Patch "unbreak allmodconfig KCONFIG_ALLCONFIG=..." has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

unbreak allmodconfig KCONFIG_ALLCONFIG=...

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
unbreak-allmodconfig-kconfig_allconfig.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Al Viro <[email protected]>
Date: Thu, 14 Jan 2016 18:13:49 +0000
Subject: unbreak allmodconfig KCONFIG_ALLCONFIG=...

From: Al Viro <[email protected]>

commit 6b87b70c5339f30e3c5b32085e69625906513dc2 upstream.

Prior to 3.13 make allmodconfig KCONFIG_ALLCONFIG=/dev/null used
to be equivalent to make allmodconfig; these days it hardwires MODULES to n. In fact, any KCONFIG_ALLCONFIG that doesn't set MODULES explicitly is treated as if it set it to n.

Regression had been introduced by commit cfa98f ("kconfig: do not
override symbols already set"); what happens is that conf_read_simple() does sym_calc_value(modules_sym) on exit, which leaves SYMBOL_VALID set and has conf_set_all_new_symbols() skip modules_sym.

It's pretty easy to fix - simply move that call of sym_calc_value()
into the callers, except for the ones in KCONFIG_ALLCONFIG handling. Objections?

---
 scripts/kconfig/confdata.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

@@ -267,10 +267,8 @@ int conf_read_simple(const char *name, i
 		if (in)
 			goto load;
 		sym_add_change_count(1);
-		if (!sym_defconfig_list) {
-			sym_calc_value(modules_sym);
+		if (!sym_defconfig_list)
 			return 1;
-		}
 
 		for_all_defaults(sym_defconfig_list, prop) {
 			if (expr_calc_value(prop->visible.expr) == no ||

@@ -403,7 +401,6 @@ setsym:
 	}
 	free(line);
 	fclose(in);
-	sym_calc_value(modules_sym);
 	return 0;
 }
 

@@ -414,8 +411,12 @@ int conf_read(const char *name)
 
 	sym_set_change_count(0);
 
-	if (conf_read_simple(name, S_DEF_USER))
+	if (conf_read_simple(name, S_DEF_USER)) {
+		sym_calc_value(modules_sym);
 		return 1;
+	}
+
+	sym_calc_value(modules_sym);
 
 	for_all_symbols(i, sym) {
 		sym_calc_value(sym);

@@ -846,6 +847,7 @@ static int conf_split_config(void)
 
 	name = conf_get_autoconfig_name();
 	conf_read_simple(name, S_DEF_AUTO);
+	sym_calc_value(modules_sym);
 
 	if (chdir("include/config"))
 		return 1;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/unbreak-allmodconfig-kconfig_allconfig.patch