linux-kernel - Re: [PATCH -rt 1/8] introduce PICK

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Date:	Tue, 28 Aug 2007 16:54:32 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	mingo@...e.hu, mingo@...hat.com, linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH -rt 1/8] introduce PICK_FUNCTION

On Wed, 2007-08-29 at 09:44 +1000, Nick Piggin wrote:
> Daniel Walker wrote:
> > PICK_FUNCTION() is similar to the other PICK_OP style macros, and was
> > created to replace them all. I used variable argument macros to handle
> > PICK_FUNC_2ARG/PICK_FUNC_1ARG. Otherwise the marcos are similar to the
> > original macros used for semaphores. The entire system is used to do a
> > compile time switch between two different locking APIs. For example,
> > real spinlocks (raw_spinlock_t) and mutexes (or sleeping spinlocks).
> > 
> > This new macro replaces all the duplication from lock type to lock type.
> > The result of this patch, and the next two, is a fairly nice simplification,
> > and consolidation. Although the seqlock changes are larger than the originals
> > I think over all the patchset is worth while.
> > 
> > Incorporated peterz's suggestion to not require TYPE_EQUAL() to only
> > use pointers.
> 
> How come this is cc'ed to lkml? Is it something that is relevant to
> the mainline kernel... or?

The real time changes are usually developed on lkml , that's how it's
been in the past. I personally like CC'ing lkml since real time can
sometimes touch lots of different subsystems .. So it good to have a
diverse set of people reviewing ..

Daniel

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