[PATCH v3 4/4] mm/page_alloc: remove a couple of VM_BUG_ON()st

From: Brendan Jackman

Date: Wed Jul 15 2026 - 07:05:51 EST


VM_BUG_ON() is out of favour and on the way to removal, since I recently
touched alloc_pages_node_noprof() I am removing that invocation, and
also removing the __folio_alloc_node_noprof() one for consistency. If
this precondition is violated, the system will soon crash anyway.

Suggested-by: Zi Yan <ziy@xxxxxxxxxx>
Link: https://lore.kernel.org/all/7F866265-3F2E-4765-B9D4-9AB898A9C4AC@xxxxxxxxxx/
Acked-by: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Brendan Jackman <jackmanb@xxxxxxxxxx>
---
include/linux/gfp.h | 1 -
mm/page_alloc.c | 1 -
2 files changed, 2 deletions(-)

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 4d57e9c0bf204..872bc53f32ec8 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -255,7 +255,6 @@ static inline void warn_if_node_offline(int this_node, gfp_t gfp_mask)
static inline
struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid)
{
- VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
warn_if_node_offline(nid, gfp);

return __folio_alloc_noprof(gfp, order, nid, NULL);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 25a83a57aab66..4c6815f84adc6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5427,7 +5427,6 @@ struct page *alloc_pages_node_noprof(int nid, gfp_t gfp_mask, unsigned int order
if (nid == NUMA_NO_NODE)
nid = numa_mem_id();

- VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
warn_if_node_offline(nid, gfp_mask);

return __alloc_pages_noprof(gfp_mask, order, nid, NULL, ALLOC_DEFAULT);

--
2.54.0