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mm/memory-failure: remove obsolete MF_MSG_DIFFERENT_COMPOUND

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The page cannot become compound pages again just after a folio is split as
an extra refcnt is held.  So the MF_MSG_DIFFERENT_COMPOUND case is
obsolete and can be removed to get rid of this false assumption and code
burden.  But add one WARN_ON() here to keep the situation clear.

Link: https://lkml.kernel.org/r/20240708030544.196919-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
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
2024-07-08 11:05:44 +08:00
committed by Andrew Morton
parent a5ea521250
commit 8a78882dac
2 changed files with 3 additions and 17 deletions
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1
include/ras/ras_event.h
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@@ -356,7 +356,6 @@ TRACE_EVENT(aer_event,
#define MF_PAGE_TYPE \
EM ( MF_MSG_KERNEL, "reserved kernel page" ) \
EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" ) \
EM ( MF_MSG_DIFFERENT_COMPOUND, "different compound page after locking" ) \
EM ( MF_MSG_HUGE, "huge page" ) \
EM ( MF_MSG_FREE_HUGE, "free huge page" ) \
EM ( MF_MSG_GET_HWPOISON, "get hwpoison page" ) \