tree 5245232b443036a68ffb2cccdadd797678aeb0c7
parent 1d1fb395f6dbc07b36285bbedcf01a73b57f7cb5
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1337207025 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1341257662 -0700

rcu: Add a gcc-style structure initializer for RCU pointers

RCU_INIT_POINTER() returns a value that is never used, and which should
be abolished due to terminal ugliness:

	q = RCU_INIT_POINTER(global_p, p);

However, there are two uses that cannot be handled by a do-while
formulation because they do gcc-style initialization:

	RCU_INIT_POINTER(.real_cred, &init_cred),
	RCU_INIT_POINTER(.cred, &init_cred),

This usage is clever, but not necessarily the nicest approach.
This commit therefore creates an RCU_POINTER_INITIALIZER() macro that
is specifically designed for gcc-style initialization.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>