From 8f789c48448aed74fe1c07af76de8f04adacec7d Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 18 Feb 2008 16:50:22 -0800
Subject: [PATCH] [NET]: Elminate spurious print_mac() calls.

Patrick McHardy notes that print_mac() can get invoked
even if the result it unused (f.e. as an argument to
pr_debug() when DEBUG is not defined).

Mark this function as "__pure" to eliminate this problem.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/if_ether.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index 7a1e011b8a2c..42dc6a3571ec 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -129,7 +129,7 @@ extern ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len);
 /*
  *	Display a 6 byte device address (MAC) in a readable format.
  */
-extern char *print_mac(char *buf, const unsigned char *addr);
+extern __pure char *print_mac(char *buf, const unsigned char *addr);
 #define MAC_BUF_SIZE	18
 #define DECLARE_MAC_BUF(var) char var[MAC_BUF_SIZE] __maybe_unused
 
-- 
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