1 files changed, 34 insertions, 0 deletions
diff --git a/scripts/atomic/check-atomics.sh b/scripts/atomic/check-atomics.sh
new file mode 100755
index 000000000..82748d42e
--- /dev/null
+++ b/scripts/atomic/check-atomics.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Check if atomic headers are up-to-date
+
+ATOMICDIR=$(dirname $0)
+ATOMICTBL=${ATOMICDIR}/atomics.tbl
+LINUXDIR=${ATOMICDIR}/../..
+
+echo '' | sha1sum - > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+	printf "sha1sum not available, skipping atomic header checks.\n"
+	exit 0
+fi
+
+cat <<EOF |
+asm-generic/atomic-instrumented.h
+asm-generic/atomic-long.h
+linux/atomic-arch-fallback.h
+linux/atomic-fallback.h
+EOF
+while read header; do
+	OLDSUM="$(tail -n 1 ${LINUXDIR}/include/${header})"
+	OLDSUM="${OLDSUM#// }"
+
+	NEWSUM="$(sed '$d' ${LINUXDIR}/include/${header} | sha1sum)"
+	NEWSUM="${NEWSUM%% *}"
+
+	if [ "${OLDSUM}" != "${NEWSUM}" ]; then
+		printf "warning: generated include/${header} has been modified.\n"
+	fi
+done
+
+exit 0