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Date: Fri, 20 Aug 2010 08:43:48 +0200
From: Sam Ravnborg <sam@ravnborg.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH 2/2] rwsem: Move powerpc atomic-long based
	implementation to asm-generic
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Cc: Linus Torvalds <torvalds@linux-foundation.org>, paulus@au.ibm.com,
	linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org,
	akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
	David Miller <davem@davemloft.net>
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> diff --git a/include/asm-generic/rwsem-cmpxchg.h b/include/asm-generic/rwsem-cmpxchg.h
> new file mode 100644
> index 0000000..2b1c859
> --- /dev/null
> +++ b/include/asm-generic/rwsem-cmpxchg.h
> @@ -0,0 +1,183 @@
> +#ifndef _RWSEM_CMPXCHG_H
> +#define _RWSEM_CMPXCHG_H
> +
> +#ifndef _LINUX_RWSEM_H
> +#error "Please don't include <asm/rwsem.h> directly, use <linux/rwsem.h> instead."
> +#endif
> +
> +#ifdef __KERNEL__

#ifdef __KERNEL__ is only relevant for exported headers.
For kernel only headers like this is does not make sense,
but it does not harm.

	Sam