linux-kernel - Re: [PATCH 2/6] x86: clean up conditional pmem includes

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Date:	Thu, 6 Aug 2015 23:39:16 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, linux-nvdimm@...1.01.org,
	dan.j.williams@...el.com, Juergen Gross <jgross@...e.com>,
	x86@...nel.org, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/6] x86: clean up conditional pmem includes

On Thu, Aug 06, 2015 at 11:43:16AM -0600, Ross Zwisler wrote:
> Prior to this change x86_64 used the pmem defines in
> arch/x86/include/asm/cacheflush.h, and UM used the default ones at the
> top of include/linux/pmem.h.  The inclusion or exclusion in pmem.h was
> controlled by CONFIG_ARCH_HAS_PMEM_API, but the ones in cacheflush.h
> were controlled by ARCH_HAS_NOCACHE_UACCESS.
> 
> Instead, control them both with CONFIG_ARCH_HAS_PMEM_API so that it's
> clear that they are related and we don't run into the possibility where
> they are both included or excluded.  Also remove a bunch of stale
> function prototypes meant for UM in cacheflush.h - these just conflicted
> with the inline defaults in pmem.h, and gave compile errors:

This looks reasonable, but can you use the opportunity to also move
the pmem arch inlines from asm/cacheflush.h to a new asm/pmem.h?
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