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Message-Id: <201210160925.11891.arnd@arndb.de>
Date:	Tue, 16 Oct 2012 09:25:11 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Catalin Marinas <catalin.marinas@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Howells <dhowells@...hat.com>
Subject: Re: [RFC PATCH 1/5] irq_work: Move irq_work_raise() declaration/default definition to arch headers

On Tuesday 16 October 2012, Mark Brown wrote:
> On Tue, Oct 16, 2012 at 12:18:05AM +0200, Frederic Weisbecker wrote:
> 
> I came up with stuff for it, though it needed prettyfying.
> 
> > This seems to do the trick:
> 
> > (It's the diff result of ln -s asm-generic include/asm)

Unfortunately, this is not enough, it breaks "make headers_install",
which now needs to decide whether to install a header that is present
in the architecture directory, or to copy one from the asm-generic
directory otherwise.

On the plus side, the symlink breaks checking into CVS and cross-building
from operating systems that don't support posix file systems, so we
might want to do this anyway. ;-)

> That'd work, but I assume there is some reason why we've got this system
> of explicitly adding each file.  It's not like cpp can test for the
> presence of include files.  If we can't figure out why we're not doing
> this I'd propose we start.

We discussed renaming asm-generic to asm before, but some people objected
to the use of #include_next. There is a smaller problem with opening the
asm/*.h namespace to header files that are not relevant for architctures,
so I'd prefer to have a well-defined list of headers that are implicitly
shared, but it's not a technical argument.

	Arnd
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