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    Subject[PATCH v4 01/48] mm: move some shrinker-related function declarations to mm/internal.h
    Date
    The following functions are only used inside the mm subsystem, so it's
    better to move their declarations to the mm/internal.h file.

    1. shrinker_debugfs_add()
    2. shrinker_debugfs_detach()
    3. shrinker_debugfs_remove()

    Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
    ---
    include/linux/shrinker.h | 19 -------------------
    mm/internal.h | 28 ++++++++++++++++++++++++++++
    2 files changed, 28 insertions(+), 19 deletions(-)

    diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
    index 224293b2dd06..8dc15aa37410 100644
    --- a/include/linux/shrinker.h
    +++ b/include/linux/shrinker.h
    @@ -106,28 +106,9 @@ extern void free_prealloced_shrinker(struct shrinker *shrinker);
    extern void synchronize_shrinkers(void);

    #ifdef CONFIG_SHRINKER_DEBUG
    -extern int shrinker_debugfs_add(struct shrinker *shrinker);
    -extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
    - int *debugfs_id);
    -extern void shrinker_debugfs_remove(struct dentry *debugfs_entry,
    - int debugfs_id);
    extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker,
    const char *fmt, ...);
    #else /* CONFIG_SHRINKER_DEBUG */
    -static inline int shrinker_debugfs_add(struct shrinker *shrinker)
    -{
    - return 0;
    -}
    -static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
    - int *debugfs_id)
    -{
    - *debugfs_id = -1;
    - return NULL;
    -}
    -static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry,
    - int debugfs_id)
    -{
    -}
    static inline __printf(2, 3)
    int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...)
    {
    diff --git a/mm/internal.h b/mm/internal.h
    index 154da4f0d557..6f21926393af 100644
    --- a/mm/internal.h
    +++ b/mm/internal.h
    @@ -1143,4 +1143,32 @@ struct vma_prepare {
    struct vm_area_struct *remove;
    struct vm_area_struct *remove2;
    };
    +
    +/*
    + * shrinker related functions
    + */
    +
    +#ifdef CONFIG_SHRINKER_DEBUG
    +extern int shrinker_debugfs_add(struct shrinker *shrinker);
    +extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
    + int *debugfs_id);
    +extern void shrinker_debugfs_remove(struct dentry *debugfs_entry,
    + int debugfs_id);
    +#else /* CONFIG_SHRINKER_DEBUG */
    +static inline int shrinker_debugfs_add(struct shrinker *shrinker)
    +{
    + return 0;
    +}
    +static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
    + int *debugfs_id)
    +{
    + *debugfs_id = -1;
    + return NULL;
    +}
    +static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry,
    + int debugfs_id)
    +{
    +}
    +#endif /* CONFIG_SHRINKER_DEBUG */
    +
    #endif /* __MM_INTERNAL_H */
    --
    2.30.2
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