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mm/mm_init.c: remove unneeded calc_memmap_size()

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Nobody calls calc_memmap_size() now.

Link: https://lkml.kernel.org/r/20240325145646.1044760-6-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baoquan He 2024-03-25 22:56:45 +08:00 committed by Andrew Morton
parent 0ac5e785dc
commit 90e796e22e
1 changed files with 0 additions and 20 deletions
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20
mm/mm_init.c
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@ -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); 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 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
static void pgdat_init_split_queue(struct pglist_data *pgdat) static void pgdat_init_split_queue(struct pglist_data *pgdat)
{ {