From: Sami Kerola <kerolasa@iki.fi>
Date: Sun, 4 Sep 2016 20:04:02 +0000 (+0100)
Subject: performance: set few variables read-only
X-Git-Tag: v0.88~26^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=68159b381136d0c03b995eb8975c164448118957;p=thirdparty%2Fmtr.git

performance: set few variables read-only
---

diff --git a/mtr.c b/mtr.c
index 534e8ac..250c9fa 100644
--- a/mtr.c
+++ b/mtr.c
@@ -66,7 +66,7 @@
 #endif
 
 
-struct fields data_fields[MAXFLD] = {
+const struct fields data_fields[MAXFLD] = {
   /* key, Remark, Header, Format, Width, CallBackFunc */
   {' ', "<sp>: Space between fields", " ",  " ",        1, &net_drop  },
   {'L', "L: Loss Ratio",          "Loss%",  " %4.1f%%", 6, &net_loss  },
@@ -271,7 +271,7 @@ static void parse_arg (struct mtr_ctl *ctl, int argc, char **argv)
   enum {
     OPT_DISPLAYMODE = CHAR_MAX + 1
   };
-  static struct option long_options[] = {
+  static const struct option long_options[] = {
     /* option name, has argument, NULL, short name */
     { "help",           0, NULL, 'h' },
     { "version",        0, NULL, 'v' },
diff --git a/net.h b/net.h
index 44814fe..587bd68 100644
--- a/net.h
+++ b/net.h
@@ -113,7 +113,7 @@ struct fields {
   int (*net_xxx)(int);
 };
 
-extern struct fields data_fields[MAXFLD];
+extern const struct fields data_fields[MAXFLD];
 
 /* MPLS label object */
 struct mplslen {