From: David Laight <David.Laight@ACULAB.COM>
To: 'Petko Manolov' <petko.manolov@konsulko.com>,
"Paul E . McKenney" <paulmck@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: RE: [RFC] WRITE_ONCE_INC() and friends
Date: Sun, 19 Apr 2020 18:02:50 +0000 [thread overview]
Message-ID: <491f0b0bc9e4419d93a78974fd7f44c7@AcuMS.aculab.com> (raw)
In-Reply-To: <20200419094439.GA32841@carbon>
From: Petko Manolov
> Sent: 19 April 2020 10:45
> Recently I started reading up on KCSAN and at some point I ran into stuff like:
>
> WRITE_ONCE(ssp->srcu_lock_nesting[idx], ssp->srcu_lock_nesting[idx] + 1);
> WRITE_ONCE(p->mm->numa_scan_seq, READ_ONCE(p->mm->numa_scan_seq) + 1);
If all the accesses use READ/WRITE_ONCE() why not just mark the
structure field 'volatile'?
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2020-04-19 18:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-19 9:44 Petko Manolov
2020-04-19 18:02 ` David Laight [this message]
2020-04-19 18:29 ` Petko Manolov
2020-04-19 21:37 ` David Laight
2020-04-20 15:05 ` Paul E. McKenney
2020-04-20 16:32 ` Petko Manolov
2020-04-21 8:00 ` David Laight
2020-04-21 9:30 ` Petko Manolov
2020-04-20 22:57 ` Marco Elver
2020-04-20 23:12 ` Paul E. McKenney
2020-04-21 9:33 ` Marco Elver
2020-04-21 13:19 ` Paul E. McKenney
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