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mm: move dummy_vm_ops out of a header 

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@gmail.com
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mateusz Guzik 2023-08-07 01:16:11 +02:00 committed by Andrew Morton
parent c9d6e982c3
commit 9a9d0b8299
2 changed files with 5 additions and 3 deletions
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6
include/linux/mm.h
View File

@ -751,17 +751,17 @@ static inline struct vm_area_struct *lock_vma_under_rcu(struct mm_struct *mm,
#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);

2
mm/init-mm.c
View File

@ -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