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mm/memory-failure: remove obsolete comment in unpoison_memory()

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Since commit 130d4df573 ("mm/sl[au]b: rearrange struct slab fields to
allow larger rcu_head"), folio->_mapcount is not overloaded with SLAB. 
Update corresponding comment.

Link: https://lkml.kernel.org/r/20240612071835.157004-10-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: kernel test robot <lkp@intel.com>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2024-06-12 15:18:31 +08:00 committed by Andrew Morton
parent 96e13a4ea2
commit 28eab7d4e7
1 changed files with 0 additions and 4 deletions
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4
mm/memory-failure.c
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@ -2584,10 +2584,6 @@ int unpoison_memory(unsigned long pfn)
folio_test_reserved(folio) || folio_test_offline(folio))
goto unlock_mutex;
/*
* Note that folio->_mapcount is overloaded in SLAB, so the simple test
* in folio_mapped() has to be done after folio_test_slab() is checked.
*/
if (folio_mapped(folio)) {
unpoison_pr_info("Unpoison: Someone maps the hwpoison page %#lx\n",
pfn, &unpoison_rs);