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94dfc73e7c
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
This code was transformed with the help of Coccinelle:
(linux-5.19-rc2$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)
@@
identifier S, member, array;
type T1, T2;
@@
struct S {
...
T1 member;
T2 array[
- 0
];
};
-fstrict-flex-arrays=3 is coming and we need to land these changes
to prevent issues like these in the short future:
../fs/minix/dir.c:337:3: warning: 'strcpy' will always overflow; destination buffer has size 0,
but the source string has length 2 (including NUL byte) [-Wfortify-source]
strcpy(de3->name, ".");
^
Since these are all [0] to [] changes, the risk to UAPI is nearly zero. If
this breaks anything, we can use a union with a new member name.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/78
Build-tested-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/62b675ec.wKX6AOZ6cbE71vtF%25lkp@intel.com/
Acked-by: Dan Williams <dan.j.williams@intel.com> # For ndctl.h
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* cycx_cfm.h Cyclom 2X WAN Link Driver.
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* Definitions for the Cyclom 2X Firmware Module (CFM).
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*
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* Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*
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* Copyright: (c) 1998-2003 Arnaldo Carvalho de Melo
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*
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* Based on sdlasfm.h by Gene Kozin <74604.152@compuserve.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* ============================================================================
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* 1998/08/08 acme Initial version.
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*/
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#ifndef _CYCX_CFM_H
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#define _CYCX_CFM_H
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/* Defines */
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#define CFM_VERSION 2
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#define CFM_SIGNATURE "CFM - Cyclades CYCX Firmware Module"
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/* min/max */
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#define CFM_IMAGE_SIZE 0x20000 /* max size of CYCX code image file */
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#define CFM_DESCR_LEN 256 /* max length of description string */
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#define CFM_MAX_CYCX 1 /* max number of compatible adapters */
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#define CFM_LOAD_BUFSZ 0x400 /* buffer size for reset code (buffer_load) */
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/* Firmware Commands */
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#define GEN_POWER_ON 0x1280
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#define GEN_SET_SEG 0x1401 /* boot segment setting. */
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#define GEN_BOOT_DAT 0x1402 /* boot data. */
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#define GEN_START 0x1403 /* board start. */
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#define GEN_DEFPAR 0x1404 /* buffer length for boot. */
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/* Adapter Types */
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#define CYCX_2X 2
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/* for now only the 2X is supported, no plans to support 8X or 16X */
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#define CYCX_8X 8
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#define CYCX_16X 16
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#define CFID_X25_2X 5200
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/**
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* struct cycx_fw_info - firmware module information.
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* @codeid - firmware ID
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* @version - firmware version number
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* @adapter - compatible adapter types
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* @memsize - minimum memory size
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* @reserved - reserved
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* @startoffs - entry point offset
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* @winoffs - dual-port memory window offset
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* @codeoffs - code load offset
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* @codesize - code size
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* @dataoffs - configuration data load offset
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* @datasize - configuration data size
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*/
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struct cycx_fw_info {
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unsigned short codeid;
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unsigned short version;
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unsigned short adapter[CFM_MAX_CYCX];
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unsigned long memsize;
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unsigned short reserved[2];
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unsigned short startoffs;
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unsigned short winoffs;
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unsigned short codeoffs;
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unsigned long codesize;
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unsigned short dataoffs;
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unsigned long datasize;
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};
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/**
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* struct cycx_firmware - CYCX firmware file structure
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* @signature - CFM file signature
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* @version - file format version
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* @checksum - info + image
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* @reserved - reserved
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* @descr - description string
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* @info - firmware module info
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* @image - code image (variable size)
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*/
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struct cycx_firmware {
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char signature[80];
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unsigned short version;
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unsigned short checksum;
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unsigned short reserved[6];
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char descr[CFM_DESCR_LEN];
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struct cycx_fw_info info;
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unsigned char image[];
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};
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struct cycx_fw_header {
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unsigned long reset_size;
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unsigned long data_size;
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unsigned long code_size;
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};
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#endif /* _CYCX_CFM_H */
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