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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>
Link: http://lkml.kernel.org/r/20120505150141.366461660@linutronix.de
This commit is contained in:
Thomas Gleixner 2012-05-05 15:05:41 +00:00
parent 2889f60814
commit 41101809a8
1 changed files with 17 additions and 4 deletions
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21
kernel/fork.c
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@ -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