Resguardo inicial

linux-7.2.3/scripts/atomic/atomic-tbl.sh

@@ -0,0 +1,290 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# helpers for dealing with atomics.tbl
+
+#meta_in(meta, match)
+meta_in()
+{
+	case "$1" in
+	[$2]) return 0;;
+	esac
+
+	return 1
+}
+
+#meta_has_ret(meta)
+meta_has_ret()
+{
+	meta_in "$1" "bBiIfFlR"
+}
+
+#meta_has_acquire(meta)
+meta_has_acquire()
+{
+	meta_in "$1" "BFIlR"
+}
+
+#meta_has_release(meta)
+meta_has_release()
+{
+	meta_in "$1" "BFIRs"
+}
+
+#meta_has_relaxed(meta)
+meta_has_relaxed()
+{
+	meta_in "$1" "BFIR"
+}
+
+#meta_is_implicitly_relaxed(meta)
+meta_is_implicitly_relaxed()
+{
+	meta_in "$1" "vls"
+}
+
+#find_template(tmpltype, pfx, name, sfx, order)
+find_template()
+{
+	local tmpltype="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+
+	local base=""
+	local file=""
+
+	# We may have fallbacks for a specific case (e.g. read_acquire()), or
+	# an entire class, e.g. *inc*().
+	#
+	# Start at the most specific, and fall back to the most general. Once
+	# we find a specific fallback, don't bother looking for more.
+	for base in "${pfx}${name}${sfx}${order}" "${pfx}${name}${sfx}" "${name}"; do
+		file="${ATOMICDIR}/${tmpltype}/${base}"
+
+		if [ -f "${file}" ]; then
+			printf "${file}"
+			break
+		fi
+	done
+}
+
+#find_fallback_template(pfx, name, sfx, order)
+find_fallback_template()
+{
+	find_template "fallbacks" "$@"
+}
+
+#find_kerneldoc_template(pfx, name, sfx, order)
+find_kerneldoc_template()
+{
+	find_template "kerneldoc" "$@"
+}
+
+#gen_ret_type(meta, int)
+gen_ret_type() {
+	local meta="$1"; shift
+	local int="$1"; shift
+
+	case "${meta}" in
+	[sv]) printf "void";;
+	[bB]) printf "bool";;
+	[aiIfFlR]) printf "${int}";;
+	esac
+}
+
+#gen_ret_stmt(meta)
+gen_ret_stmt()
+{
+	if meta_has_ret "${meta}"; then
+		printf "return ";
+	fi
+}
+
+# gen_param_name(arg)
+gen_param_name()
+{
+	# strip off the leading 'c' for 'cv'
+	local name="${1#c}"
+	printf "${name#*:}"
+}
+
+# gen_param_type(arg, int, atomic)
+gen_param_type()
+{
+	local type="${1%%:*}"; shift
+	local int="$1"; shift
+	local atomic="$1"; shift
+
+	case "${type}" in
+	i) type="${int} ";;
+	p) type="${int} *";;
+	v) type="${atomic}_t *";;
+	cv) type="const ${atomic}_t *";;
+	esac
+
+	printf "${type}"
+}
+
+#gen_param(arg, int, atomic)
+gen_param()
+{
+	local arg="$1"; shift
+	local int="$1"; shift
+	local atomic="$1"; shift
+	local name="$(gen_param_name "${arg}")"
+	local type="$(gen_param_type "${arg}" "${int}" "${atomic}")"
+
+	printf "${type}${name}"
+}
+
+#gen_params(int, atomic, arg...)
+gen_params()
+{
+	local int="$1"; shift
+	local atomic="$1"; shift
+
+	while [ "$#" -gt 0 ]; do
+		gen_param "$1" "${int}" "${atomic}"
+		[ "$#" -gt 1 ] && printf ", "
+		shift;
+	done
+}
+
+#gen_args(arg...)
+gen_args()
+{
+	while [ "$#" -gt 0 ]; do
+		printf "$(gen_param_name "$1")"
+		[ "$#" -gt 1 ] && printf ", "
+		shift;
+	done
+}
+
+#gen_desc_return(meta)
+gen_desc_return()
+{
+	local meta="$1"; shift
+
+	case "${meta}" in
+	[v])
+		printf "Return: Nothing."
+		;;
+	[Ff])
+		printf "Return: The original value of @v."
+		;;
+	[R])
+		printf "Return: The updated value of @v."
+		;;
+	[l])
+		printf "Return: The value of @v."
+		;;
+	esac
+}
+
+#gen_template_kerneldoc(template, class, meta, pfx, name, sfx, order, atomic, int, args...)
+gen_template_kerneldoc()
+{
+	local template="$1"; shift
+	local class="$1"; shift
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+	local atomic="$1"; shift
+	local int="$1"; shift
+
+	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
+
+	local ret="$(gen_ret_type "${meta}" "${int}")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+	local params="$(gen_params "${int}" "${atomic}" "$@")"
+	local args="$(gen_args "$@")"
+	local desc_order=""
+	local desc_instrumentation=""
+	local desc_return=""
+
+	if [ ! -z "${order}" ]; then
+		desc_order="${order##_}"
+	elif meta_is_implicitly_relaxed "${meta}"; then
+		desc_order="relaxed"
+	else
+		desc_order="full"
+	fi
+
+	if [ -z "${class}" ]; then
+		desc_noinstr="Unsafe to use in noinstr code; use raw_${atomicname}() there."
+	else
+		desc_noinstr="Safe to use in noinstr code; prefer ${atomicname}() elsewhere."
+	fi
+
+	desc_return="$(gen_desc_return "${meta}")"
+
+	. ${template}
+}
+
+#gen_kerneldoc(class, meta, pfx, name, sfx, order, atomic, int, args...)
+gen_kerneldoc()
+{
+	local class="$1"; shift
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+
+	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
+
+	local tmpl="$(find_kerneldoc_template "${pfx}" "${name}" "${sfx}" "${order}")"
+	if [ -z "${tmpl}" ]; then
+		printf "/*\n"
+		printf " * No kerneldoc available for ${class}${atomicname}\n"
+		printf " */\n"
+	else
+	gen_template_kerneldoc "${tmpl}" "${class}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
+	fi
+}
+
+#gen_proto_order_variants(meta, pfx, name, sfx, ...)
+gen_proto_order_variants()
+{
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+
+	gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
+
+	if meta_has_acquire "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
+	fi
+	if meta_has_release "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
+	fi
+	if meta_has_relaxed "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
+	fi
+}
+
+#gen_proto_variants(meta, name, ...)
+gen_proto_variants()
+{
+	local meta="$1"; shift
+	local name="$1"; shift
+	local pfx=""
+	local sfx=""
+
+	meta_in "${meta}" "fF" && pfx="fetch_"
+	meta_in "${meta}" "R" && sfx="_return"
+
+	gen_proto_order_variants "${meta}" "${pfx}" "${name}" "${sfx}" "$@"
+}
+
+#gen_proto(meta, ...)
+gen_proto() {
+	local meta="$1"; shift
+	for m in $(echo "${meta}" | grep -o .); do
+		gen_proto_variants "${m}" "$@"
+	done
+}

