+ mm-include-swaph-in-swapopsh.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: include swap.h in swapops.h
has been added to the -mm mm-unstable branch.  Its filename is
     mm-include-swaph-in-swapopsh.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-include-swaph-in-swapopsh.patch

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

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------------------------------------------------------
From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Subject: mm: include swap.h in swapops.h
Date: Tue, 18 Aug 2026 12:50:26 +0100

swapops.h uses MAX_SWAPFILES_SHIFT, SWP_MIGRATION_READ and SWP_PTE_MARKER,
all of which swap.h defines, but does not include swap.h.  It compiles only
where the translation unit pulled swap.h in first.  leafops.h includes
swapops.h on the line above swap.h, so a file whose include list reaches
leafops.h before swap.h gets:

    In file included from include/linux/leafops.h:11:
    include/linux/swapops.h:88:21: error: use of undeclared
    identifier 'MAX_SWAPFILES_SHIFT'

A header that uses a definition has to include the header that provides it.

Link: https://lore.kernel.org/20260818115026.656406-1-kirill@shutemov.name
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202608181757.mza9RRj7-lkp@intel.com/
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/swapops.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/linux/swapops.h~mm-include-swaph-in-swapopsh
+++ a/include/linux/swapops.h
@@ -5,6 +5,7 @@
 #include <linux/radix-tree.h>
 #include <linux/bug.h>
 #include <linux/mm_types.h>
+#include <linux/swap.h>
 
 #ifdef CONFIG_MMU
 
_

Patches currently in -mm which might be from kas@kernel.org are

mm-include-swaph-in-swapopsh.patch