mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
a5a678c80b
Tidy current-related stuff. There was a comment in current.h saying that current_thread was obsolete, so this patch turns all instances of current_thread into current_thread_info(). There's some simplifying of the result in arch/um/sys-i386/signal.c. current.h and thread_info also get style cleanups. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __UM_THREAD_INFO_H
|
|
#define __UM_THREAD_INFO_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/page.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
__u32 cpu; /* current CPU */
|
|
int preempt_count; /* 0 => preemptable,
|
|
<0 => BUG */
|
|
mm_segment_t addr_limit; /* thread address space:
|
|
0-0xBFFFFFFF for user
|
|
0-0xFFFFFFFF for kernel */
|
|
struct restart_block restart_block;
|
|
struct thread_info *real_thread; /* Points to non-IRQ stack */
|
|
};
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = 1, \
|
|
.addr_limit = KERNEL_DS, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
.real_thread = NULL, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
struct thread_info *ti;
|
|
unsigned long mask = THREAD_SIZE - 1;
|
|
ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
|
|
return ti;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
#define alloc_thread_info(tsk) \
|
|
((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \
|
|
CONFIG_KERNEL_STACK_ORDER))
|
|
#else
|
|
|
|
/* thread information allocation */
|
|
#define alloc_thread_info(tsk) \
|
|
((struct thread_info *) __get_free_pages(GFP_KERNEL, \
|
|
CONFIG_KERNEL_STACK_ORDER))
|
|
#endif
|
|
|
|
#define free_thread_info(ti) \
|
|
free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)
|
|
|
|
#endif
|
|
|
|
#define PREEMPT_ACTIVE 0x10000000
|
|
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
|
|
* TIF_NEED_RESCHED
|
|
*/
|
|
#define TIF_RESTART_BLOCK 4
|
|
#define TIF_MEMDIE 5
|
|
#define TIF_SYSCALL_AUDIT 6
|
|
#define TIF_RESTORE_SIGMASK 7
|
|
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
|
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
|
|
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
|
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
|
|
|
|
#endif
|