locking/atomic: scripts: factor out order template generation

Currently gen_proto_order_variants() hard codes the path for the templates used
for order fallbacks. Factor this out into a helper so that it can be reused
elsewhere.

This results in no change to the generated headers, so there should be
no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-17-mark.rutland@arm.com

scripts/atomic/gen-atomic-fallback.sh

@@ -32,6 +32,20 @@ gen_template_fallback()
 	fi
 }
 
+#gen_order_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
+gen_order_fallback()
+{
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+
+	local tmpl_order=${order#_}
+	local tmpl="${ATOMICDIR}/fallbacks/${tmpl_order:-fence}"
+	gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
+}
+
 #gen_proto_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
 gen_proto_fallback()
 {
@@ -56,20 +70,6 @@ cat << EOF
 EOF
 }
 
-gen_proto_order_variant()
-{
-	local meta="$1"; shift
-	local pfx="$1"; shift
-	local name="$1"; shift
-	local sfx="$1"; shift
-	local order="$1"; shift
-	local atomic="$1"
-
-	local basename="arch_${atomic}_${pfx}${name}${sfx}"
-
-	printf "#define ${basename}${order} ${basename}${order}\n"
-}
-
 #gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...)
 gen_proto_order_variants()
 {
@@ -117,9 +117,9 @@ gen_proto_order_variants()
 
 	printf "#else /* ${basename}_relaxed */\n\n"
 
-	gen_template_fallback "${ATOMICDIR}/fallbacks/acquire"  "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
-	gen_template_fallback "${ATOMICDIR}/fallbacks/release"  "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
-	gen_template_fallback "${ATOMICDIR}/fallbacks/fence"  "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
+	gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
+	gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
+	gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
 
 	printf "#endif /* ${basename}_relaxed */\n\n"
 }