*: 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/wfopen.c b/libbb/wfopen.c
index 9248874..ac365c2 100644
--- a/libbb/wfopen.c
+++ b/libbb/wfopen.c
@@ -9,7 +9,7 @@
#include "libbb.h"
-FILE *fopen_or_warn(const char *path, const char *mode)
+FILE* FAST_FUNC fopen_or_warn(const char *path, const char *mode)
{
FILE *fp = fopen(path, mode);
if (!fp) {