linux-kernel - [PATCH 2/3] kbuild: generate modules.order only in directories visited by obj-y/m

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Message-Id: <20190806100323.22919-2-yamada.masahiro@socionext.com>
Date:   Tue,  6 Aug 2019 19:03:22 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        Tom Stonecypher <thomas.edwardx.stonecypher@...el.com>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: [PATCH 2/3] kbuild: generate modules.order only in directories visited by obj-y/m

The modules.order files in directories visited by the chain of obj-y
or obj-m are merged to the upper-level ones, and become parts of the
top-level modules.order. On the other hand, there is no need to
generate modules.order in directories visited by subdir-y or subdir-m.
They would become orphan anyway.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/Makefile.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 3fe0c73e002c..37a1d2cd49d4 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -488,7 +488,8 @@ targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
 PHONY += $(subdir-ym)
 $(subdir-ym):
 	$(Q)$(MAKE) $(build)=$@ \
-	need-builtin=$(if $(filter $@...ilt-in.a, $(subdir-obj-y)),1)
+	need-builtin=$(if $(filter $@...ilt-in.a, $(subdir-obj-y)),1) \
+	need-modorder=$(if $(need-modorder),$(if $(filter $@...dules.order, $(modorder)),1))
 
 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
 # ---------------------------------------------------------------------------
-- 
2.17.1