diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index bf35c178a877..a9e8f7e55fd6 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -280,67 +280,6 @@ void show_fpregs(struct user_fp *regs) (unsigned long)regs->fpcr); } -/* - * Task structure and kernel stack allocation. - */ -struct thread_info_list { - unsigned long *head; - unsigned int nr; -}; - -static DEFINE_PER_CPU(struct thread_info_list, thread_info_list) = { NULL, 0 }; - -#define EXTRA_TASK_STRUCT 4 - -struct thread_info *alloc_thread_info(struct task_struct *task) -{ - struct thread_info *thread = NULL; - - if (EXTRA_TASK_STRUCT) { - struct thread_info_list *th = &get_cpu_var(thread_info_list); - unsigned long *p = th->head; - - if (p) { - th->head = (unsigned long *)p[0]; - th->nr -= 1; - } - put_cpu_var(thread_info_list); - - thread = (struct thread_info *)p; - } - - if (!thread) - thread = (struct thread_info *) - __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER); - -#ifdef CONFIG_DEBUG_STACK_USAGE - /* - * The stack must be cleared if you want SYSRQ-T to - * give sensible stack usage information - */ - if (thread) - memzero(thread, THREAD_SIZE); -#endif - return thread; -} - -void free_thread_info(struct thread_info *thread) -{ - if (EXTRA_TASK_STRUCT) { - struct thread_info_list *th = &get_cpu_var(thread_info_list); - if (th->nr < EXTRA_TASK_STRUCT) { - unsigned long *p = (unsigned long *)thread; - p[0] = (unsigned long)th->head; - th->head = p; - th->nr += 1; - put_cpu_var(thread_info_list); - return; - } - put_cpu_var(thread_info_list); - } - free_pages((unsigned long)thread, THREAD_SIZE_ORDER); -} - /* * Free current thread data structures etc.. */ diff --git a/include/asm-arm/thread_info.h b/include/asm-arm/thread_info.h index f28b236139ed..d9b8bddc8732 100644 --- a/include/asm-arm/thread_info.h +++ b/include/asm-arm/thread_info.h @@ -94,8 +94,18 @@ static inline struct thread_info *current_thread_info(void) return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); } -extern struct thread_info *alloc_thread_info(struct task_struct *task); -extern void free_thread_info(struct thread_info *); +/* thread information allocation */ +#ifdef CONFIG_DEBUG_STACK_USAGE +#define alloc_thread_info(tsk) \ + ((struct thread_info *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, \ + THREAD_SIZE_ORDER)) +#else +#define alloc_thread_info(tsk) \ + ((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER)) +#endif + +#define free_thread_info(info) \ + free_pages((unsigned long)info, THREAD_SIZE_ORDER); #define thread_saved_pc(tsk) \ ((unsigned long)(pc_pointer(task_thread_info(tsk)->cpu_context.pc)))