linux-7.2.3/scripts/atomic/atomics.tbl

@@ -0,0 +1,41 @@
+# name	meta	args...
+#
+# Where meta contains a string of variants to generate.
+# Upper-case implies _{acquire,release,relaxed} variants.
+# Valid meta values are:
+# * B/b	- bool: returns bool
+# * v	- void: returns void
+# * I/i	- int: returns base type
+# * R	- return: returns base type (has _return variants)
+# * F/f	- fetch: returns base type (has fetch_ variants)
+# * l	- load: returns base type (has _acquire order variant)
+# * s	- store: returns void (has _release order variant)
+#
+# Where args contains list of type[:name], where type is:
+# * cv	- const pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t)
+# * v	- pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t)
+# * i	- base type (int/s64/long)
+# * p	- pointer to base type (int/s64/long)
+#
+read			l	cv
+set			s	v	i
+add			vRF	i	v
+sub			vRF	i	v
+inc			vRF	v
+dec			vRF	v
+and			vF	i	v
+andnot			vF	i	v
+or			vF	i	v
+xor			vF	i	v
+xchg			I	v	i:new
+cmpxchg			I	v	i:old	i:new
+try_cmpxchg		B	v	p:old	i:new
+sub_and_test		b	i	v
+dec_and_test		b	v
+inc_and_test		b	v
+add_negative		B	i	v
+add_unless		fb	v	i:a	i:u
+inc_not_zero		b	v
+inc_unless_negative	b	v
+dec_unless_positive	b	v
+dec_if_positive		i	v

linux-7.2.3/scripts/atomic/fallbacks/acquire

@@ -0,0 +1,5 @@
+cat <<EOF
+	${ret} ret = arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
+	__atomic_acquire_fence();
+	return ret;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/add_negative

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_${atomic}_add_return${order}(i, v) < 0;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/add_unless

@@ -0,0 +1,3 @@
+cat << EOF
+	return raw_${atomic}_fetch_add_unless(v, a, u) != u;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/andnot

@@ -0,0 +1,3 @@
+cat <<EOF
+	${retstmt}raw_${atomic}_${pfx}and${sfx}${order}(~i, v);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/cmpxchg

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_cmpxchg${order}(&v->counter, old, new);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/dec

