linux-kernel - [PATCH] sh: decompressor: do not copy source files while building

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Date:   Sun, 31 Oct 2021 02:56:04 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org, patches@....linux.org.uk
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Rich Felker <dalias@...c.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org
Subject: [PATCH] sh: decompressor: do not copy source files while building

As commit 7ae4a78daacf ("ARM: 8969/1: decompressor: simplify libfdt
builds") stated, copying source files during the build time may not
end up with as clean code as expected.

Do similar for sh to clean up the Makefile and .gitignore.

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

 arch/sh/boot/compressed/.gitignore |  5 -----
 arch/sh/boot/compressed/Makefile   | 24 ++++++------------------
 arch/sh/boot/compressed/ashiftrt.S |  2 ++
 arch/sh/boot/compressed/ashldi3.c  |  2 ++
 arch/sh/boot/compressed/ashlsi3.S  |  2 ++
 arch/sh/boot/compressed/ashrsi3.S  |  2 ++
 arch/sh/boot/compressed/lshrsi3.S  |  2 ++
 scripts/remove-stale-files         |  5 +++++
 8 files changed, 21 insertions(+), 23 deletions(-)
 create mode 100644 arch/sh/boot/compressed/ashiftrt.S
 create mode 100644 arch/sh/boot/compressed/ashldi3.c
 create mode 100644 arch/sh/boot/compressed/ashlsi3.S
 create mode 100644 arch/sh/boot/compressed/ashrsi3.S
 create mode 100644 arch/sh/boot/compressed/lshrsi3.S

diff --git a/arch/sh/boot/compressed/.gitignore b/arch/sh/boot/compressed/.gitignore
index 37aa53057369..cd16663bc7c8 100644
--- a/arch/sh/boot/compressed/.gitignore
+++ b/arch/sh/boot/compressed/.gitignore
@@ -1,7 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
-ashiftrt.S
-ashldi3.c
-ashlsi3.S
-ashrsi3.S
-lshrsi3.S
 vmlinux.bin.*
diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
index 589d2d8a573d..2f53babd9249 100644
--- a/arch/sh/boot/compressed/Makefile
+++ b/arch/sh/boot/compressed/Makefile
@@ -5,12 +5,12 @@
 # create a compressed vmlinux image from the original vmlinux
 #
 
+OBJECTS := head_32.o misc.o cache.o piggy.o \
+	   ashiftrt.o ashldi3.o ashrsi3.o ashlsi3.o lshrsi3.o
+
 targets		:= vmlinux vmlinux.bin vmlinux.bin.gz \
 		   vmlinux.bin.bz2 vmlinux.bin.lzma \
-		   vmlinux.bin.xz vmlinux.bin.lzo \
-		   head_32.o misc.o piggy.o
-
-OBJECTS = $(obj)/head_32.o $(obj)/misc.o $(obj)/cache.o
+		   vmlinux.bin.xz vmlinux.bin.lzo $(OBJECTS)
 
 GCOV_PROFILE := n
 
@@ -33,21 +33,9 @@ ccflags-remove-$(CONFIG_MCOUNT) += -pg
 LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_OFFSET) -e startup \
 		   -T $(obj)/../../kernel/vmlinux.lds
 
-#
-# Pull in the necessary libgcc bits from the in-kernel implementation.
-#
-lib1funcs-y	:= ashiftrt.S ashldi3.c ashrsi3.S ashlsi3.S lshrsi3.S
-lib1funcs-obj   := \
-	$(addsuffix .o, $(basename $(addprefix $(obj)/, $(lib1funcs-y))))
-
-lib1funcs-dir		:= $(srctree)/arch/$(SRCARCH)/lib
-
-KBUILD_CFLAGS += -I$(lib1funcs-dir) -DDISABLE_BRANCH_PROFILING
-
-$(addprefix $(obj)/,$(lib1funcs-y)): $(obj)/%: $(lib1funcs-dir)/% FORCE
-	$(call cmd,shipped)
+KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 
-$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(lib1funcs-obj) FORCE
+$(obj)/vmlinux: $(addprefix $(obj)/, $(OBJECTS)) FORCE
 	$(call if_changed,ld)
 
 $(obj)/vmlinux.bin: vmlinux FORCE
diff --git a/arch/sh/boot/compressed/ashiftrt.S b/arch/sh/boot/compressed/ashiftrt.S
new file mode 100644
index 000000000000..0f3b291a3f4b
--- /dev/null
+++ b/arch/sh/boot/compressed/ashiftrt.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashiftrt.S"
diff --git a/arch/sh/boot/compressed/ashldi3.c b/arch/sh/boot/compressed/ashldi3.c
new file mode 100644
index 000000000000..7cebd646df83
--- /dev/null
+++ b/arch/sh/boot/compressed/ashldi3.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include "../../lib/ashldi3.c"
diff --git a/arch/sh/boot/compressed/ashlsi3.S b/arch/sh/boot/compressed/ashlsi3.S
new file mode 100644
index 000000000000..e354262b275f
--- /dev/null
+++ b/arch/sh/boot/compressed/ashlsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashlsi3.S"
diff --git a/arch/sh/boot/compressed/ashrsi3.S b/arch/sh/boot/compressed/ashrsi3.S
new file mode 100644
index 000000000000..e564be9a4dcd
--- /dev/null
+++ b/arch/sh/boot/compressed/ashrsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashrsi3.S"
diff --git a/arch/sh/boot/compressed/lshrsi3.S b/arch/sh/boot/compressed/lshrsi3.S
new file mode 100644
index 000000000000..5a8281b7e516
--- /dev/null
+++ b/arch/sh/boot/compressed/lshrsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/lshrsi3.S"
diff --git a/scripts/remove-stale-files b/scripts/remove-stale-files
index eb630ee287c3..ad5ba3ee1f5e 100755
--- a/scripts/remove-stale-files
+++ b/scripts/remove-stale-files
@@ -28,4 +28,9 @@ if [ -n "${building_out_of_srctree}" ]; then
 	do
 		rm -f arch/arm/boot/compressed/${f}
 	done
+
+	for f in ashiftrt.S ashldi3.c ashrsi3.S ashlsi3.S lshrsi3.S
+	do
+		rm -f arch/sh/boot/compressed/${f}
+	done
 fi
-- 
2.30.2