Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
kbuild: check sha1sum just once for each atomic header
It is unneeded to check the sha1sum every time.
Create the timestamp files to manage it.
Add '.' to clean-dirs because 'make clean' must visit ./Kbuild to
clean up the timestamp files.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
+23
-41
+22
-7
Kbuild
+22
-7
Kbuild
···
43
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missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
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$(call cmd,syscalls)
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-
# Check atomic headers are up-to-date
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+
# Check the manual modification of atomic headers
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-
quiet_cmd_atomics = CALL $<
49
-
cmd_atomics = $(CONFIG_SHELL) $<
48
+
quiet_cmd_check_sha1 = CHKSHA1 $<
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+
cmd_check_sha1 = \
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+
if ! command -v sha1sum >/dev/null; then \
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+
echo "warning: cannot check the header due to sha1sum missing"; \
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+
exit 0; \
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+
fi; \
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+
if [ "$$(sed -n '$$s:// ::p' $<)" != \
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+
"$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
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+
echo "error: $< has been modified." >&2; \
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exit 1; \
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+
fi; \
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+
touch $@
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60
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-
PHONY += old-atomics
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-
old-atomics: scripts/atomic/check-atomics.sh
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-
$(call cmd,atomics)
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+
atomic-checks += $(addprefix $(obj)/.checked-, \
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+
atomic-arch-fallback.h \
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+
atomic-instrumented.h \
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+
atomic-long.h)
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+
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+
targets += $(atomic-checks)
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+
$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
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+
$(call if_changed,check_sha1)
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# A phony target that depends on all the preparation targets
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PHONY += prepare
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-
prepare: $(offsets-file) missing-syscalls old-atomics
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+
prepare: $(offsets-file) missing-syscalls $(atomic-checks)
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74
@:
+1
-1
Makefile
+1
-1
Makefile
···
1110
1110
$(libs-y) $(libs-m)))
1111
1111
1112
1112
build-dirs := $(vmlinux-dirs)
1113
-
clean-dirs := $(sort $(vmlinux-dirs) Documentation \
1113
+
clean-dirs := $(sort $(vmlinux-dirs) Documentation . \
1114
1114
$(patsubst %/,%,$(filter %/, $(core-) \
1115
1115
$(drivers-) $(libs-))))
1116
1116
-33
scripts/atomic/check-atomics.sh
-33
scripts/atomic/check-atomics.sh
···
1
-
#!/bin/sh
2
-
# SPDX-License-Identifier: GPL-2.0
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-
#
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# Check if atomic headers are up-to-date
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-
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-
ATOMICDIR=$(dirname $0)
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-
ATOMICTBL=${ATOMICDIR}/atomics.tbl
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LINUXDIR=${ATOMICDIR}/../..
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-
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echo '' | sha1sum - > /dev/null 2>&1
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-
if [ $? -ne 0 ]; then
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printf "sha1sum not available, skipping atomic header checks.\n"
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-
exit 0
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fi
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-
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cat <<EOF |
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linux/atomic/atomic-instrumented.h
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-
linux/atomic/atomic-long.h
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linux/atomic/atomic-arch-fallback.h
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-
EOF
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-
while read header; do
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-
OLDSUM="$(tail -n 1 ${LINUXDIR}/include/${header})"
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-
OLDSUM="${OLDSUM#// }"
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-
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-
NEWSUM="$(sed '$d' ${LINUXDIR}/include/${header} | sha1sum)"
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-
NEWSUM="${NEWSUM%% *}"
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-
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if [ "${OLDSUM}" != "${NEWSUM}" ]; then
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printf "warning: generated include/${header} has been modified.\n"
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-
fi
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done
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-
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exit 0