*: introduce and use FAST_FUNC: regparm on i386, otherwise no-on
text data bss dec hex filename
808035 611 6868 815514 c719a busybox_old
804472 611 6868 811951 c63af busybox_unstripped
diff --git a/libbb/setup_environment.c b/libbb/setup_environment.c
index 6e3575c..04e333f 100644
--- a/libbb/setup_environment.c
+++ b/libbb/setup_environment.c
@@ -30,7 +30,7 @@
#include "libbb.h"
-void setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw)
+void FAST_FUNC setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw)
{
if (clear_env) {
const char *term;