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5224f79096
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:
(next-20220214$ 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
];
};
UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.
[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
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
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* include/asm-xtensa/bootparam.h
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*
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* Definition of the Linux/Xtensa boot parameter structure
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*
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* (Concept borrowed from the 68K port)
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*/
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#ifndef _XTENSA_BOOTPARAM_H
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#define _XTENSA_BOOTPARAM_H
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#define BP_VERSION 0x0001
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#define BP_TAG_COMMAND_LINE 0x1001 /* command line (0-terminated string)*/
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#define BP_TAG_INITRD 0x1002 /* ramdisk addr and size (bp_meminfo) */
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#define BP_TAG_MEMORY 0x1003 /* memory addr and size (bp_meminfo) */
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#define BP_TAG_SERIAL_BAUDRATE 0x1004 /* baud rate of current console. */
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#define BP_TAG_SERIAL_PORT 0x1005 /* serial device of current console */
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#define BP_TAG_FDT 0x1006 /* flat device tree addr */
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#define BP_TAG_FIRST 0x7B0B /* first tag with a version number */
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#define BP_TAG_LAST 0x7E0B /* last tag */
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#ifndef __ASSEMBLY__
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/* All records are aligned to 4 bytes */
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typedef struct bp_tag {
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unsigned short id; /* tag id */
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unsigned short size; /* size of this record excluding the structure*/
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unsigned long data[]; /* data */
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} bp_tag_t;
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struct bp_meminfo {
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unsigned long type;
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unsigned long start;
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unsigned long end;
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};
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#define MEMORY_TYPE_CONVENTIONAL 0x1000
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#define MEMORY_TYPE_NONE 0x2000
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#endif
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#endif
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