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
diff --git a/kernel/fork.c b/kernel/fork.c
index 5d22b9b..2dfad02 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -112,14 +112,26 @@
}
#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 inline void free_thread_info(struct thread_info *ti)
{
+ arch_release_thread_info(ti);
free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
}
#endif