Commit 41101809 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20120505150141.366461660@linutronix.de
parent 2889f608

kernel/fork.c

+17 −4
Original line number Diff line number Diff line
@@ -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)

{
@@ -131,6 +143,7 @@ static struct thread_info *alloc_thread_info_node(struct task_struct *tsk, 


static inline void free_thread_info(struct thread_info *ti)

{

	arch_release_thread_info(ti);

	free_pages((unsigned long)ti, THREAD_SIZE_ORDER);

}

#endif