linux-kernel - Re: [PATCH 1/2] mm: kmsan: handle alloc failures in kmsan_vmap_pages_range

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Date:   Wed, 12 Apr 2023 14:06:01 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Alexander Potapenko <glider@...gle.com>, llvm@...ts.linux.dev,
        oe-kbuild-all@...ts.linux.dev, urezki@...il.com, hch@...radead.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, elver@...gle.com,
        dvyukov@...gle.com, kasan-dev@...glegroups.com,
        Dipanjan Das <mail.dipanjan.das@...il.com>
Subject: Re: [PATCH 1/2] mm: kmsan: handle alloc failures in
 kmsan_vmap_pages_range_noflush()

On Thu, 13 Apr 2023 02:27:19 +0800 kernel test robot <lkp@...el.com> wrote:

> Hi Alexander,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on akpm-mm/mm-everything]
> 
> >> include/linux/kmsan.h:291:1: error: non-void function does not return a value [-Werror,-Wreturn-type]

Thanks, I'll do this:

--- a/include/linux/kmsan.h~mm-kmsan-handle-alloc-failures-in-kmsan_ioremap_page_range-fix
+++ a/include/linux/kmsan.h
@@ -289,6 +289,7 @@ static inline int kmsan_vmap_pages_range
 						 struct page **pages,
 						 unsigned int page_shift)
 {
+	return 0;
 }
 
 static inline void kmsan_vunmap_range_noflush(unsigned long start,
_