From bce1a28686ed6527977a198f698278b67c6bf9ec Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 5 Apr 2006 09:45:45 +0100
Subject: [PATCH] [MIPS] R2: Instruction hazard barrier.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/kernel/entry.S | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 371571f4f280b..b1939a486d2c5 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -119,3 +119,18 @@ syscall_exit_work:
 	li	a1, 1
 	jal	do_syscall_trace
 	b	resume_userspace
+
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT)
+
+/*
+ * MIPS32R2 Instruction Hazard Barrier - must be called
+ *
+ * For C code use the inline version named instruction_hazard().
+ */
+LEAF(mips_ihb)
+	.set	mips32r2
+	jr.hb	ra
+	nop
+	END(mips_ihb)
+
+#endif /* CONFIG_CPU_MIPSR2 or CONFIG_MIPS_MT */
-- 
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