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author | Michal Marek <mmarek@suse.cz> | 2013-02-25 21:50:05 +0100 |
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committer | Michal Marek <mmarek@suse.cz> | 2013-02-25 21:51:57 +0100 |
commit | e3900e74f26fc924c8e9e2a922bd40369b0bb517 (patch) | |
tree | 6e868575d346032ba9408f350c6e5369e0e52b0d /Documentation/RCU/checklist.txt | |
parent | 62dc989921df2a98d1a73aacd085abe941cb9828 (diff) | |
parent | 02f3e53a131c8aa3fe3c954058f1add5beeae621 (diff) |
Merge branch 'kbuild/rc-fixes' into kbuild/kconfig
There is one kconfig fix in the rc-fixes branch that I forgot to submit
for 3.8, so let's add it to the kconfig branch for 3.9-rc1.
Diffstat (limited to 'Documentation/RCU/checklist.txt')
-rw-r--r-- | Documentation/RCU/checklist.txt | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt index cdb20d41a44..31ef8fe07f8 100644 --- a/Documentation/RCU/checklist.txt +++ b/Documentation/RCU/checklist.txt @@ -271,15 +271,14 @@ over a rather long period of time, but improvements are always welcome! The same cautions apply to call_rcu_bh() and call_rcu_sched(). 9. All RCU list-traversal primitives, which include - rcu_dereference(), list_for_each_entry_rcu(), - list_for_each_continue_rcu(), and list_for_each_safe_rcu(), - must be either within an RCU read-side critical section or - must be protected by appropriate update-side locks. RCU - read-side critical sections are delimited by rcu_read_lock() - and rcu_read_unlock(), or by similar primitives such as - rcu_read_lock_bh() and rcu_read_unlock_bh(), in which case - the matching rcu_dereference() primitive must be used in order - to keep lockdep happy, in this case, rcu_dereference_bh(). + rcu_dereference(), list_for_each_entry_rcu(), and + list_for_each_safe_rcu(), must be either within an RCU read-side + critical section or must be protected by appropriate update-side + locks. RCU read-side critical sections are delimited by + rcu_read_lock() and rcu_read_unlock(), or by similar primitives + such as rcu_read_lock_bh() and rcu_read_unlock_bh(), in which + case the matching rcu_dereference() primitive must be used in + order to keep lockdep happy, in this case, rcu_dereference_bh(). The reason that it is permissible to use RCU list-traversal primitives when the update-side lock is held is that doing so |