8 static int collect_syscall(struct task_struct *target, long *callno,  in collect_syscall()  argument
14 	if (!try_get_task_stack(target)) {  in collect_syscall()
21 	regs = task_pt_regs(target);  in collect_syscall()
23 		put_task_stack(target);  in collect_syscall()
30 	*callno = syscall_get_nr(target, regs);  in collect_syscall()
32 		syscall_get_arguments(target, regs, 0, maxargs, args);  in collect_syscall()
34 	put_task_stack(target);  in collect_syscall()
40  * @target:		thread to examine
47  * If @target is blocked in a system call, returns zero with *@callno
51  * call is still in progress.  Note we may get this result if @target
55  * If @target is blocked in the kernel during a fault or exception,
57  * If so, it's now safe to examine @target using &struct user_regset
58  * get() calls as long as we're sure @target won't return to user mode.
60  * Returns -%EAGAIN if @target does not remain blocked.
64 int task_current_syscall(struct task_struct *target, long *callno,  in task_current_syscall()  argument
74 	if (target == current)  in task_current_syscall()
75 		return collect_syscall(target, callno, args, maxargs, sp, pc);  in task_current_syscall()
77 	state = target->state;  in task_current_syscall()
81 	ncsw = wait_task_inactive(target, state);  in task_current_syscall()
83 	    unlikely(collect_syscall(target, callno, args, maxargs, sp, pc)) ||  in task_current_syscall()
84 	    unlikely(wait_task_inactive(target, state) != ncsw))  in task_current_syscall()