modinfo: trivial optimizations

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/modutils/modinfo.c b/modutils/modinfo.c
index cc50182..db134bd 100644 (file)
--- a/modutils/modinfo.c
+++ b/modutils/modinfo.c
@@ -44,7 +44,7 @@ static int display(const char *data, const char *pattern, int flag)
 }
 
 static void modinfo(const char *path, const char *version,
-                       struct modinfo_env *env)
+                       const struct modinfo_env *env)
 {
        static const char *const shortcuts[] = {
                "filename",
@@ -82,11 +82,13 @@ static void modinfo(const char *path, const char *version,
        if (field)
                tags |= OPT_F;
        for (j = 1; (1<<j) & (OPT_TAGS + OPT_F); j++) {
-               const char *pattern = field;
-               if ((1<<j) & OPT_TAGS)
-                       pattern = shortcuts[j];
+               const char *pattern;
+
                if (!((1<<j) & tags))
                        continue;
+               pattern = field;
+               if ((1<<j) & OPT_TAGS)
+                       pattern = shortcuts[j];
                length = strlen(pattern);
                ptr = the_module;
                while (1) {