torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-22 15:36:55 +08:00
Code Issues Packages Projects Releases Wiki Activity

seqlock: Change do_io_accounting() to use scoped_seqlock_read()

Browse Source 
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>
This commit is contained in:
Oleg Nesterov
2025-10-08 14:31:05 +02:00
committed by Peter Zijlstra
parent b76f72bea2
commit 795aab353d
1 changed files with 3 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
fs/proc/base.c
View File

@@ -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;
}