51000cb2aaa (patch) | |
| tree | eb846c868a058c65d66422fdd0b8974da656f8ae | |
| parent | b76f72bea2c601afec81829ea427fc0d20f83216 (diff) | |
seqlock: Change do_io_accounting() to use scoped_seqlock_read()
To simplify the code and make it more readable.
[peterz: change to new interface]
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
| -rw-r--r-- | fs/proc/base.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 6299878e3d97..407b41cb6e7c 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3043,21 +3043,14 @@ static int do_io_accounting(struct task_struct *task, struct seq_file *m, int wh if (whole) { struct signal_struct *sig = task->signal; struct task_struct *t; - unsigned int seq = 1; - unsigned long flags; - - rcu_read_lock(); - do { - seq++; /* 2 on the 1st/lockless path, otherwise odd */ - flags = read_seqbegin_or_lock_irqsave(&sig->stats_lock, &seq); + guard(rcu)(); + scoped_seqlock_read (&sig->stats_lock, ss_lock_irqsave) { acct = sig->ioac; __for_each_thread(sig, t) task_io_accounting_add(&acct, &t->ioac); - } while (need_seqretry(&sig->stats_lock, seq)); - done_seqretry_irqrestore(&sig->stats_lock, seq, flags); - rcu_read_unlock(); + } } else { acct = task->ioac; } |