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mm: page_alloc: use div64_ul() instead of do_div()

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Fixes Coccinelle/coccicheck warning reported by do_div.cocci.

Compared to do_div(), div64_ul() does not implicitly cast the divisor and
does not unnecessarily calculate the remainder.

Link: https://lkml.kernel.org/r/20240228224911.1164-2-thorsten.blum@toblux.com
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thorsten Blum 2024-02-28 23:49:12 +01:00 • committed by Andrew Morton
parent f1cce6f7fa
commit 72741db683
1 changed files with 1 additions and 1 deletions
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2
mm/page_alloc.c
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@ -5848,7 +5848,7 @@ static void __setup_per_zone_wmarks(void)
spin_lock_irqsave(&zone->lock, flags);
tmp = (u64)pages_min * zone_managed_pages(zone);
do_div(tmp, lowmem_pages);
tmp = div64_ul(tmp, lowmem_pages);
if (is_highmem(zone) || zone_idx(zone) == ZONE_MOVABLE) {
/*
* __GFP_HIGH and PF_MEMALLOC allocations usually don't