[PATCH v2] devtools: stop compiler atomics with no C11 equivalent

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

Refrain from using compiler __atomic_{add,and,nand,or,sub,xor}_fetch()
to ease future adoption of C11 standard atomics.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
 devtools/checkpatches.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
index a07bbc8..1b6841b 100755
--- a/devtools/checkpatches.sh
+++ b/devtools/checkpatches.sh
@@ -119,6 +119,14 @@ check_forbidden_additions() { # <patch>
 		-f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
 		"$1" || res=1
 
+	# refrain from using compiler __atomic_{add,and,nand,or,sub,xor}_fetch()
+	awk -v FOLDERS="lib drivers app examples" \
+		-v EXPRESSIONS="__atomic_(add|and|nand|or|sub|xor)_fetch\\\(" \
+		-v RET_ON_FAIL=1 \
+		-v MESSAGE='Using __atomic_op_fetch use __atomic_fetch_op instead' \
+		-f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
+		"$1" || res=1
+
 	# forbid use of __reserved which is a reserved keyword in Windows system headers
 	awk -v FOLDERS="lib drivers app examples" \
 		-v EXPRESSIONS='\\<__reserved\\>' \
-- 
1.8.3.1