Re: [PATCH tip/core/rcu 1/1] rcu: Variable name changed in tree_plugin.h and used in tree.c

["Paul E. McKenney" <paulmck@linux.vnet.ibm.com>]

On Wed, May 14, 2014 at 08:41:50AM -0700, Josh Triplett wrote:
> On Tue, May 13, 2014 at 05:30:59PM -0700, Paul E. McKenney wrote:
> > From: Uma Sharma <uma.sharma523@gmail.com>
> > 
> > The variable and struct both having the name "rcu_state" confuses
> > sparse in some situations, so this commit changes the variable to
> > "rcu_state_p" in order to avoid this confusion.  This also makes
> > things easier for human readers.
> 
> Human readers aside, how does Sparse get confused?  Let's fix that.

OK.  The issue appears to be that we have a variable with the same
name as a struct, as in:

struct rcu_state *rcu_state;

Of course, now I don't recall the details or the kernel version, other
than that the name change cleared things up.  :-/

> Personally, I don't think the _p makes things particularly easier for
> human readers, but it doesn't make things *harder* for anyone other than
> those used to reading the existing code, so, *shrug*.

It does make it a bit easier for me when grepping through the source,
given the large number of "struct rcu_state" strings in there.  And
yes, I should be using some more modern tools than "grep" and "cscope"!
But I am not the only throwback.  ;-)

							Thanx, Paul