@@ -0,0 +1,3 @@
+cat <<EOF
+	${retstmt}raw_${atomic}_${pfx}sub${sfx}${order}(1, v);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/dec_and_test

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_${atomic}_dec_return(v) == 0;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/dec_if_positive

@@ -0,0 +1,11 @@
+cat <<EOF
+	${int} dec, c = raw_${atomic}_read(v);
+
+	do {
+		dec = c - 1;
+		if (unlikely(dec < 0))
+			break;
+	} while (!raw_${atomic}_try_cmpxchg(v, &c, dec));
+
+	return dec;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/dec_unless_positive

@@ -0,0 +1,10 @@
+cat <<EOF
+	${int} c = raw_${atomic}_read(v);
+
+	do {
+		if (unlikely(c > 0))
+			return false;
+	} while (!raw_${atomic}_try_cmpxchg(v, &c, c - 1));
+
+	return true;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/fence

@@ -0,0 +1,7 @@
+cat <<EOF
+	${ret} ret;
+	__atomic_pre_full_fence();
+	ret = arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
+	__atomic_post_full_fence();
+	return ret;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/fetch_add_unless

@@ -0,0 +1,10 @@
+cat << EOF
+	${int} c = raw_${atomic}_read(v);
+
+	do {
+		if (unlikely(c == u))
+			break;
+	} while (!raw_${atomic}_try_cmpxchg(v, &c, c + a));
+
+	return c;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/inc

@@ -0,0 +1,3 @@
+cat <<EOF
+	${retstmt}raw_${atomic}_${pfx}add${sfx}${order}(1, v);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/inc_and_test

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_${atomic}_inc_return(v) == 0;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/inc_not_zero

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_${atomic}_add_unless(v, 1, 0);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/inc_unless_negative

@@ -0,0 +1,10 @@
+cat <<EOF
+	${int} c = raw_${atomic}_read(v);
+
+	do {
+		if (unlikely(c < 0))
+			return false;
+	} while (!raw_${atomic}_try_cmpxchg(v, &c, c + 1));
+
+	return true;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/read_acquire

@@ -0,0 +1,12 @@
+cat <<EOF
+	${int} ret;
+
+	if (__native_word(${atomic}_t)) {
+		ret = smp_load_acquire(&(v)->counter);
+	} else {
+		ret = raw_${atomic}_read(v);
+		__atomic_acquire_fence();
+	}
+
+	return ret;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/release

@@ -0,0 +1,4 @@
+cat <<EOF
+	__atomic_release_fence();
+	${retstmt}arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
+EOF

linux-7.2.3/scripts/atomic/fallbacks/set_release

@@ -0,0 +1,8 @@
+cat <<EOF
+	if (__native_word(${atomic}_t)) {
+		smp_store_release(&(v)->counter, i);
+	} else {
+		__atomic_release_fence();
+		raw_${atomic}_set(v, i);
+	}
+EOF

linux-7.2.3/scripts/atomic/fallbacks/sub_and_test

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_${atomic}_sub_return(i, v) == 0;
+EOF

linux-7.2.3/scripts/atomic/fallbacks/try_cmpxchg

@@ -0,0 +1,7 @@
+cat <<EOF
+	${int} r, o = *old;
+	r = raw_${atomic}_cmpxchg${order}(v, o, new);
+	if (unlikely(r != o))
+		*old = r;
+	return likely(r == o);
+EOF

