From 2d9c318bfd15394da014737bee30e7b2e22c5eac Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 21 Apr 2020 19:04:11 +0200 Subject: docs: RCU: Don't duplicate chapter names in rculist_nulls.rst Since changeset 58ad30cf91f0 ("docs: fix reference to core-api/namespaces.rst"), auto-references for chapters are generated. This is a nice feature, but has a drawback: no chapters can have the same sumber. So, we need to add two higher hierarchy chapters on this document, in order to avoid such duplication. Fixes: 58ad30cf91f0 ("docs: fix reference to core-api/namespaces.rst") Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Paul E. McKenney --- Documentation/RCU/rculist_nulls.rst | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation/RCU/rculist_nulls.rst') diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst index d40374221d69..a9fc774bc400 100644 --- a/Documentation/RCU/rculist_nulls.rst +++ b/Documentation/RCU/rculist_nulls.rst @@ -10,6 +10,9 @@ objects using SLAB_TYPESAFE_BY_RCU allocations. Please read the basics in Documentation/RCU/listRCU.rst +Using 'nulls' +============= + Using special makers (called 'nulls') is a convenient way to solve following problem : @@ -126,6 +129,9 @@ very very fast (before the end of RCU grace period) -------------------------------------------------------------------------- +Avoiding extra smp_rmb() +======================== + With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup() and extra smp_wmb() in insert function. -- cgit v1.2.3