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mm/huge_memory: remove unnecessary sanity checks

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These checks have been in place since 2014, I think we can safely assume
that we are in a place where we don't need these as runtime checks.

In addition there are 4 other invocations of folio_remove_rmap_pmd(), none
of which make this assertion.

If we need to add this assertion, it should be in folio_remove_rmap_pmd(),
and as a VM_WARN_ON_ONCE(), however these seem superfluous so just remove
them.

Link: https://lkml.kernel.org/r/0c4c5ab247c90f80cf44718e8124b217d6a22544.1774029655.git.ljs@kernel.org
Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nico Pache <npache@redhat.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes (Oracle) 2026-03-20 18:07:25 +00:00 committed by Andrew Morton
parent d490940f3a
commit 1fc034c1c9
1 changed files with 0 additions and 2 deletions
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2
mm/huge_memory.c
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@ -2448,7 +2448,6 @@ bool zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
flush_needed = true;
folio_remove_rmap_pmd(folio, &folio->page, vma);
WARN_ON_ONCE(folio_mapcount(folio) < 0);
} else if (pmd_is_valid_softleaf(orig_pmd)) {
const softleaf_t entry = softleaf_from_pmd(orig_pmd);
@ -2479,7 +2478,6 @@ bool zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
if (folio_is_device_private(folio)) {
folio_remove_rmap_pmd(folio, &folio->page, vma);
WARN_ON_ONCE(folio_mapcount(folio) < 0);
folio_put(folio);
}