linux-7.2.3/scripts/atomic/fallbacks/xchg

@@ -0,0 +1,3 @@
+cat <<EOF
+	return raw_xchg${order}(&v->counter, new);
+EOF

linux-7.2.3/scripts/atomic/gen-atomic-fallback.sh

@@ -0,0 +1,336 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+ATOMICDIR=$(dirname $0)
+
+. ${ATOMICDIR}/atomic-tbl.sh
+
+#gen_template_fallback(template, meta, pfx, name, sfx, order, atomic, int, args...)
+gen_template_fallback()
+{
+	local template="$1"; shift
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+	local atomic="$1"; shift
+	local int="$1"; shift
+
+	local ret="$(gen_ret_type "${meta}" "${int}")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+	local params="$(gen_params "${int}" "${atomic}" "$@")"
+	local args="$(gen_args "$@")"
+
+	. ${template}
+}
+
+#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()
+{
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+
+	local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
+	gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
+}
+
+#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, args...)
+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"; shift
+	local int="$1"; shift
+
+	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
+	local basename="${atomic}_${pfx}${name}${sfx}"
+
+	local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
+
+	local ret="$(gen_ret_type "${meta}" "${int}")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+	local params="$(gen_params "${int}" "${atomic}" "$@")"
+	local args="$(gen_args "$@")"
+
+	gen_kerneldoc "raw_" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
+
+	printf "static __always_inline ${ret}\n"
+	printf "raw_${atomicname}(${params})\n"
+	printf "{\n"
+
+	# Where there is no possible fallback, this order variant is mandatory
+	# and must be provided by arch code. Add a comment to the header to
+	# make this obvious.
+	#
+	# Ideally we'd error on a missing definition, but arch code might
+	# define this order variant as a C function without a preprocessor
+	# symbol.
+	if [ -z ${template} ] && [ -z "${order}" ] && ! meta_has_relaxed "${meta}"; then
+		printf "\t${retstmt}arch_${atomicname}(${args});\n"
+		printf "}\n\n"
+		return
+	fi
+
+	printf "#if defined(arch_${atomicname})\n"
+	printf "\t${retstmt}arch_${atomicname}(${args});\n"
+
+	# Allow FULL/ACQUIRE/RELEASE ops to be defined in terms of RELAXED ops
+	if [ "${order}" != "_relaxed" ] && meta_has_relaxed "${meta}"; then
+		printf "#elif defined(arch_${basename}_relaxed)\n"
+		gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
+	fi
+
+	# Allow ACQUIRE/RELEASE/RELAXED ops to be defined in terms of FULL ops
+	if [ ! -z "${order}" ] && ! meta_is_implicitly_relaxed "${meta}"; then
+		printf "#elif defined(arch_${basename})\n"
+		printf "\t${retstmt}arch_${basename}(${args});\n"
+	fi
+
+	printf "#else\n"
+	if [ ! -z "${template}" ]; then
+		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
+	else
+		printf "#error \"Unable to define raw_${atomicname}\"\n"
+	fi
+
+	printf "#endif\n"
+	printf "}\n\n"
+}
+
+
+#gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...)
+gen_proto_order_variants()
+{
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local atomic="$1"
+
+	gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
+
+	if meta_has_acquire "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
+	fi
+
+	if meta_has_release "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
+	fi
+
+	if meta_has_relaxed "${meta}"; then
+		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
+	fi
+}
+
+#gen_basic_fallbacks(basename)
+gen_basic_fallbacks()
+{
+	local basename="$1"; shift
+cat << EOF
+#define raw_${basename}_acquire arch_${basename}
+#define raw_${basename}_release arch_${basename}
+#define raw_${basename}_relaxed arch_${basename}
+EOF
+}
+
+gen_order_fallbacks()
+{
+	local xchg="$1"; shift
+
+cat <<EOF
+
+#define raw_${xchg}_relaxed arch_${xchg}_relaxed
+
+#ifdef arch_${xchg}_acquire
+#define raw_${xchg}_acquire arch_${xchg}_acquire
+#else
+#define raw_${xchg}_acquire(...) \\
+	__atomic_op_acquire(arch_${xchg}, __VA_ARGS__)
