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>
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_THREAD_INFO_H
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#define __UM_THREAD_INFO_H
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#ifndef __ASSEMBLY__
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#include <asm/types.h>
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#include <asm/page.h>
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#include <asm/uaccess.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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unsigned long flags; /* low level flags */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0 => preemptable,
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<0 => BUG */
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mm_segment_t addr_limit; /* thread address space:
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0-0xBFFFFFFF for user
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0-0xFFFFFFFF for kernel */
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struct restart_block restart_block;
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struct thread_info *real_thread; /* Points to non-IRQ stack */
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};
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = 1, \
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.addr_limit = KERNEL_DS, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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.real_thread = NULL, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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unsigned long mask = THREAD_SIZE - 1;
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ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
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return ti;
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}
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#ifdef CONFIG_DEBUG_STACK_USAGE
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#define alloc_thread_info(tsk) \
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((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \
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CONFIG_KERNEL_STACK_ORDER))
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#else
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/* thread information allocation */
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#define alloc_thread_info(tsk) \
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((struct thread_info *) __get_free_pages(GFP_KERNEL, \
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CONFIG_KERNEL_STACK_ORDER))
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#endif
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#define free_thread_info(ti) \
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free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)
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#endif
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#define PREEMPT_ACTIVE 0x10000000
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
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* TIF_NEED_RESCHED
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*/
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#define TIF_RESTART_BLOCK 4
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#define TIF_MEMDIE 5
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#define TIF_SYSCALL_AUDIT 6
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#define TIF_RESTORE_SIGMASK 7
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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#define _TIF_MEMDIE (1 << TIF_MEMDIE)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
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#endif
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