bcachefs: fix for building in userspace

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/super.c

@@ -87,20 +87,27 @@ const char * const bch2_fs_flag_strs[] = {
 	NULL
 };
 
-void bch2_print_opts(struct bch_opts *opts, const char *fmt, ...)
+static void bch2_print_maybe_redirect(struct stdio_redirect *stdio, const char *fmt, va_list args)
 {
-	struct stdio_redirect *stdio = (void *)(unsigned long)opts->stdio;
-
-	va_list args;
-	va_start(args, fmt);
-	if (likely(!stdio)) {
-		vprintk(fmt, args);
-	} else {
+#ifdef __KERNEL__
+	if (unlikely(stdio)) {
 		if (fmt[0] == KERN_SOH[0])
 			fmt += 2;
 
 		bch2_stdio_redirect_vprintf(stdio, true, fmt, args);
+		return;
 	}
+#endif
+	vprintk(fmt, args);
+}
+
+void bch2_print_opts(struct bch_opts *opts, const char *fmt, ...)
+{
+	struct stdio_redirect *stdio = (void *)(unsigned long)opts->stdio;
+
+	va_list args;
+	va_start(args, fmt);
+	bch2_print_maybe_redirect(stdio, fmt, args);
 	va_end(args);
 }
 
@@ -110,14 +117,7 @@ void __bch2_print(struct bch_fs *c, const char *fmt, ...)
 
 	va_list args;
 	va_start(args, fmt);
-	if (likely(!stdio)) {
-		vprintk(fmt, args);
-	} else {
-		if (fmt[0] == KERN_SOH[0])
-			fmt += 2;
-
-		bch2_stdio_redirect_vprintf(stdio, true, fmt, args);
-	}
+	bch2_print_maybe_redirect(stdio, fmt, args);
 	va_end(args);
 }