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Date:   Sun, 21 Aug 2022 23:38:08 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Davidlohr Bueso <dave@stgolabs.net>
Cc:     linux-arch@vger.kernel.org, dan.j.williams@intel.com,
        peterz@infradead.org, mark.rutland@arm.com, dave.jiang@intel.com,
        Jonathan.Cameron@huawei.com, a.manzanares@samsung.com,
        bwidawsk@kernel.org, alison.schofield@intel.com,
        ira.weiny@intel.com, linux-cxl@vger.kernel.org,
        nvdimm@lists.linux.dev, x86@kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] arch/cacheflush: Introduce flush_all_caches()
Message-ID: <YwMkUMiKf3ZyMDDF@infradead.org>
References: <20220819171024.1766857-1-dave@stgolabs.net>
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On Fri, Aug 19, 2022 at 10:10:24AM -0700, Davidlohr Bueso wrote:
> index b192d917a6d0..ac4d4fd4e508 100644
> --- a/arch/x86/include/asm/cacheflush.h
> +++ b/arch/x86/include/asm/cacheflush.h
> @@ -10,4 +10,8 @@
>  
>  void clflush_cache_range(void *addr, unsigned int size);
>  
> +/* see comments in the stub version */
> +#define flush_all_caches() \
> +	do { wbinvd_on_all_cpus(); } while(0)

Yikes.  This is just a horrible, horrible name and placement for a bad
hack that should have no generic relevance.

Please fix up the naming to make it clear that this function is for a
very specific nvdimm use case, and move it to a nvdimm-specific header
file.