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Message-ID: <20190814052342.GB7545@infradead.org>
Date:   Tue, 13 Aug 2019 22:23:42 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, npiggin@...il.com,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 08/10] powerpc/mm: move __ioremap_at() and
 __iounmap_at() into ioremap.c

> +/**
> + * __iounmap_from - Low level function to tear down the page tables
> + *                  for an IO mapping. This is used for mappings that
> + *                  are manipulated manually, like partial unmapping of
> + *                  PCI IOs or ISA space.
> + */
> +void __iounmap_at(void *ea, unsigned long size)

The comment doesn't mention the function name.  That's why I ususally
don't even add the function name so that it doesn't get out of sync.

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