linux-kernel - [PATCH 4/4] block: move CONFIG

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Date:   Sat, 29 May 2021 03:44:35 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] block: move CONFIG_BLOCK guard to top Makefile

Every object under block/ depends on CONFIG_BLOCK.

Move the guard to the top Makefile since there is no point to
descend into block/ if CONFIG_BLOCK=n.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 Makefile       | 3 ++-
 block/Makefile | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 88cb5b59109c..055dcf5a2704 100644
--- a/Makefile
+++ b/Makefile
@@ -1095,7 +1095,8 @@ export MODORDER := $(extmod_prefix)modules.order
 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
 
 ifeq ($(KBUILD_EXTMOD),)
-core-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
+core-y			+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
+core-$(CONFIG_BLOCK)	+= block/
 
 vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
diff --git a/block/Makefile b/block/Makefile
index 8d841f5f986f..99f0757a3aa5 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -3,7 +3,7 @@
 # Makefile for the kernel block layer
 #
 
-obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-sysfs.o \
+obj-y		:= bio.o elevator.o blk-core.o blk-sysfs.o \
 			blk-flush.o blk-settings.o blk-ioc.o blk-map.o \
 			blk-exec.o blk-merge.o blk-timeout.o \
 			blk-lib.o blk-mq.o blk-mq-tag.o blk-stat.o \
-- 
2.27.0