8 static int collect_syscall(struct task_struct *target, struct syscall_info *info)  in collect_syscall()  argument
13 	if (!try_get_task_stack(target)) {  in collect_syscall()
20 	regs = task_pt_regs(target);  in collect_syscall()
22 		put_task_stack(target);  in collect_syscall()
29 	info->data.nr = syscall_get_nr(target, regs);  in collect_syscall()
31 		syscall_get_arguments(target, regs, args);  in collect_syscall()
40 	put_task_stack(target);  in collect_syscall()
46  * @target:		thread to examine
53  * If @target is blocked in a system call, returns zero with @info.data.nr
57  * call is still in progress.  Note we may get this result if @target
61  * If @target is blocked in the kernel during a fault or exception,
63  * @info.data.args. If so, it's now safe to examine @target using
64  * &struct user_regset get() calls as long as we're sure @target won't return
67  * Returns -%EAGAIN if @target does not remain blocked.
69 int task_current_syscall(struct task_struct *target, struct syscall_info *info)  in task_current_syscall()  argument
74 	if (target == current)  in task_current_syscall()
75 		return collect_syscall(target, info);  in task_current_syscall()
77 	state = READ_ONCE(target->__state);  in task_current_syscall()
81 	ncsw = wait_task_inactive(target, state);  in task_current_syscall()
83 	    unlikely(collect_syscall(target, info)) ||  in task_current_syscall()
84 	    unlikely(wait_task_inactive(target, state) != ncsw))  in task_current_syscall()