33 user_backtrace(struct frame_tail __user *tail,  in user_backtrace()  argument
40 	if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))  in user_backtrace()
44 	err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));  in user_backtrace()
56 	if (tail >= buftail.fp)  in user_backtrace()
78 compat_user_backtrace(struct compat_frame_tail __user *tail,  in compat_user_backtrace()  argument
85 	if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))  in compat_user_backtrace()
89 	err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));  in compat_user_backtrace()
101 	if (tail + 1 >= (struct compat_frame_tail __user *)  in compat_user_backtrace()
121 		struct frame_tail __user *tail;  in perf_callchain_user()  local
123 		tail = (struct frame_tail __user *)regs->regs[29];  in perf_callchain_user()
126 		       tail && !((unsigned long)tail & 0xf))  in perf_callchain_user()
127 			tail = user_backtrace(tail, entry);  in perf_callchain_user()
131 		struct compat_frame_tail __user *tail;  in perf_callchain_user()  local
133 		tail = (struct compat_frame_tail __user *)regs->compat_fp - 1;  in perf_callchain_user()
136 			tail && !((unsigned long)tail & 0x3))  in perf_callchain_user()
137 			tail = compat_user_backtrace(tail, entry);  in perf_callchain_user()