Re: [PATCH] mm/sparse: correct init section annotations

[Andrew Morton <akpm@linux-foundation.org>]

On Sat,  1 Aug 2026 01:47:55 +0900 Sang-Heon Jeon <ekffu200098@gmail.com> wrote:

> The !SPARSEMEM_EXTREME stub of sparse_index_init() has no annotation
> but the SPARSEMEM_EXTREME variant is __meminit. So mark the stub
> __meminit too.
> 
> mminit_validate_memmodel_limits() is only called by memory_present(),
> which is __init. So mark it __init.
> 
> sparse_usagebuf and sparse_usagebuf_end are only used by
> sparse_init_early_section(), sparse_usage_init() and sparse_usage_fini(),
> which are all __init. So mark them __initdata.
> 

lgtm, thanks.

> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -104,7 +104,7 @@ int __meminit sparse_index_init(unsigned long section_nr, int nid)
>  	return 0;
>  }
>  #else /* !SPARSEMEM_EXTREME */
> -int sparse_index_init(unsigned long section_nr, int nid)
> +int __meminit sparse_index_init(unsigned long section_nr, int nid)
>  {
>  	return 0;
>  }

We could make this

#ifndef CONFIG_SPARSEMEM_EXTREME
static inline int __meminit sparse_index_init(unsigned long section_nr, int nid)
{
	return 0;
}
#endif

in a header and make it go away altogether.