linux-kernel - Re: [PATCH v7 6/6] MCS Lock: add Kconfig entries to allow arch-specific hooks

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Message-ID: <20140121094756.GQ31570@twins.programming.kicks-ass.net>
Date:	Tue, 21 Jan 2014 10:47:56 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E.McKenney" <paulmck@...ux.vnet.ibm.com>,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
	linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Waiman Long <waiman.long@...com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Alex Shi <alex.shi@...aro.org>,
	Andi Kleen <andi@...stfloor.org>,
	Michel Lespinasse <walken@...gle.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Matthew R Wilcox <matthew.r.wilcox@...el.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Rik van Riel <riel@...hat.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	George Spelvin <linux@...izon.com>,
	"H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>,
	"Figo.zhang" <figo1802@...il.com>
Subject: Re: [PATCH v7 6/6] MCS Lock: add Kconfig entries to allow
 arch-specific hooks

On Mon, Jan 20, 2014 at 03:31:57PM -0800, Tim Chen wrote:
> On Mon, 2014-01-20 at 13:30 +0100, Peter Zijlstra wrote:

> > Then again, people seem to whinge if you don't keep these Kbuild files
> > sorted, but manually sorting 29 files is just not something I like to
> > do.

> Can you clarify what exactly needs to be sorted?  The Kbuild files
> spit out by git diff appears to be sorted already.

> > diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
> > index f01fb505ad52..14cbbbcec01f 100644
> > --- a/arch/alpha/include/asm/Kbuild
> > +++ b/arch/alpha/include/asm/Kbuild
> > @@ -4,3 +4,4 @@ generic-y += clkdev.h
> >  generic-y += exec.h
> >  generic-y += trace_clock.h
> >  generic-y += preempt.h
> > +generic-y += mcs_spinlock.h

Last time I checked the Alphabet m came before p.

I generated this patch using:

for i in arch/*/include/asm/Kbuild
do
	echo "generic-y += mcs_spinlock.h" >> $i
done

Which simply appends the new header. However people want these generic-y
thingies sorted by header name. Hence the gawk script I sent which does
just that.
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