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 <roret...@linux.microsoft.com>
---
 devtools/checkpatches.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
index 1dee094..1ed6d51 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_{add,and,nand,or,sub,xor}_fetch' \
+               -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

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