scripts/atomic/gen-atomic-fallback.sh

File Facts

System

Linux kernel

Corpus path

scripts/atomic/gen-atomic-fallback.sh

Extension

.sh

Size

8766 bytes

Lines

337

Domain

Support Tooling And Documentation

Bucket

scripts

Inferred role

Support Tooling And Documentation: scripts

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.

Dependency Surface

• linux/compiler.h
• asm-generic/atomic64.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#!/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}")"

Annotation

• Immediate include surface: `linux/compiler.h`, `asm-generic/atomic64.h`.
• Atlas domain: Support Tooling And Documentation / scripts.
• Implementation status: atlas-only.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.