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Now that all architectures provide arch_{atomic,atomic64}_*(), we can
build arch_atomic_long_*() atop these, which can be safely used in
noinstr code. The regular atomic_long_*() wrappers are built atop these,
as we do for {atomic,atomic64}_*() atop arch_{atomic,atomic64}_*().
We don't provide arch_* versions of the cond_read*() variants, as we
don't have arch_* versions of the underlying atomic/atomic64 functions
(nor the smp_cond_load*() helpers these are typically based on).
Note that the headers in this patch under include/linux/atomic/ are
generated by the scripts in scripts/atomic/.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210713105253.7615-5-mark.rutland@arm.com
103 lines
2.2 KiB
Bash
Executable File
103 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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ATOMICDIR=$(dirname $0)
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. ${ATOMICDIR}/atomic-tbl.sh
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#gen_cast(arg, int, atomic)
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gen_cast()
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{
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local arg="$1"; shift
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local int="$1"; shift
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local atomic="$1"; shift
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[ "${arg%%:*}" = "p" ] || return
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printf "($(gen_param_type "${arg}" "${int}" "${atomic}"))"
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}
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#gen_args_cast(int, atomic, arg...)
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gen_args_cast()
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{
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local int="$1"; shift
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local atomic="$1"; shift
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while [ "$#" -gt 0 ]; do
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local cast="$(gen_cast "$1" "${int}" "${atomic}")"
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local arg="$(gen_param_name "$1")"
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printf "${cast}${arg}"
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[ "$#" -gt 1 ] && printf ", "
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shift;
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done
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}
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#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
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gen_proto_order_variant()
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{
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local meta="$1"; shift
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local name="$1$2$3$4"; shift; shift; shift; shift
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local atomic="$1"; shift
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local int="$1"; shift
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local ret="$(gen_ret_type "${meta}" "long")"
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local params="$(gen_params "long" "atomic_long" "$@")"
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local argscast="$(gen_args_cast "${int}" "${atomic}" "$@")"
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local retstmt="$(gen_ret_stmt "${meta}")"
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cat <<EOF
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static __always_inline ${ret}
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arch_atomic_long_${name}(${params})
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{
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${retstmt}arch_${atomic}_${name}(${argscast});
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}
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EOF
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}
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cat << EOF
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// SPDX-License-Identifier: GPL-2.0
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// Generated by $0
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// DO NOT MODIFY THIS FILE DIRECTLY
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#ifndef _LINUX_ATOMIC_LONG_H
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#define _LINUX_ATOMIC_LONG_H
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#include <linux/compiler.h>
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#include <asm/types.h>
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#ifdef CONFIG_64BIT
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typedef atomic64_t atomic_long_t;
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#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
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#define atomic_long_cond_read_acquire atomic64_cond_read_acquire
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#define atomic_long_cond_read_relaxed atomic64_cond_read_relaxed
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#else
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typedef atomic_t atomic_long_t;
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#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
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#define atomic_long_cond_read_acquire atomic_cond_read_acquire
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#define atomic_long_cond_read_relaxed atomic_cond_read_relaxed
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#endif
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#ifdef CONFIG_64BIT
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EOF
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
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done
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cat <<EOF
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#else /* CONFIG_64BIT */
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EOF
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic" "int" ${args}
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done
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cat <<EOF
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#endif /* CONFIG_64BIT */
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#endif /* _LINUX_ATOMIC_LONG_H */
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EOF
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