+ mm-memoryc-zap_pte_range-print-bad-swap-entry.patch added to mm-hotfixes-unstable branch

+ mm-memoryc-zap_pte_range-print-bad-swap-entry.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/memory.c:zap_pte_range() print bad swap entry
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-memoryc-zap_pte_range-print-bad-swap-entry.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memoryc-zap_pte_range-print-bad-swap-entry.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: mm/memory.c:zap_pte_range() print bad swap entry
Date: Wed Nov 15 01:54:18 PM PST 2023

We have a report of this WARN() triggering.  Let's print the offending
swp_entry_t to help diagnosis.

Link: https://lkml.kernel.org/r/000000000000b0e576060a30ee3b@google.com
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/memory.c~mm-memoryc-zap_pte_range-print-bad-swap-entry
+++ a/mm/memory.c
@@ -1517,6 +1517,7 @@ static unsigned long zap_pte_range(struc
 				continue;
 		} else {
 			/* We should have covered all the swap entry types */
+			pr_alert("unrecognized swap entry 0x%lx\n", entry.val);
 			WARN_ON_ONCE(1);
 		}
 		pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

mm-fix-for-negative-counter-nr_file_hugepages-fix.patch
maintainers-add-andrew-morton-for-lib.patch
mm-memoryc-zap_pte_range-print-bad-swap-entry.patch
mm-shmem-fix-race-in-shmem_undo_range-w-thp-fix.patch
mm-add-folio_zero_tail-and-use-it-in-ext4-fix.patch
mm-add-folio_fill_tail-and-use-it-in-iomap-fix.patch
kernel-reboot-explicitly-notify-if-halt-occurred-instead-of-power-off-fix.patch