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Commit 4357fb57 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarNathan Zimmer <nzimmer@sgi.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent f6161aa1

Documentation/RCU/whatisRCU.txt

+2 −2
Original line number Diff line number Diff line
@@ -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