The patch titled
Subject: mm: move dummy_vm_ops out of a header
has been added to the -mm mm-unstable branch. Its filename is
mm-move-dummy_vm_ops-out-of-a-header.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-move-dummy_vm_ops-out-of-a-header.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: Mateusz Guzik <mjguzik@xxxxxxxxx>
Subject: mm: move dummy_vm_ops out of a header
Date: Mon, 7 Aug 2023 01:16:11 +0200
Otherwise the kernel ends up with multiple copies:
$ nm vmlinux | grep dummy_vm_ops
ffffffff81e4ea00 d dummy_vm_ops.2
ffffffff81e11760 d dummy_vm_ops.254
ffffffff81e406e0 d dummy_vm_ops.4
ffffffff81e3c780 d dummy_vm_ops.7
While here prefix it with vma_.
Link: https://lkml.kernel.org/r/20230806231611.1395735-1-mjguzik@xxxxxxxxx
Signed-off-by: Mateusz Guzik <mjguzik@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 6 +++---
mm/init-mm.c | 2 ++
2 files changed, 5 insertions(+), 3 deletions(-)
--- a/include/linux/mm.h~mm-move-dummy_vm_ops-out-of-a-header
+++ a/include/linux/mm.h
@@ -784,17 +784,17 @@ static inline struct vm_area_struct *loc
#endif /* CONFIG_PER_VMA_LOCK */
+extern const struct vm_operations_struct vma_dummy_vm_ops;
+
/*
* WARNING: vma_init does not initialize vma->vm_lock.
* Use vm_area_alloc()/vm_area_free() if vma needs locking.
*/
static inline void vma_init(struct vm_area_struct *vma, struct mm_struct *mm)
{
- static const struct vm_operations_struct dummy_vm_ops = {};
-
memset(vma, 0, sizeof(*vma));
vma->vm_mm = mm;
- vma->vm_ops = &dummy_vm_ops;
+ vma->vm_ops = &vma_dummy_vm_ops;
INIT_LIST_HEAD(&vma->anon_vma_chain);
vma_mark_detached(vma, false);
vma_numab_state_init(vma);
--- a/mm/init-mm.c~mm-move-dummy_vm_ops-out-of-a-header
+++ a/mm/init-mm.c
@@ -17,6 +17,8 @@
#define INIT_MM_CONTEXT(name)
#endif
+const struct vm_operations_struct vma_dummy_vm_ops;
+
/*
* For dynamically allocated mm_structs, there is a dynamically sized cpumask
* at the end of the structure, the size of which depends on the maximum CPU
_
Patches currently in -mm which might be from mjguzik@xxxxxxxxx are
mm-move-dummy_vm_ops-out-of-a-header.patch
