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rcu: Make bugginess of code sample more evident 

One of the code samples in whatisRCU.txt shows a bug, but someone scanning
the document quickly might mistake it for a valid use of RCU.  Add some
screaming comments to help keep speed-readers on track.

Reported-by: Nathan Zimmer <nzimmer@sgi.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Paul E. McKenney 2013-02-12 07:56:27 -08:00
parent f6161aa153
commit 4357fb570b
1 changed files with 2 additions and 2 deletions
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4
Documentation/RCU/whatisRCU.txt
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@ -265,9 +265,9 @@ rcu_dereference()
rcu_read_lock();
p = rcu_dereference(head.next);
rcu_read_unlock();
x = p->address;
x = p->address; /* BUG!!! */
rcu_read_lock();
y = p->data;
y = p->data; /* BUG!!! */
rcu_read_unlock();
Holding a reference from one RCU read-side critical section