kconfig: add fflush() before ferror() check

As David Laight pointed out, there is not much point in calling
ferror() unless you call fflush() first.

Reported-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index d3c3a61..94dcec2 100644 (file)
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -979,6 +979,7 @@ static int conf_write_autoconf_cmd(const char *autoconf_name)
 
        fprintf(out, "\n$(deps_config): ;\n");
 
+       fflush(out);
        ret = ferror(out); /* error check for all fprintf() calls */
        fclose(out);
        if (ret)
@@ -1097,6 +1098,7 @@ static int __conf_write_autoconf(const char *filename,
                if ((sym->flags & SYMBOL_WRITE) && sym->name)
                        print_symbol(file, sym);
 
+       fflush(file);
        /* check possible errors in conf_write_heading() and print_symbol() */
        ret = ferror(file);
        fclose(file);