From: David S. Miller <davem@davemloft.net>
Date: Tue, 19 Feb 2008 00:50:22 +0000 (-0800)
Subject: [NET]: Elminate spurious print_mac() calls.
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8f789c48448aed74fe1c07af76de8f04adacec7d;p=openwrt%2Fstaging%2Fblogic.git

[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>
---

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