linux-kernel - Re: [PATCH] ia64: fix min_low_pfn/max_low

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Date:   Tue, 1 Sep 2020 07:19:02 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     Tony Luck <tony.luck@...el.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Fenghua Yu <fenghua.yu@...el.com>, linux-ia64@...r.kernel.org
Subject: Re: [PATCH] ia64: fix min_low_pfn/max_low_pfn build errors

Tony,

I can take it via the memblock tree, would appreciate an Ack.

On Fri, Aug 28, 2020 at 05:01:26PM -0700, Randy Dunlap wrote:
> Fix min_low_pfn/max_low_pfn build errors for arch/ia64/: (e.g.)
> 
>  ERROR: "max_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined!
>  ERROR: "min_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined!
>  ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
>  ERROR: "max_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
>  ERROR: "min_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined!
>  ERROR: "max_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined!
>  ERROR: "max_low_pfn" [drivers/md/dm-integrity.ko] undefined!
>  ERROR: "min_low_pfn" [drivers/md/dm-integrity.ko] undefined!
>  ERROR: "max_low_pfn" [crypto/tcrypt.ko] undefined!
>  ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined!
>  ERROR: "min_low_pfn" [security/keys/encrypted-keys/encrypted-keys.ko] undefined!
>  ERROR: "max_low_pfn" [security/keys/encrypted-keys/encrypted-keys.ko] undefined!
>  ERROR: "min_low_pfn" [arch/ia64/kernel/mca_recovery.ko] undefined!
>  ERROR: "max_low_pfn" [arch/ia64/kernel/mca_recovery.ko] undefined!
> 
> David suggested just exporting min_low_pfn & max_low_pfn in
> mm/memblock.c:
> https://lore.kernel.org/lkml/alpine.DEB.2.22.394.2006291911220.1118534@chino.kir.corp.google.com/
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: linux-mm@...ck.org
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Rientjes <rientjes@...gle.com>
> Cc: Mike Rapoport <rppt@...ux.ibm.com>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: linux-ia64@...r.kernel.org
> ---
>  arch/ia64/kernel/ia64_ksyms.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- linux-next-20200825.orig/arch/ia64/kernel/ia64_ksyms.c
> +++ linux-next-20200825/arch/ia64/kernel/ia64_ksyms.c
> @@ -3,7 +3,7 @@
>   * Architecture-specific kernel symbols
>   */
>  
> -#ifdef CONFIG_VIRTUAL_MEM_MAP
> +#if defined(CONFIG_VIRTUAL_MEM_MAP) || defined(CONFIG_DISCONTIGMEM)
>  #include <linux/compiler.h>
>  #include <linux/export.h>
>  #include <linux/memblock.h>

-- 
Sincerely yours,
Mike.