cregit-Linux how code gets into the kernel

Release 4.14 arch/ia64/include/asm/thread_info.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2002-2003 Hewlett-Packard Co
 *      David Mosberger-Tang <davidm@hpl.hp.com>
 */
#ifndef _ASM_IA64_THREAD_INFO_H

#define _ASM_IA64_THREAD_INFO_H

#ifndef ASM_OFFSETS_C
#include <asm/asm-offsets.h>
#endif
#include <asm/processor.h>
#include <asm/ptrace.h>

#ifndef __ASSEMBLY__

/*
 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
 * without having to do pointer masking.
 */

struct thread_info {
	
struct task_struct *task;	/* XXX not really needed, except for dup_task_struct() */
	
__u32 flags;			/* thread_info flags (see TIF_*) */
	
__u32 cpu;			/* current CPU */
	
__u32 last_cpu;			/* Last CPU thread ran on */
	
__u32 status;			/* Thread synchronous flags */
	
mm_segment_t addr_limit;	/* user-level address space limit */
	
int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
	
__u64 utime;
	
__u64 stime;
	
__u64 gtime;
	
__u64 hardirq_time;
	
__u64 softirq_time;
	
__u64 idle_time;
	
__u64 ac_stamp;
	
__u64 ac_leave;
	
__u64 ac_stime;
	
__u64 ac_utime;
#endif
};


#define THREAD_SIZE			KERNEL_STACK_SIZE


#define INIT_THREAD_INFO(tsk)			\
{                                               \
        .task           = &tsk,                 \
        .flags          = 0,                    \
        .cpu            = 0,                    \
        .addr_limit     = KERNEL_DS,            \
        .preempt_count  = INIT_PREEMPT_COUNT,   \
}

#ifndef ASM_OFFSETS_C
/* how to get the thread information struct from C */

#define current_thread_info()	((struct thread_info *) ((char *) current + IA64_TASK_SIZE))

#define alloc_thread_stack_node(tsk, node)	\
		((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE))

#define task_thread_info(tsk)	((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
#else

#define current_thread_info()	((struct thread_info *) 0)

#define alloc_thread_stack_node(tsk, node)	((unsigned long *) 0)

#define task_thread_info(tsk)	((struct thread_info *) 0)
#endif

#define free_thread_stack(tsk)	
/* nothing */

#define task_stack_page(tsk)	((void *)(tsk))


#define __HAVE_THREAD_FUNCTIONS
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE

#define setup_thread_stack(p, org)			\
	*task_thread_info(p) = *task_thread_info(org);  \
        task_thread_info(p)->ac_stime = 0;              \
        task_thread_info(p)->ac_utime = 0;              \
        task_thread_info(p)->task = (p);
#else

#define setup_thread_stack(p, org) \
	*task_thread_info(p) = *task_thread_info(org); \
        task_thread_info(p)->task = (p);
#endif

#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)


#define alloc_task_struct_node(node)						\
({                                                                              \
        struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP,     \
                                             KERNEL_STACK_SIZE_ORDER);          \
        struct task_struct *ret = page ? page_address(page) : NULL;             \
                                                                                \
        ret;                                                                    \
})

#define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)

#endif /* !__ASSEMBLY */

/*
 * thread information flags
 * - these are process state flags that various assembly files may need to access
 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
 *   in top 16 bits
 */

#define TIF_SIGPENDING		0	
/* signal pending */

#define TIF_NEED_RESCHED	1	
/* rescheduling necessary */

#define TIF_SYSCALL_TRACE	2	
/* syscall trace active */

#define TIF_SYSCALL_AUDIT	3	
/* syscall auditing active */

#define TIF_SINGLESTEP		4	
/* restore singlestep on return to user mode */

#define TIF_NOTIFY_RESUME	6	
/* resumption notification requested */

#define TIF_MEMDIE		17	
/* is terminating due to OOM killer */

#define TIF_MCA_INIT		18	
/* this task is processing MCA or INIT */

#define TIF_DB_DISABLED		19	
/* debug trap disabled for fsyscall */

#define TIF_RESTORE_RSE		21	
/* user RBS is newer than kernel RBS */

#define TIF_POLLING_NRFLAG	22	
/* idle is polling for TIF_NEED_RESCHED */


#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)

#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)

#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)

#define _TIF_SYSCALL_TRACEAUDIT	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)

#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)

#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)

#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)

#define _TIF_MCA_INIT		(1 << TIF_MCA_INIT)

#define _TIF_DB_DISABLED	(1 << TIF_DB_DISABLED)

#define _TIF_RESTORE_RSE	(1 << TIF_RESTORE_RSE)

#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)

/* "work to do on user-return" bits */

#define TIF_ALLWORK_MASK	(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
                                 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */

#define TIF_WORK_MASK		(TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))

#endif /* _ASM_IA64_THREAD_INFO_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
David Mosberger-Tang11232.84%412.12%
Al Viro4112.02%13.03%
Hidetoshi Seto329.38%13.03%
Tony Luck236.74%26.06%
Frédéric Weisbecker205.87%26.06%
Keith Owens185.28%26.06%
Petr Tesarik133.81%26.06%
Peter Martuccelli113.23%13.03%
Eric Dumazet102.93%26.06%
Peter Zijlstra92.64%13.03%
Jason Uhlenkott92.64%13.03%
Bibo Mao92.64%13.03%
Stéphane Eranian82.35%13.03%
Linus Torvalds51.47%13.03%
Andi Kleen41.17%13.03%
Brent Casavant41.17%13.03%
Andrea Arcangeli41.17%13.03%
Alexey Dobriyan20.59%13.03%
Greg Kroah-Hartman10.29%13.03%
Richard Weinberger10.29%13.03%
Andrew Lutomirski10.29%13.03%
Andreas Dilger10.29%13.03%
Andrew Morton10.29%13.03%
Sam Ravnborg10.29%13.03%
Jesper Juhl10.29%13.03%
Total341100.00%33100.00%
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