commonlib: Add commonlib/bsd

This patch creates a new commonlib/bsd subdirectory with a similar
purpose to the existing commonlib, with the difference that all files
under this subdirectory shall be licensed under the BSD-3-Clause license
(or compatible permissive license). The goal is to allow more code to be
shared with libpayload in the future.

Initially, I'm going to move a few files there that have already been
BSD-licensed in the existing commonlib. I am also exracting most
contents of the often-needed <commonlib/helpers.h> as long as they have
either been written by me (and are hereby relicensed) or have an
existing equivalent in BSD-licensed libpayload code. I am also
relicensing <commonlib/compression.h> (written by me) and
<commonlib/compiler.h> (same stuff exists in libpayload).

Finally, I am extracting the cb_err error code definitions from
<types.h> into a new BSD-licensed header so that future commonlib/bsd
code can build upon a common set of error values. I am making the
assumption here that the enum constants and the half-sentence fragments
of documentation next to them by themselves do not meet the threshold of
copyrightability.

Change-Id: I316cea70930f131e8e93d4218542ddb5ae4b63a2
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38420
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

6 files changed, 5 insertions, 490 deletions

diff --git a/src/commonlib/include/commonlib/cbfs.h b/src/commonlib/include/commonlib/cbfs.h
index b0aa9d3ddb..470173023e 100644
--- a/src/commonlib/include/commonlib/cbfs.h
+++ b/src/commonlib/include/commonlib/cbfs.h
@@ -14,7 +14,7 @@
 #ifndef _COMMONLIB_CBFS_H_
 #define _COMMONLIB_CBFS_H_
 
-#include <commonlib/cbfs_serialized.h>
+#include <commonlib/bsd/cbfs_serialized.h>
 #include <commonlib/region.h>
 #include <vb2_api.h>
 
