scripts/kallsyms: replace prefix_underscores_count() with strspn()

You can do equivalent things with strspn(). I do not see noticeable
performance difference.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index baa2fa5..89cc7c0 100644 (file)
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -661,16 +661,6 @@ static int may_be_linker_script_provide_symbol(const struct sym_entry *se)
        return 0;
 }
 
-static int prefix_underscores_count(const char *str)
-{
-       const char *tail = str;
-
-       while (*tail == '_')
-               tail++;
-
-       return tail - str;
-}
-
 static int compare_symbols(const void *a, const void *b)
 {
        const struct sym_entry *sa;
@@ -699,8 +689,8 @@ static int compare_symbols(const void *a, const void *b)
                return wa - wb;
 
        /* sort by the number of prefix underscores */
-       wa = prefix_underscores_count(sym_name(sa));
-       wb = prefix_underscores_count(sym_name(sb));
+       wa = strspn(sym_name(sa), "_");
+       wb = strspn(sym_name(sb), "_");
        if (wa != wb)
                return wa - wb;