Re: [PATCH tip/core/rcu 04/14] rcu: Add a gcc-style structureinitializer for RCU pointers

[Josh Triplett]

On Fri, Jun 15, 2012 at 01:13:05PM -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
> 
> 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 INIT_RCU_POINTER() macro that is specifically
> designed for gcc-style initialization.

The concept seems fine, but the names seem entirely non-obvious.
RCU_INIT_POINTER versus INIT_RCU_POINTER?

- Josh Triplett
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