+#endif
+
+#ifdef arch_${xchg}_release
+#define raw_${xchg}_release arch_${xchg}_release
+#else
+#define raw_${xchg}_release(...) \\
+	__atomic_op_release(arch_${xchg}, __VA_ARGS__)
+#endif
+
+#ifdef arch_${xchg}
+#define raw_${xchg} arch_${xchg}
+#else
+#define raw_${xchg}(...) \\
+	__atomic_op_fence(arch_${xchg}, __VA_ARGS__)
+#endif
+
+EOF
+}
+
+gen_xchg_order_fallback()
+{
+	local xchg="$1"; shift
+	local order="$1"; shift
+	local forder="${order:-_fence}"
+
+	printf "#if defined(arch_${xchg}${order})\n"
+	printf "#define raw_${xchg}${order} arch_${xchg}${order}\n"
+
+	if [ "${order}" != "_relaxed" ]; then
+		printf "#elif defined(arch_${xchg}_relaxed)\n"
+		printf "#define raw_${xchg}${order}(...) \\\\\n"
+		printf "	__atomic_op${forder}(arch_${xchg}, __VA_ARGS__)\n"
+	fi
+
+	if [ ! -z "${order}" ]; then
+		printf "#elif defined(arch_${xchg})\n"
+		printf "#define raw_${xchg}${order} arch_${xchg}\n"
+	fi
+
+	printf "#else\n"
+	printf "extern void raw_${xchg}${order}_not_implemented(void);\n"
+	printf "#define raw_${xchg}${order}(...) raw_${xchg}${order}_not_implemented()\n"
+	printf "#endif\n\n"
+}
+
+gen_xchg_fallbacks()
+{
+	local xchg="$1"; shift
+
+	for order in "" "_acquire" "_release" "_relaxed"; do
+		gen_xchg_order_fallback "${xchg}" "${order}"
+	done
+}
+
+gen_try_cmpxchg_fallback()
+{
+	local prefix="$1"; shift
+	local cmpxchg="$1"; shift;
+	local suffix="$1"; shift;
+
+cat <<EOF
+#define raw_${prefix}try_${cmpxchg}${suffix}(_ptr, _oldp, _new) \\
+({ \\
+	typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \\
+	___r = raw_${prefix}${cmpxchg}${suffix}((_ptr), ___o, (_new)); \\
+	if (unlikely(___r != ___o)) \\
+		*___op = ___r; \\
+	likely(___r == ___o); \\
+})
+EOF
+}
+
+gen_try_cmpxchg_order_fallback()
+{
+	local cmpxchg="$1"; shift
+	local order="$1"; shift
+	local forder="${order:-_fence}"
+
+	printf "#if defined(arch_try_${cmpxchg}${order})\n"
+	printf "#define raw_try_${cmpxchg}${order} arch_try_${cmpxchg}${order}\n"
+
+	if [ "${order}" != "_relaxed" ]; then
+		printf "#elif defined(arch_try_${cmpxchg}_relaxed)\n"
+		printf "#define raw_try_${cmpxchg}${order}(...) \\\\\n"
+		printf "	__atomic_op${forder}(arch_try_${cmpxchg}, __VA_ARGS__)\n"
+	fi
+
+	if [ ! -z "${order}" ]; then
+		printf "#elif defined(arch_try_${cmpxchg})\n"
+		printf "#define raw_try_${cmpxchg}${order} arch_try_${cmpxchg}\n"
+	fi
+
+	printf "#else\n"
+	gen_try_cmpxchg_fallback "" "${cmpxchg}" "${order}"
+	printf "#endif\n\n"
+}
+
+gen_try_cmpxchg_order_fallbacks()
+{
+	local cmpxchg="$1"; shift;
+
+	for order in "" "_acquire" "_release" "_relaxed"; do
+		gen_try_cmpxchg_order_fallback "${cmpxchg}" "${order}"
+	done
+}
+
+gen_def_and_try_cmpxchg_fallback()
+{
+	local prefix="$1"; shift
+	local cmpxchg="$1"; shift
+	local suffix="$1"; shift
+
+	printf "#define raw_${prefix}${cmpxchg}${suffix} arch_${prefix}${cmpxchg}${suffix}\n\n"
+	printf "#ifdef arch_${prefix}try_${cmpxchg}${suffix}\n"
+	printf "#define raw_${prefix}try_${cmpxchg}${suffix} arch_${prefix}try_${cmpxchg}${suffix}\n"
+	printf "#else\n"
+	gen_try_cmpxchg_fallback "${prefix}" "${cmpxchg}" "${suffix}"
+	printf "#endif\n\n"
+}
+
+cat << EOF
+// SPDX-License-Identifier: GPL-2.0
+
+// Generated by $0
+// DO NOT MODIFY THIS FILE DIRECTLY
+
+#ifndef _LINUX_ATOMIC_FALLBACK_H
+#define _LINUX_ATOMIC_FALLBACK_H
+
+#include <linux/compiler.h>
+
+EOF
+
+for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128"; do
+	gen_xchg_fallbacks "${xchg}"
+done
+
+for cmpxchg in "cmpxchg" "cmpxchg64" "cmpxchg128"; do
+	gen_try_cmpxchg_order_fallbacks "${cmpxchg}"
+done
+
+for cmpxchg in "cmpxchg" "cmpxchg64" "cmpxchg128"; do
+	gen_def_and_try_cmpxchg_fallback "" "${cmpxchg}" "_local"
+done
+
+for cmpxchg in "cmpxchg"; do
+	gen_def_and_try_cmpxchg_fallback "sync_" "${cmpxchg}" ""
+done
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic" "int" ${args}
+done
+
+cat <<EOF
+#ifdef CONFIG_GENERIC_ATOMIC64
+#include <asm-generic/atomic64.h>
+#endif
+
+EOF
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
+done
+
+cat <<EOF
+#endif /* _LINUX_ATOMIC_FALLBACK_H */
+EOF

