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[Qemu-devel] [PATCH 1/2] docs/rcu: Distinguish rcu_dereference and atomi
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From: |
Pranith Kumar |
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Subject: |
[Qemu-devel] [PATCH 1/2] docs/rcu: Distinguish rcu_dereference and atomic_rcu_read |
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Date: |
Tue, 18 Oct 2016 10:56:19 -0400 |
Signed-off-by: Pranith Kumar <address@hidden>
---
docs/rcu.txt | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/docs/rcu.txt b/docs/rcu.txt
index c84e7f4..c177dcb 100644
--- a/docs/rcu.txt
+++ b/docs/rcu.txt
@@ -197,7 +197,9 @@ DIFFERENCES WITH LINUX
critical section to become an updater.
- atomic_rcu_read and atomic_rcu_set replace rcu_dereference and
- rcu_assign_pointer. They take a _pointer_ to the variable being accessed.
+ rcu_assign_pointer. Note that although both atomic_rcu_read and
+ rcu_dereference take a _pointer_ to the variable being accessed,
+ atomic_rcu_read dereferences the pointer whereas rcu_dereference does not.
- call_rcu is a macro that has an extra argument (the name of the first
field in the struct, which must be a struct rcu_head), and expects the
--
2.10.1