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Subject: Re: [PATCH] xen/balloon: fix unused-variable warning
To:     Arnd Bergmann <arnd@kernel.org>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Stefano Stabellini <sstabellini@kernel.org>,
        Oscar Salvador <osalvador@suse.de>,
        Pankaj Gupta <pankaj.gupta@cloud.ionos.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        David Hildenbrand <david@redhat.com>,
        xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
References: <20211108111408.3940366-1-arnd@kernel.org>
From:   Juergen Gross <jgross@suse.com>
Message-ID: <4d0f02ec-4a36-34f1-3bfd-3f4758c4eea3@suse.com>
Date:   Mon, 8 Nov 2021 17:24:51 +0100
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From: Juergen Gross <jgross@suse.com>
To: Arnd Bergmann <arnd@kernel.org>,
 Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Stefano Stabellini
 <sstabellini@kernel.org>, Oscar Salvador <osalvador@suse.de>,
 Pankaj Gupta <pankaj.gupta@cloud.ionos.com>,
 Andrew Morton <akpm@linux-foundation.org>,
 David Hildenbrand <david@redhat.com>, xen-devel@lists.xenproject.org,
 linux-kernel@vger.kernel.org
Message-ID: <4d0f02ec-4a36-34f1-3bfd-3f4758c4eea3@suse.com>
Subject: Re: [PATCH] xen/balloon: fix unused-variable warning
References: <20211108111408.3940366-1-arnd@kernel.org>
In-Reply-To: <20211108111408.3940366-1-arnd@kernel.org>

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On 08.11.21 12:14, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>=20
> In configurations with CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=3Dn
> and CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=3Dy, gcc warns about an
> unused variable:
>=20
> drivers/xen/balloon.c:83:12: error: 'xen_hotplug_unpopulated' defined b=
ut not used [-Werror=3Dunused-variable]
>=20
> Since this is always zero when CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
> is disabled, turn it into a preprocessor constant in that case.
>=20
> Fixes: 121f2faca2c0 ("xen/balloon: rename alloc/free_xenballooned_pages=
")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Juergen Gross <jgross@suse.com>


Juergen


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