linux-7.2.3/scripts/atomic/gen-atomic-instrumented.sh

@@ -0,0 +1,184 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+ATOMICDIR=$(dirname $0)
+
+. ${ATOMICDIR}/atomic-tbl.sh
+
+#gen_param_check(meta, arg)
+gen_param_check()
+{
+	local meta="$1"; shift
+	local arg="$1"; shift
+	local type="${arg%%:*}"
+	local name="$(gen_param_name "${arg}")"
+	local rw="atomic_write"
+
+	case "${type#c}" in
+	i) return;;
+	esac
+
+	if [ ${type#c} != ${type} ]; then
+		# We don't write to constant parameters.
+		rw="atomic_read"
+	elif [ "${type}" = "p" ] ; then
+		# The "old" argument in try_cmpxchg() gets accessed non-atomically
+		rw="read_write"
+	elif [ "${meta}" != "s" ]; then
+		# An atomic RMW: if this parameter is not a constant, and this atomic is
+		# not just a 's'tore, this parameter is both read from and written to.
+		rw="atomic_read_write"
+	fi
+
+	printf "\tinstrument_${rw}(${name}, sizeof(*${name}));\n"
+}
+
+#gen_params_checks(meta, arg...)
+gen_params_checks()
+{
+	local meta="$1"; shift
+	local order="$1"; shift
+
+	if [ "${order}" = "_release" ]; then
+		printf "\tkcsan_release();\n"
+	elif [ -z "${order}" ] && ! meta_in "$meta" "slv"; then
+		# RMW with return value is fully ordered
+		printf "\tkcsan_mb();\n"
+	fi
+
+	while [ "$#" -gt 0 ]; do
+		gen_param_check "$meta" "$1"
+		shift;
+	done
+}
+
+#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
+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"; shift
+	local int="$1"; shift
+
+	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
+
+	local ret="$(gen_ret_type "${meta}" "${int}")"
+	local params="$(gen_params "${int}" "${atomic}" "$@")"
+	local checks="$(gen_params_checks "${meta}" "${order}" "$@")"
+	local args="$(gen_args "$@")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+
+	gen_kerneldoc "" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
+
+cat <<EOF
+static __always_inline ${ret}
+${atomicname}(${params})
+{
+${checks}
+	${retstmt}raw_${atomicname}(${args});
+}
+EOF
+
+	printf "\n"
+}
+
+gen_xchg()
+{
+	local xchg="$1"; shift
+	local order="$1"; shift
+
+	kcsan_barrier=""
+	if [ "${xchg%_local}" = "${xchg}" ]; then
+		case "$order" in
+		_release)	kcsan_barrier="kcsan_release()" ;;
+		"")			kcsan_barrier="kcsan_mb()" ;;
+		esac
+	fi
+
+	if [ "${xchg%${xchg#try_cmpxchg}}" = "try_cmpxchg" ] ; then
+
+cat <<EOF
+#define ${xchg}${order}(ptr, oldp, ...) \\
+({ \\
+	typeof(ptr) __ai_ptr = (ptr); \\
+	typeof(oldp) __ai_oldp = (oldp); \\
+EOF
+[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
+cat <<EOF
+	instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
+	instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \\
+	raw_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\
+})
+EOF
+
+	else
+
+cat <<EOF
+#define ${xchg}${order}(ptr, ...) \\
+({ \\
+	typeof(ptr) __ai_ptr = (ptr); \\
+EOF
+[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
+cat <<EOF
+	instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
+	raw_${xchg}${order}(__ai_ptr, __VA_ARGS__); \\
+})
+EOF
+
+	fi
+}
+
+cat << EOF
+// SPDX-License-Identifier: GPL-2.0
+
+// Generated by $0
+// DO NOT MODIFY THIS FILE DIRECTLY
+
+/*
+ * This file provoides atomic operations with explicit instrumentation (e.g.
+ * KASAN, KCSAN), which should be used unless it is necessary to avoid
+ * instrumentation. Where it is necessary to aovid instrumenation, the
+ * raw_atomic*() operations should be used.
+ */
+#ifndef _LINUX_ATOMIC_INSTRUMENTED_H
+#define _LINUX_ATOMIC_INSTRUMENTED_H
+
+#include <linux/build_bug.h>
+#include <linux/compiler.h>
+#include <linux/instrumented.h>
+
+EOF
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic" "int" ${args}
+done
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
+done
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic_long" "long" ${args}
+done
+
+
+for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128" "try_cmpxchg" "try_cmpxchg64" "try_cmpxchg128"; do
+	for order in "" "_acquire" "_release" "_relaxed"; do
+		gen_xchg "${xchg}" "${order}"
+		printf "\n"
+	done
+done
+
+for xchg in "cmpxchg_local" "cmpxchg64_local" "cmpxchg128_local" "sync_cmpxchg" \
+	    "try_cmpxchg_local" "try_cmpxchg64_local" "try_cmpxchg128_local" "sync_try_cmpxchg"; do
+	gen_xchg "${xchg}" ""
+	printf "\n"
+done
+
+cat <<EOF
+
+#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
+EOF

