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mm/rmap: make anon_vma functions internal

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The bulk of the anon_vma operations are only used by mm, so formalise this
by putting the function prototypes and inlines in mm/internal.h.  This
allows us to make changes without having to worry about the rest of the
kernel.

Link: https://lkml.kernel.org/r/79ec933c3a9c8bf1f64dab253bbfdae8a01cb921.1768746221.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Barry Song <v-songbaohua@oppo.com>
Cc: Chris Li <chriscli@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: Jann Horn <jannh@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Pedro Falcato <pfalcato@suse.de>
Cc: Rik van Riel <riel@surriel.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes 2026-01-18 14:50:42 +00:00 committed by Andrew Morton
parent 53eb797ffc
commit 7549e3d20f
2 changed files with 58 additions and 60 deletions
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60
include/linux/rmap.h
View File

@ -104,68 +104,8 @@ enum ttu_flags {
};
#ifdef CONFIG_MMU
static inline void get_anon_vma(struct anon_vma *anon_vma)
{
atomic_inc(&anon_vma->refcount);
}
void __put_anon_vma(struct anon_vma *anon_vma);
static inline void put_anon_vma(struct anon_vma *anon_vma)
{
if (atomic_dec_and_test(&anon_vma->refcount))
__put_anon_vma(anon_vma);
}
static inline void anon_vma_lock_write(struct anon_vma *anon_vma)
{
down_write(&anon_vma->root->rwsem);
}
static inline int anon_vma_trylock_write(struct anon_vma *anon_vma)
{
return down_write_trylock(&anon_vma->root->rwsem);
}
static inline void anon_vma_unlock_write(struct anon_vma *anon_vma)
{
up_write(&anon_vma->root->rwsem);
}
static inline void anon_vma_lock_read(struct anon_vma *anon_vma)
{
down_read(&anon_vma->root->rwsem);
}
static inline int anon_vma_trylock_read(struct anon_vma *anon_vma)
{
return down_read_trylock(&anon_vma->root->rwsem);
}
static inline void anon_vma_unlock_read(struct anon_vma *anon_vma)
{
up_read(&anon_vma->root->rwsem);
}
/*
* anon_vma helper functions.
*/
void anon_vma_init(void); /* create anon_vma_cachep */
int __anon_vma_prepare(struct vm_area_struct *);
void unlink_anon_vmas(struct vm_area_struct *);
int anon_vma_clone(struct vm_area_struct *, struct vm_area_struct *);
int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *);
static inline int anon_vma_prepare(struct vm_area_struct *vma)
{
if (likely(vma->anon_vma))
return 0;
return __anon_vma_prepare(vma);
}
struct anon_vma *folio_get_anon_vma(const struct folio *folio);
#ifdef CONFIG_MM_ID
static __always_inline void folio_lock_large_mapcount(struct folio *folio)

58
mm/internal.h
View File

@ -199,6 +199,64 @@ static inline void vma_close(struct vm_area_struct *vma)
#ifdef CONFIG_MMU
static inline void get_anon_vma(struct anon_vma *anon_vma)
{
atomic_inc(&anon_vma->refcount);
}
void __put_anon_vma(struct anon_vma *anon_vma);
static inline void put_anon_vma(struct anon_vma *anon_vma)
{
if (atomic_dec_and_test(&anon_vma->refcount))
__put_anon_vma(anon_vma);
}
static inline void anon_vma_lock_write(struct anon_vma *anon_vma)
{
down_write(&anon_vma->root->rwsem);
}
static inline int anon_vma_trylock_write(struct anon_vma *anon_vma)
{
return down_write_trylock(&anon_vma->root->rwsem);
}
static inline void anon_vma_unlock_write(struct anon_vma *anon_vma)
{
up_write(&anon_vma->root->rwsem);
}
static inline void anon_vma_lock_read(struct anon_vma *anon_vma)
{
down_read(&anon_vma->root->rwsem);
}
static inline int anon_vma_trylock_read(struct anon_vma *anon_vma)
{
return down_read_trylock(&anon_vma->root->rwsem);
}
static inline void anon_vma_unlock_read(struct anon_vma *anon_vma)
{
up_read(&anon_vma->root->rwsem);
}
struct anon_vma *folio_get_anon_vma(const struct folio *folio);
int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src);
int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma);
int __anon_vma_prepare(struct vm_area_struct *vma);
void unlink_anon_vmas(struct vm_area_struct *vma);
static inline int anon_vma_prepare(struct vm_area_struct *vma)
{
if (likely(vma->anon_vma))
return 0;
return __anon_vma_prepare(vma);
}
/* Flags for folio_pte_batch(). */
typedef int __bitwise fpb_t;