+ mm-vma-expand-mmap_region-munmap-call-fix.patch added to mm-unstable branch

+ mm-vma-expand-mmap_region-munmap-call-fix.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: fixup vma.h for nommu
has been added to the -mm mm-unstable branch.  Its filename is
     mm-vma-expand-mmap_region-munmap-call-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vma-expand-mmap_region-munmap-call-fix.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: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: mm: fixup vma.h for nommu
Date: Sun, 25 Aug 2024 12:29:47 +0100

Some series of includes result in vma.h being imported by nommu under
certain circumstances, which references FIRST_USER_ADDRESS and
USER_PGTABLES_CEILING, neither of which are necessarily defined in a nommu
scenario.

Work around this by wrapping the inline function which references these
(init_vma_munmap()) in an #ifdef CONFIG_MMU.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Bert Karwatzki <spasswolf@web.de>
Cc: Jiri Olsa <olsajiri@gmail.com>
Cc: Kees Cook <kees@kernel.org>
Cc: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vma.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/mm/vma.h~mm-vma-expand-mmap_region-munmap-call-fix
+++ a/mm/vma.h
@@ -78,6 +78,7 @@ int vma_expand(struct vma_iterator *vmi,
 int vma_shrink(struct vma_iterator *vmi, struct vm_area_struct *vma,
 	       unsigned long start, unsigned long end, pgoff_t pgoff);
 
+#ifdef CONFIG_MMU
 /*
  * init_vma_munmap() - Initializer wrapper for vma_munmap_struct
  * @vms: The vma munmap struct
@@ -104,6 +105,7 @@ static inline void init_vma_munmap(struc
 	vms->nr_pages = vms->locked_vm = vms->nr_accounted = 0;
 	vms->exec_vm = vms->stack_vm = vms->data_vm = 0;
 }
+#endif
 
 int vms_gather_munmap_vmas(struct vma_munmap_struct *vms,
 		struct ma_state *mas_detach);
_

Patches currently in -mm which might be from lorenzo.stoakes@oracle.com are

userfaultfd-move-core-vma-manipulation-logic-to-mm-userfaultfdc.patch
userfaultfd-move-core-vma-manipulation-logic-to-mm-userfaultfdc-fix.patch
mm-move-vma_modify-and-helpers-to-internal-header.patch
mm-move-vma_shrink-vma_expand-to-internal-header.patch
mm-move-internal-core-vma-manipulation-functions-to-own-file.patch
maintainers-add-entry-for-new-vma-files.patch
tools-separate-out-shared-radix-tree-components.patch
tools-add-skeleton-code-for-userland-testing-of-vma-logic.patch
mm-vma-expand-mmap_region-munmap-call-fix.patch
mm-vma-track-start-and-end-for-munmap-in-vma_munmap_struct-fix.patch
tools-improve-vma-test-makefile.patch
tools-add-vma-merge-tests.patch
mm-introduce-vma_merge_struct-and-abstract-vma_mergevma_modify.patch
mm-remove-duplicated-open-coded-vma-policy-check.patch
mm-abstract-vma_expand-to-use-vma_merge_struct.patch
mm-avoid-using-vma_merge-for-new-vmas.patch
mm-avoid-using-vma_merge-for-new-vmas-fix.patch
mm-make-vma_prepare-and-friends-static-and-internal-to-vmac.patch
mm-introduce-commit_merge-abstracting-final-commit-of-merge.patch
mm-refactor-vma_merge-into-modify-only-vma_merge_existing_range.patch
mm-rework-vm_ops-close-handling-on-vma-merge.patch