From 46ad8d2d22c17e2b577adec55ae87161666a3267 Mon Sep 17 00:00:00 2001
From: Vijay Kumar <vijay.ac.kumar@oracle.com>
Date: Wed, 11 Oct 2017 12:50:06 -0600
Subject: sparc64: Use sparc optimized fls and __fls for T4 and above

For T4 and above, patch fls and __fls functions
at the boot time to use lzcnt instruction.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/lib/NG4patch.S | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'arch/sparc/lib')

diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S
index 3cc0f8cc95df..da65a3ebb7cc 100644
--- a/arch/sparc/lib/NG4patch.S
+++ b/arch/sparc/lib/NG4patch.S
@@ -3,6 +3,8 @@
  * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
  */
 
+#include <linux/linkage.h>
+
 #define BRANCH_ALWAYS	0x10680000
 #define NOP		0x01000000
 #define NG_DO_PATCH(OLD, NEW)	\
@@ -52,3 +54,10 @@ niagara4_patch_pageops:
 	retl
 	 nop
 	.size	niagara4_patch_pageops,.-niagara4_patch_pageops
+
+ENTRY(niagara4_patch_fls)
+	NG_DO_PATCH(fls, NG4fls)
+	NG_DO_PATCH(__fls, __NG4fls)
+	retl
+	 nop
+ENDPROC(niagara4_patch_fls)
-- 
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