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    Subject[patch 02/18] fork: Provide weak arch_release_[task_struct|thread_info] functions
    These functions allow us to move most of the duplicated thread_info
    allocators to the core code.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    kernel/fork.c | 21 +++++++++++++++++----
    1 file changed, 17 insertions(+), 4 deletions(-)

    Index: tip/kernel/fork.c
    ===================================================================
    --- tip.orig/kernel/fork.c
    +++ tip/kernel/fork.c
    @@ -112,14 +112,26 @@ int nr_processes(void)
    }

    #ifndef __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
    -# define alloc_task_struct_node(node) \
    - kmem_cache_alloc_node(task_struct_cachep, GFP_KERNEL, node)
    -# define free_task_struct(tsk) \
    - kmem_cache_free(task_struct_cachep, (tsk))
    static struct kmem_cache *task_struct_cachep;
    +
    +static inline struct task_struct *alloc_task_struct_node(int node)
    +{
    + return kmem_cache_alloc_node(task_struct_cachep, GFP_KERNEL, node);
    +}
    +
    +void __weak arch_release_task_struct(struct task_struct *tsk) { }
    +
    +static inline void free_task_struct(struct task_struct *tsk)
    +{
    + arch_release_task_struct(tsk);
    + kmem_cache_free(task_struct_cachep, tsk);
    +}
    #endif

    #ifndef __HAVE_ARCH_THREAD_INFO_ALLOCATOR
    +
    +void __weak arch_release_thread_info(struct thread_info *ti) { }
    +
    static struct thread_info *alloc_thread_info_node(struct task_struct *tsk,
    int node)
    {
    @@ -135,6 +147,7 @@ static struct thread_info *alloc_thread_

    static inline void free_thread_info(struct thread_info *ti)
    {
    + arch_release_thread_info(ti);
    free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
    }
    #endif



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