1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2013 Seiji Aguchi <seiji.aguchi@hds.com> 4 */ 5 #include <linux/jump_label.h> 6 #include <linux/atomic.h> 7 8 #include <asm/trace/exceptions.h> 9 10 DEFINE_STATIC_KEY_FALSE(trace_pagefault_key); 11 trace_pagefault_reg(void)12 int trace_pagefault_reg(void) 13 { 14 static_branch_inc(&trace_pagefault_key); 15 return 0; 16 } 17 trace_pagefault_unreg(void)18 void trace_pagefault_unreg(void) 19 { 20 static_branch_dec(&trace_pagefault_key); 21 } 22