linux-7.2.3/scripts/atomic/gen-atomic-long.sh

@@ -0,0 +1,100 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+ATOMICDIR=$(dirname $0)
+
+. ${ATOMICDIR}/atomic-tbl.sh
+
+#gen_cast(arg, int, atomic)
+gen_cast()
+{
+	local arg="$1"; shift
+	local int="$1"; shift
+	local atomic="$1"; shift
+
+	[ "${arg%%:*}" = "p" ] || return
+
+	printf "($(gen_param_type "${arg}" "${int}" "${atomic}"))"
+}
+
+#gen_args_cast(int, atomic, arg...)
+gen_args_cast()
+{
+	local int="$1"; shift
+	local atomic="$1"; shift
+
+	while [ "$#" -gt 0 ]; do
+		local cast="$(gen_cast "$1" "${int}" "${atomic}")"
+		local arg="$(gen_param_name "$1")"
+		printf "${cast}${arg}"
+		[ "$#" -gt 1 ] && printf ", "
+		shift;
+	done
+}
+
+#gen_proto_order_variant(meta, pfx, name, sfx, order, arg...)
+gen_proto_order_variant()
+{
+	local meta="$1"; shift
+	local pfx="$1"; shift
+	local name="$1"; shift
+	local sfx="$1"; shift
+	local order="$1"; shift
+
+	local atomicname="${pfx}${name}${sfx}${order}"
+
+	local ret="$(gen_ret_type "${meta}" "long")"
+	local params="$(gen_params "long" "atomic_long" "$@")"
+	local argscast_32="$(gen_args_cast "int" "atomic" "$@")"
+	local argscast_64="$(gen_args_cast "s64" "atomic64" "$@")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+
+	gen_kerneldoc "raw_" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "atomic_long" "long" "$@"
+
+cat <<EOF
+static __always_inline ${ret}
+raw_atomic_long_${atomicname}(${params})
+{
+#ifdef CONFIG_64BIT
+	${retstmt}raw_atomic64_${atomicname}(${argscast_64});
+#else
+	${retstmt}raw_atomic_${atomicname}(${argscast_32});
+#endif
+}
+
+EOF
+}
+
+cat << EOF
+// SPDX-License-Identifier: GPL-2.0
+
+// Generated by $0
+// DO NOT MODIFY THIS FILE DIRECTLY
+
+#ifndef _LINUX_ATOMIC_LONG_H
+#define _LINUX_ATOMIC_LONG_H
+
+#include <linux/compiler.h>
+#include <asm/types.h>
+
+#ifdef CONFIG_64BIT
+typedef atomic64_t atomic_long_t;
+#define ATOMIC_LONG_INIT(i)		ATOMIC64_INIT(i)
+#define atomic_long_cond_read_acquire	atomic64_cond_read_acquire
+#define atomic_long_cond_read_relaxed	atomic64_cond_read_relaxed
+#else
+typedef atomic_t atomic_long_t;
+#define ATOMIC_LONG_INIT(i)		ATOMIC_INIT(i)
+#define atomic_long_cond_read_acquire	atomic_cond_read_acquire
+#define atomic_long_cond_read_relaxed	atomic_cond_read_relaxed
+#endif
+
+EOF
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" ${args}
+done
+
+cat <<EOF
+#endif /* _LINUX_ATOMIC_LONG_H */
+EOF

linux-7.2.3/scripts/atomic/gen-atomics.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate atomic headers
+
+ATOMICDIR=$(dirname $0)
+ATOMICTBL=${ATOMICDIR}/atomics.tbl
+LINUXDIR=${ATOMICDIR}/../..
+
+cat <<EOF |
+gen-atomic-instrumented.sh      linux/atomic/atomic-instrumented.h
+gen-atomic-long.sh              linux/atomic/atomic-long.h
+gen-atomic-fallback.sh          linux/atomic/atomic-arch-fallback.h
+gen-rust-atomic-helpers.sh      ../rust/helpers/atomic.c
+EOF
+while read script header args; do
+	/bin/sh ${ATOMICDIR}/${script} ${ATOMICTBL} ${args} > ${LINUXDIR}/include/${header}
+	HASH="$(sha1sum ${LINUXDIR}/include/${header})"
+	HASH="${HASH%% *}"
+	printf "// %s\n" "${HASH}" >> ${LINUXDIR}/include/${header}
+done

