Commit 90e796e2 authored by Baoquan He's avatar Baoquan He Committed by Andrew Morton
Browse files

mm/mm_init.c: remove unneeded calc_memmap_size() 

Nobody calls calc_memmap_size() now.

Link: https://lkml.kernel.org/r/20240325145646.1044760-6-bhe@redhat.com


Signed-off-by: default avatarBaoquan He <bhe@redhat.com>
Reviewed-by: default avatarMike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 0ac5e785

mm/mm_init.c

+0 −20
Original line number Diff line number Diff line
@@ -1332,26 +1332,6 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat, 
	pr_debug("On node %d totalpages: %lu\n", pgdat->node_id, realtotalpages);

}



static unsigned long __init calc_memmap_size(unsigned long spanned_pages,

						unsigned long present_pages)

{

	unsigned long pages = spanned_pages;



	/*

	 * Provide a more accurate estimation if there are holes within

	 * the zone and SPARSEMEM is in use. If there are holes within the

	 * zone, each populated memory region may cost us one or two extra

	 * memmap pages due to alignment because memmap pages for each

	 * populated regions may not be naturally aligned on page boundary.

	 * So the (present_pages >> 4) heuristic is a tradeoff for that.

	 */

	if (spanned_pages > present_pages + (present_pages >> 4) &&

	    IS_ENABLED(CONFIG_SPARSEMEM))

		pages = present_pages;



	return PAGE_ALIGN(pages * sizeof(struct page)) >> PAGE_SHIFT;

}



#ifdef CONFIG_TRANSPARENT_HUGEPAGE

static void pgdat_init_split_queue(struct pglist_data *pgdat)

{