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b69c49b784
We duplicate alloc/free_thread_info defines on many platforms (the majority uses __get_free_pages/free_pages). This patch defines common defines and removes these duplicated defines. __HAVE_ARCH_THREAD_INFO_ALLOCATOR is introduced for platforms that do something different. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
#ifndef _ASM_PARISC_THREAD_INFO_H
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#define _ASM_PARISC_THREAD_INFO_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#include <asm/processor.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; /* thread_info flags (see TIF_*) */
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mm_segment_t addr_limit; /* user-level address space limit */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
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struct restart_block restart_block;
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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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.addr_limit = KERNEL_DS, \
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.preempt_count = 1, \
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.restart_block = { \
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.fn = do_no_restart_syscall \
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} \
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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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/* thread information allocation */
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#define THREAD_SIZE_ORDER 2
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/* Be sure to hunt all references to this down when you change the size of
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* the kernel stack */
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#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
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#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER)
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/* how to get the thread information struct from C */
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#define current_thread_info() ((struct thread_info *)mfctl(30))
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#endif /* !__ASSEMBLY */
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#define PREEMPT_ACTIVE_BIT 28
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#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
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/*
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* thread information flags
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*/
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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 TIF_NEED_RESCHED */
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#define TIF_32BIT 4 /* 32 bit binary */
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#define TIF_MEMDIE 5
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#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
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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_32BIT (1 << TIF_32BIT)
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#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
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#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | \
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_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
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#endif /* __KERNEL__ */
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#endif /* _ASM_PARISC_THREAD_INFO_H */
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