linux-kernel - Re: [PATCH v2 2/8] riscv: mm: Change attribute from __init to _

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Date: Tue, 14 May 2024 22:32:43 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Björn Töpel <bjorn@...nel.org>
Cc: Alexandre Ghiti <alexghiti@...osinc.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	David Hildenbrand <david@...hat.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	linux-riscv@...ts.infradead.org,
	Björn Töpel <bjorn@...osinc.com>,
	Andrew Bresticker <abrestic@...osinc.com>,
	Chethan Seshadri <Chethan.Seshadri@...alinasystems.io>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Santosh Mamila <santosh.mamila@...alinasystems.io>,
	Sivakumar Munnangi <siva.munnangi@...alinasystems.io>,
	Sunil V L <sunilvl@...tanamicro.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 2/8] riscv: mm: Change attribute from __init to
 __meminit for page functions

On Tue, May 14, 2024 at 04:04:40PM +0200, Björn Töpel wrote:
> From: Björn Töpel <bjorn@...osinc.com>
> 
> Prepare for memory hotplugging support by changing from __init to
> __meminit for the page table functions that are used by the upcoming
> architecture specific callbacks.
> 
> Changing the __init attribute to __meminit, avoids that the functions
> are removed after init. The __meminit attribute makes sure the
> functions are kept in the kernel text post init, but only if memory
> hotplugging is enabled for the build.
> 
> Also, make sure that the altmap parameter is properly passed on to
> vmemmap_populate_hugepages().
> 
> Signed-off-by: Björn Töpel <bjorn@...osinc.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>

> +static void __meminit create_linear_mapping_range(phys_addr_t start, phys_addr_t end,
> +						  uintptr_t fixed_map_size)
>  {
>  	phys_addr_t pa;
>  	uintptr_t va, map_size;
> @@ -1435,7 +1429,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
>  	 * memory hotplug, we are not able to update all the page tables with
>  	 * the new PMDs.
>  	 */
> -	return vmemmap_populate_hugepages(start, end, node, NULL);
> +	return vmemmap_populate_hugepages(start, end, node, altmap);

I would have put this into a separate patch.

 

-- 
Oscar Salvador
SUSE Labs