linux-7.2.3/scripts/atomic/gen-rust-atomic-helpers.sh

@@ -0,0 +1,62 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+ATOMICDIR=$(dirname $0)
+
+. ${ATOMICDIR}/atomic-tbl.sh
+
+#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
+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"; shift
+	local int="$1"; shift
+
+	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
+
+	local ret="$(gen_ret_type "${meta}" "${int}")"
+	local params="$(gen_params "${int}" "${atomic}" "$@")"
+	local args="$(gen_args "$@")"
+	local retstmt="$(gen_ret_stmt "${meta}")"
+
+cat <<EOF
+__rust_helper ${ret}
+rust_helper_${atomicname}(${params})
+{
+	${retstmt}${atomicname}(${args});
+}
+
+EOF
+}
+
+cat << EOF
+// SPDX-License-Identifier: GPL-2.0
+
+// Generated by $0
+// DO NOT MODIFY THIS FILE DIRECTLY
+
+/*
+ * This file provides helpers for the various atomic functions for Rust.
+ */
+#ifndef _RUST_ATOMIC_API_H
+#define _RUST_ATOMIC_API_H
+
+#include <linux/atomic.h>
+
+EOF
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic" "int" ${args}
+done
+
+grep '^[a-z]' "$1" | while read name meta args; do
+	gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
+done
+
+cat <<EOF
+#endif /* _RUST_ATOMIC_API_H */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/add

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic add with ${desc_order} ordering
+ * @i: ${int} value to add
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v + @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/add_negative

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic add and test if negative with ${desc_order} ordering
+ * @i: ${int} value to add
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v + @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if the resulting value of @v is negative, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/add_unless

@@ -0,0 +1,19 @@
+if [ -z "${pfx}" ]; then
+	desc_return="Return: @true if @v was updated, @false otherwise."
+fi
+
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic add unless value with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ * @a: ${int} value to add
+ * @u: ${int} value to compare with
+ *
+ * If (@v != @u), atomically updates @v to (@v + @a) with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/and

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic bitwise AND with ${desc_order} ordering
+ * @i: ${int} value
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v & @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/andnot

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic bitwise AND NOT with ${desc_order} ordering
+ * @i: ${int} value
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v & ~@i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/cmpxchg

@@ -0,0 +1,15 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic compare and exchange with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ * @old: ${int} value to compare with
+ * @new: ${int} value to assign
+ *
+ * If (@v == @old), atomically updates @v to @new with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: The original value of @v.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/dec

@@ -0,0 +1,12 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic decrement with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v - 1) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/dec_and_test

@@ -0,0 +1,12 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic decrement and test if zero with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v - 1) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if the resulting value of @v is zero, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/dec_if_positive

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic decrement if positive with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * If (@v > 0), atomically updates @v to (@v - 1) with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: The old value of (@v - 1), regardless of whether @v was updated.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/dec_unless_positive

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic decrement unless positive with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * If (@v <= 0), atomically updates @v to (@v - 1) with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if @v was updated, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/inc

@@ -0,0 +1,12 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic increment with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v + 1) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/inc_and_test

@@ -0,0 +1,12 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic increment and test if zero with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v + 1) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if the resulting value of @v is zero, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/inc_not_zero

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic increment unless zero with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * If (@v != 0), atomically updates @v to (@v + 1) with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if @v was updated, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/inc_unless_negative

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic increment unless negative with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * If (@v >= 0), atomically updates @v to (@v + 1) with ${desc_order} ordering.
+ * Otherwise, @v is not modified and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if @v was updated, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/or

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic bitwise OR with ${desc_order} ordering
+ * @i: ${int} value
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v | @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/read

@@ -0,0 +1,12 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic load with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically loads the value of @v with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: The value loaded from @v.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/set

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic set with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ * @i: ${int} value to assign
+ *
+ * Atomically sets @v to @i with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: Nothing.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/sub

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic subtract with ${desc_order} ordering
+ * @i: ${int} value to subtract
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v - @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/sub_and_test

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic subtract and test if zero with ${desc_order} ordering
+ * @i: ${int} value to subtract
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v - @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if the resulting value of @v is zero, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/try_cmpxchg

@@ -0,0 +1,16 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic compare and exchange with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ * @old: pointer to ${int} value to compare with
+ * @new: ${int} value to assign
+ *
+ * If (@v == @old), atomically updates @v to @new with ${desc_order} ordering.
+ * Otherwise, @v is not modified, @old is updated to the current value of @v,
+ * and relaxed ordering is provided.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: @true if the exchange occurred, @false otherwise.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/xchg

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic exchange with ${desc_order} ordering
+ * @v: pointer to ${atomic}_t
+ * @new: ${int} value to assign
+ *
+ * Atomically updates @v to @new with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * Return: The original value of @v.
+ */
+EOF

linux-7.2.3/scripts/atomic/kerneldoc/xor

@@ -0,0 +1,13 @@
+cat <<EOF
+/**
+ * ${class}${atomicname}() - atomic bitwise XOR with ${desc_order} ordering
+ * @i: ${int} value
+ * @v: pointer to ${atomic}_t
+ *
+ * Atomically updates @v to (@v ^ @i) with ${desc_order} ordering.
+ *
+ * ${desc_noinstr}
+ *
+ * ${desc_return}
+ */
+EOF