linux-kernel - Re: Is iounmap(NULL) safe or not?

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Date:   Sat, 06 May 2017 09:47:26 +0200
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: Re: Is iounmap(NULL) safe or not?

On Sat, 2017-05-06 at 01:50 +0300, Alexey Khoroshilov wrote:
> Could you please clarify if iounmap(NULL) safe or not.
> I guess it would be less errorprone if the answer is architecture independent.

I think it's supposed to be and we should fix ppc.

Cheers,
Ben.