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Date:   Sat, 22 Oct 2022 16:33:56 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     kernel test robot <lkp@intel.com>
Cc:     Dan Williams <dan.j.williams@intel.com>, llvm@lists.linux.dev,
        kbuild-all@lists.01.org, Ammar Faizi <ammarfaizi2@gnuweeb.org>,
        GNU/Weeb Mailing List <gwml@vger.gnuweeb.org>,
        linux-kernel@vger.kernel.org,
        Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [ammarfaizi2-block:akpm/mm/mm-unstable 146/162]
 include/linux/memremap.h:258:9: error: expression which evaluates to zero
 treated as a null pointer constant of type 'struct folio *'
Message-Id: <20221022163356.f5e08eeefe66fc71845be861@linux-foundation.org>
In-Reply-To: <202210221343.e50d98Ht-lkp@intel.com>
References: <202210221343.e50d98Ht-lkp@intel.com>
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On Sat, 22 Oct 2022 13:27:19 +0800 kernel test robot <lkp@intel.com> wrote:

>    In file included from include/linux/mm.h:31:
> >> include/linux/memremap.h:258:9: error: expression which evaluates to zero treated as a null pointer constant of type 'struct folio *' [-Werror,-Wnon-literal-null-conversion]
>            return false;

Thanks.  Doh.

--- a/include/linux/memremap.h~mm-memremap-introduce-pgmap_request_folio-using-pgmap-offsets-fix
+++ a/include/linux/memremap.h
@@ -255,7 +255,7 @@ static inline struct dev_pagemap *get_de
 static inline struct folio *pgmap_request_folio(struct dev_pagemap *pgmap,
 						pgoff_t pgmap_offset, int order)
 {
-	return false;
+	return NULL;
 }
 
 static inline bool pgmap_pfn_valid(struct dev_pagemap *pgmap, unsigned long pfn)
_