/* thread_info.h: PPC low-level thread information * adapted from the i386 version by Paul Mackerras * * Copyright (C) 2002  David Howells (dhowells@redhat.com) * - Incorporating suggestions made by Linus Torvalds and Dave Miller */ #ifndef _ASM_THREAD_INFO_H#define _ASM_THREAD_INFO_H #ifdef __KERNEL__#ifndef __ASSEMBLY__/* * low level task data. * If you change this, change the TI_* offsets below to match. */struct thread_info {	struct task_struct	*task;		/* main task structure */	struct exec_domain	*exec_domain;	/* execution domain */	unsigned long		flags;		/* low level flags */	unsigned long		local_flags;	/* non-racy flags */	int			cpu;		/* cpu we're on */	int			preempt_count;	/* 0 => preemptable,						   <0 => BUG */	struct restart_block	restart_block;}; #define INIT_THREAD_INFO(tsk)			\{						\	.task =		&tsk,			\	.exec_domain =	&default_exec_domain,	\	.flags =	0,			\	.local_flags =  0,			\	.cpu =		0,			\	.preempt_count = 1,			\	.restart_block = {			\		.fn = do_no_restart_syscall,	\	},					\} #define init_thread_info	(init_thread_union.thread_info)#define init_stack		(init_thread_union.stack) /* * macros/functions for gaining access to the thread information structure */ /* how to get the thread information struct from C */static inline struct thread_info *current_thread_info(void){	struct thread_info *ti;	__asm__("rlwinm %0,1,0,0,18" : "=r"(ti));	return ti;} /* thread information allocation */#define alloc_thread_info(tsk) ((struct thread_info *) \				__get_free_pages(GFP_KERNEL, 1))#define free_thread_info(ti)	free_pages((unsigned long) (ti), 1)#define get_thread_info(ti)	get_task_struct((ti)->task)#define put_thread_info(ti)	put_task_struct((ti)->task)#endif /* __ASSEMBLY__ */ /* * Size of kernel stack for each process. */#define THREAD_SIZE		8192	/* 2 pages */ #define PREEMPT_ACTIVE		0x10000000 /* * thread information flag bit numbers */#define TIF_SYSCALL_TRACE	0	/* syscall trace active */#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */#define TIF_SIGPENDING		2	/* signal pending */#define TIF_NEED_RESCHED	3	/* rescheduling necessary */#define TIF_POLLING_NRFLAG	4	/* true if poll_idle() is polling					   TIF_NEED_RESCHED */#define TIF_MEMDIE		5#define TIF_SYSCALL_AUDIT       6       /* syscall auditing active */#define TIF_SECCOMP             7      /* secure computing */ /* as above, but as bit values */#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)#define _TIF_SYSCALL_AUDIT      (1<<TIF_SYSCALL_AUDIT)#define _TIF_SECCOMP            (1<<TIF_SECCOMP) #define _TIF_SYSCALL_T_OR_A     (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP) /* * Non racy (local) flags bit numbers */#define TIFL_FORCE_NOERROR	0	/* don't return error from current					   syscall even if result < 0 */ /* as above, but as bit values */#define _TIFL_FORCE_NOERROR	(1<<TIFL_FORCE_NOERROR)  #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */