Commit 5e8067ad authored Apr 17, 2010 by Mathieu Desnoyers Committed by Paul E. McKenney Aug 19, 2010

rcu head remove init



RCU heads really don't need to be initialized. Their state before call_rcu()
really does not matter.

We need to keep init/destroy_rcu_head_on_stack() though, since we want
debugobjects to be able to keep track of these objects.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: David S. Miller <davem@davemloft.net>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: akpm@linux-foundation.org
CC: mingo@elte.hu
CC: laijs@cn.fujitsu.com
CC: dipankar@in.ibm.com
CC: josh@joshtriplett.org
CC: dvhltc@us.ibm.com
CC: niv@us.ibm.com
CC: tglx@linutronix.de
CC: peterz@infradead.org
CC: rostedt@goodmis.org
CC: Valdis.Kletnieks@vt.edu
CC: dhowells@redhat.com
CC: eric.dumazet@gmail.com
CC: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

parent 4d2deb40

include/linux/rcupdate.h

+0 −6

Original line number	Diff line number	Diff line
		@@ -75,12 +75,6 @@ extern void rcu_init(void);
		#error "Unknown RCU implementation specified to kernel configuration"
		#endif

		#define RCU_HEAD_INIT { .next = NULL, .func = NULL }
		#define RCU_HEAD(head) struct rcu_head head = RCU_HEAD_INIT
		#define INIT_RCU_HEAD(ptr) do { \
		(ptr)->next = NULL; (ptr)->func = NULL; \
		} while (0)

		/*
		* init_rcu_head_on_stack()/destroy_rcu_head_on_stack() are needed for dynamic
		* initialization and destruction of rcu_head on the stack. rcu_head structures

Admin message