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mm/page_alloc: remove VM_BUG_ON()s from pindex helpers

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Vlastimil pointed out that the VM_BUG_ON()s have fallen out of favour, so
remove them.

Link: https://lore.kernel.org/20260526-page_alloc-unmapped-prep-v2-1-412f4d486115@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Suggested-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Link: https://lore.kernel.org/all/4074a816-9e75-45a6-8141-25459bcc106b@kernel.org/
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Brendan Jackman 2026-05-26 11:28:36 +00:00 committed by Andrew Morton
parent 6cbdd9726f
commit 62f272d2fb
1 changed files with 1 additions and 8 deletions
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9
mm/page_alloc.c
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@ -653,13 +653,8 @@ static inline unsigned int order_to_pindex(int migratetype, int order)
if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
bool movable = migratetype == MIGRATE_MOVABLE;
if (order > PAGE_ALLOC_COSTLY_ORDER) {
VM_BUG_ON(!is_pmd_order(order));
if (order > PAGE_ALLOC_COSTLY_ORDER)
return NR_LOWORDER_PCP_LISTS + movable;
}
} else {
VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER);
}
return (MIGRATE_PCPTYPES * order) + migratetype;
@ -672,8 +667,6 @@ static inline int pindex_to_order(unsigned int pindex)
if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
if (pindex >= NR_LOWORDER_PCP_LISTS)
order = HPAGE_PMD_ORDER;
} else {
VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER);
}
return order;