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Date:   Tue, 30 Mar 2021 22:36:37 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Andrey Konovalov <andreyknvl@google.com>
Cc:     Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Alexander Potapenko <glider@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Arnd Bergmann <arnd@arndb.de>,
        kasan-dev <kasan-dev@googlegroups.com>,
        Linux Memory Management List <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        wsd_upstream <wsd_upstream@mediatek.com>,
        "moderated list:ARM/Mediatek SoC..." 
        <linux-mediatek@lists.infradead.org>,
        Walter Wu <walter-zh.wu@mediatek.com>
Subject: Re: [PATCH v4] kasan: remove redundant config option
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On Mon, 29 Mar 2021 16:54:26 +0200 Andrey Konovalov <andreyknvl@google.com> wrote:

> Looks like my patch "kasan: fix KASAN_STACK dependency for HW_TAGS"
> that was merged into 5.12-rc causes a build time warning:
> 
> include/linux/kasan.h:333:30: warning: 'CONFIG_KASAN_STACK' is not
> defined, evaluates to 0 [-Wundef]
> #if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK
> 
> The fix for it would either be reverting the patch (which would leave
> the initial issue unfixed) or applying this "kasan: remove redundant
> config option" patch.
> 
> Would it be possible to send this patch (with the fix-up you have in
> mm) for the next 5.12-rc?
> 
> Here are the required tags:
> 
> Fixes: d9b571c885a8 ("kasan: fix KASAN_STACK dependency for HW_TAGS")
> Cc: stable@vger.kernel.org

Got it, thanks.  I updated the changelog to mention the warning fix and
moved these ahead for a -rc merge.