#!/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="$1"; shift 	local atomicname="arch_${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 "$@")" 	if [ ! -z "${template}" ]; then		printf "#ifndef ${atomicname}\n"		. ${template}		printf "#define ${atomicname} ${atomicname}\n"		printf "#endif\n\n"	fi} #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_basic_fallbacks(basename)gen_basic_fallbacks(){	local basename="$1"; shiftcat << EOF#define ${basename}_acquire ${basename}#define ${basename}_release ${basename}#define ${basename}_relaxed ${basename}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(){	local meta="$1"; shift	local pfx="$1"; shift	local name="$1"; shift	local sfx="$1"; shift	local atomic="$1" 	local basename="arch_${atomic}_${pfx}${name}${sfx}" 	local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")" 	# If we don't have relaxed atomics, then we don't bother with ordering fallbacks	# read_acquire and set_release need to be templated, though	if ! meta_has_relaxed "${meta}"; then		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" 		if meta_has_acquire "${meta}"; then			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"		fi 		if meta_has_release "${meta}"; then			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"		fi 		return	fi 	printf "#ifndef ${basename}_relaxed\n" 	if [ ! -z "${template}" ]; then		printf "#ifdef ${basename}\n"	fi 	gen_basic_fallbacks "${basename}" 	if [ ! -z "${template}" ]; then		printf "#endif /* ${basename} */\n\n"		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"	fi 	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}" "" "$@" 	printf "#endif /* ${basename}_relaxed */\n\n"} gen_order_fallbacks(){	local xchg="$1"; shift cat <<EOF #ifndef ${xchg}_acquire#define ${xchg}_acquire(...) \\	__atomic_op_acquire(${xchg}, __VA_ARGS__)#endif #ifndef ${xchg}_release#define ${xchg}_release(...) \\	__atomic_op_release(${xchg}, __VA_ARGS__)#endif #ifndef ${xchg}#define ${xchg}(...) \\	__atomic_op_fence(${xchg}, __VA_ARGS__)#endif EOF} gen_xchg_fallbacks(){	local xchg="$1"; shift	printf "#ifndef ${xchg}_relaxed\n" 	gen_basic_fallbacks ${xchg} 	printf "#else /* ${xchg}_relaxed */\n" 	gen_order_fallbacks ${xchg} 	printf "#endif /* ${xchg}_relaxed */\n\n"} gen_try_cmpxchg_fallback(){	local order="$1"; shift; cat <<EOF#ifndef arch_try_cmpxchg${order}#define arch_try_cmpxchg${order}(_ptr, _oldp, _new) \\({ \\	typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \\	___r = arch_cmpxchg${order}((_ptr), ___o, (_new)); \\	if (unlikely(___r != ___o)) \\		*___op = ___r; \\	likely(___r == ___o); \\})#endif /* arch_try_cmpxchg${order} */ EOF} gen_try_cmpxchg_fallbacks(){	printf "#ifndef arch_try_cmpxchg_relaxed\n"	printf "#ifdef arch_try_cmpxchg\n" 	gen_basic_fallbacks "arch_try_cmpxchg" 	printf "#endif /* arch_try_cmpxchg */\n\n" 	for order in "" "_acquire" "_release" "_relaxed"; do		gen_try_cmpxchg_fallback "${order}"	done 	printf "#else /* arch_try_cmpxchg_relaxed */\n" 	gen_order_fallbacks "arch_try_cmpxchg" 	printf "#endif /* arch_try_cmpxchg_relaxed */\n\n"} cat << EOF// SPDX-License-Identifier: GPL-2.0 // Generated by $0// DO NOT MODIFY THIS FILE DIRECTLY #ifndef _LINUX_ATOMIC_FALLBACK_H#define _LINUX_ATOMIC_FALLBACK_H #include <linux/compiler.h> EOF for xchg in "arch_xchg" "arch_cmpxchg" "arch_cmpxchg64"; do	gen_xchg_fallbacks "${xchg}"done gen_try_cmpxchg_fallbacks 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