From: Ahmed S. Darwish a.darwish@linutronix.de
commit cf48647243cc28d15280600292db5777592606c5 upstream.
Sequence counters with an associated write serialization lock are called seqcount_LOCKNAME_t. Fix the documentation accordingly.
While at it, remove a paragraph that inappropriately discussed a seqlock.h implementation detail.
Fixes: 6dd699b13d53 ("seqlock: seqcount_LOCKNAME_t: Standardize naming convention") Signed-off-by: Ahmed S. Darwish a.darwish@linutronix.de Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20201206162143.14387-2-a.darwish@linutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- Documentation/locking/seqlock.rst | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-)
--- a/Documentation/locking/seqlock.rst +++ b/Documentation/locking/seqlock.rst @@ -89,7 +89,7 @@ Read path::
.. _seqcount_locktype_t:
-Sequence counters with associated locks (``seqcount_LOCKTYPE_t``) +Sequence counters with associated locks (``seqcount_LOCKNAME_t``) -----------------------------------------------------------------
As discussed at :ref:`seqcount_t`, sequence count write side critical @@ -115,27 +115,26 @@ The following sequence counters with ass - ``seqcount_mutex_t`` - ``seqcount_ww_mutex_t``
-The plain seqcount read and write APIs branch out to the specific -seqcount_LOCKTYPE_t implementation at compile-time. This avoids kernel -API explosion per each new seqcount LOCKTYPE. +The sequence counter read and write APIs can take either a plain +seqcount_t or any of the seqcount_LOCKNAME_t variants above.
-Initialization (replace "LOCKTYPE" with one of the supported locks):: +Initialization (replace "LOCKNAME" with one of the supported locks)::
/* dynamic */ - seqcount_LOCKTYPE_t foo_seqcount; - seqcount_LOCKTYPE_init(&foo_seqcount, &lock); + seqcount_LOCKNAME_t foo_seqcount; + seqcount_LOCKNAME_init(&foo_seqcount, &lock);
/* static */ - static seqcount_LOCKTYPE_t foo_seqcount = - SEQCNT_LOCKTYPE_ZERO(foo_seqcount, &lock); + static seqcount_LOCKNAME_t foo_seqcount = + SEQCNT_LOCKNAME_ZERO(foo_seqcount, &lock);
/* C99 struct init */ struct { - .seq = SEQCNT_LOCKTYPE_ZERO(foo.seq, &lock), + .seq = SEQCNT_LOCKNAME_ZERO(foo.seq, &lock), } foo;
Write path: same as in :ref:`seqcount_t`, while running from a context -with the associated LOCKTYPE lock acquired. +with the associated write serialization lock acquired.
Read path: same as in :ref:`seqcount_t`.