--- zzzz-none-000/linux-4.1.38/arch/arm/mm/proc-macros.S	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/arch/arm/mm/proc-macros.S	2020-11-25 10:06:48.000000000 +0000
@@ -359,3 +359,11 @@
 	orr	\dest, \addr, \dest, lsl #1	@ mask in the region size
 	orr	\dest, \dest, \enable
 .endm
+
+#if defined(CONFIG_BCM_KF_ARM_BCM963XX) && defined(CONFIG_BCM_B15_MEGA_BARRIER)
+.macro issue_mega_barrier
+	stmfd	sp!,{r3,lr}
+	blx	BcmMegaBarrier
+	ldmfd	sp!,{r3,lr}
+.endm
+#endif