diff --git a/src/commonlib/include/commonlib/cbfs_serialized.h b/src/commonlib/include/commonlib/cbfs_serialized.h
deleted file mode 100644
index d3a18c600a..0000000000
--- a/src/commonlib/include/commonlib/cbfs_serialized.h
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
- * Copyright (C) 2012 Google, Inc.
- * Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
- *
- * This file is dual-licensed. You can choose between:
- *   - The GNU GPL, version 2, as published by the Free Software Foundation
- *   - The revised BSD license (without advertising clause)
- *
- * ---------------------------------------------------------------------------
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * ---------------------------------------------------------------------------
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ---------------------------------------------------------------------------
- */
-
-#ifndef _CBFS_SERIALIZED_H_
-#define _CBFS_SERIALIZED_H_
-
-#include <stdint.h>
-
-/** These are standard values for the known compression
-    algorithms that coreboot knows about for stages and
-    payloads.  Of course, other CBFS users can use whatever
-    values they want, as long as they understand them. */
-
-#define CBFS_COMPRESS_NONE  0
-#define CBFS_COMPRESS_LZMA  1
-#define CBFS_COMPRESS_LZ4   2
-
-/** These are standard component types for well known
-    components (i.e - those that coreboot needs to consume.
-    Users are welcome to use any other value for their
-    components */
-
-#define CBFS_TYPE_DELETED    0x00000000
-#define CBFS_TYPE_DELETED2   0xffffffff
-#define CBFS_TYPE_STAGE      0x10
-#define CBFS_TYPE_SELF       0x20
-#define CBFS_TYPE_FIT        0x21
-#define CBFS_TYPE_OPTIONROM  0x30
-#define CBFS_TYPE_BOOTSPLASH 0x40
-#define CBFS_TYPE_RAW        0x50
-#define CBFS_TYPE_VSA        0x51
-#define CBFS_TYPE_MBI        0x52
-#define CBFS_TYPE_MICROCODE  0x53
-#define CBFS_TYPE_FSP        0x60
-#define CBFS_TYPE_MRC        0x61
-#define CBFS_TYPE_MMA        0x62
-#define CBFS_TYPE_EFI        0x63
-#define CBFS_TYPE_STRUCT     0x70
-#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
-#define CBFS_TYPE_SPD          0xab
-#define CBFS_TYPE_MRC_CACHE    0xac
-#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
-
-#define CBFS_HEADER_MAGIC  0x4F524243
-#define CBFS_HEADER_VERSION1 0x31313131
-#define CBFS_HEADER_VERSION2 0x31313132
-#define CBFS_HEADER_VERSION  CBFS_HEADER_VERSION2
-
-/* this is the master cbfs header - it must be located somewhere available
- * to bootblock (to load romstage). The last 4 bytes in the image contain its
- * relative offset from the end of the image (as a 32-bit signed integer). */
-
-struct cbfs_header {
-	uint32_t magic;
-	uint32_t version;
-	uint32_t romsize;
-	uint32_t bootblocksize;
-	uint32_t align; /* fixed to 64 bytes */
-	uint32_t offset;
-	uint32_t architecture;
-	uint32_t pad[1];
-} __packed;
-
-/* this used to be flexible, but wasn't ever set to something different. */
-#define CBFS_ALIGNMENT 64
-
-/* "Unknown" refers to CBFS headers version 1,
- * before the architecture was defined (i.e., x86 only).
- */
-#define CBFS_ARCHITECTURE_UNKNOWN  0xFFFFFFFF
-#define CBFS_ARCHITECTURE_X86      0x00000001
-#define CBFS_ARCHITECTURE_ARM      0x00000010
-
-/** This is a component header - every entry in the CBFS
-    will have this header.
-
-    This is how the component is arranged in the ROM:
-
-    --------------   <- 0
-    component header
-    --------------   <- sizeof(struct component)
-    component name
-    --------------   <- offset
-    data
-    ...
-    --------------   <- offset + len
-*/
-
-#define CBFS_FILE_MAGIC "LARCHIVE"
-
-struct cbfs_file {
-	char magic[8];
-	uint32_t len;
-	uint32_t type;
-	uint32_t attributes_offset;
-	uint32_t offset;
-} __packed;
-
-/* The common fields of extended cbfs file attributes.
-   Attributes are expected to start with tag/len, then append their
-   specific fields. */
-struct cbfs_file_attribute {
-	uint32_t tag;
-	/* len covers the whole structure, incl. tag and len */
-	uint32_t len;
-	uint8_t data[0];
-} __packed;
-
-/* Depending on how the header was initialized, it may be backed with 0x00 or
- * 0xff. Support both. */
-#define CBFS_FILE_ATTR_TAG_UNUSED 0
-#define CBFS_FILE_ATTR_TAG_UNUSED2 0xffffffff
-#define CBFS_FILE_ATTR_TAG_COMPRESSION 0x42435a4c
-#define CBFS_FILE_ATTR_TAG_HASH 0x68736148
-#define CBFS_FILE_ATTR_TAG_POSITION 0x42435350  /* PSCB */
-#define CBFS_FILE_ATTR_TAG_ALIGNMENT 0x42434c41 /* ALCB */
-#define CBFS_FILE_ATTR_TAG_IBB 0x32494242 /* Initial BootBlock */
-
-struct cbfs_file_attr_compression {
-	uint32_t tag;
-	uint32_t len;
-	/* whole file compression format. 0 if no compression. */
-	uint32_t compression;
-	uint32_t decompressed_size;
-} __packed;
-
-struct cbfs_file_attr_hash {
-	uint32_t tag;
-	uint32_t len;
-	uint32_t hash_type;
-	/* hash_data is len - sizeof(struct) bytes */
-	uint8_t  hash_data[];
-} __packed;
-
-struct cbfs_file_attr_position {
-	uint32_t tag;
-	uint32_t len;
-	uint32_t position;
-} __packed;
-
-struct cbfs_file_attr_align {
-	uint32_t tag;
-	uint32_t len;
-	uint32_t alignment;
-} __packed;
-
-
-/*** Component sub-headers ***/
-
-/* Following are component sub-headers for the "standard"
-   component types */
-
-/** This is the sub-header for stage components.  Stages are
-    loaded by coreboot during the normal boot process */
-
-struct cbfs_stage {
-	uint32_t compression;  /** Compression type */
-	uint64_t entry;  /** entry point */
-	uint64_t load;   /** Where to load in memory */
-	uint32_t len;          /** length of data to load */
-	uint32_t memlen;	   /** total length of object in memory */
-} __packed;
-
-/** this is the sub-header for payload components.  Payloads
-    are loaded by coreboot at the end of the boot process */
-
-struct cbfs_payload_segment {
-	uint32_t type;
-	uint32_t compression;
-	uint32_t offset;
-	uint64_t load_addr;
-	uint32_t len;
-	uint32_t mem_len;
-} __packed;
-
-struct cbfs_payload {
-	struct cbfs_payload_segment segments;
-};
-
-#define PAYLOAD_SEGMENT_CODE   0x434F4445
-#define PAYLOAD_SEGMENT_DATA   0x44415441
-#define PAYLOAD_SEGMENT_BSS    0x42535320
-#define PAYLOAD_SEGMENT_PARAMS 0x50415241
-#define PAYLOAD_SEGMENT_ENTRY  0x454E5452
-
-struct cbfs_optionrom {
-	uint32_t compression;
-	uint32_t len;
-} __packed;
-
-#endif /* _CBFS_SERIALIZED_H_ */
diff --git a/src/commonlib/include/commonlib/compiler.h b/src/commonlib/include/commonlib/compiler.h
deleted file mode 100644
index 972a2293a2..0000000000
--- a/src/commonlib/include/commonlib/compiler.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef _COMMONLIB_COMPILER_H_
-#define _COMMONLIB_COMPILER_H_
-
-#ifndef __packed
-#if defined(__WIN32) || defined(__WIN64)
-#define __packed __attribute__((gcc_struct, packed))
-#else
-#define __packed __attribute__((packed))
-#endif
-#endif
-
-#ifndef __aligned
-#define __aligned(x) __attribute__((aligned(x)))
-#endif
-
-#ifndef __always_unused
-#define __always_unused __attribute__((unused))
-#endif
-
-#ifndef __must_check
-#define __must_check __attribute__((warn_unused_result))
-#endif
-
-#ifndef __weak
-#define __weak __attribute__((weak))
-#endif
-
-#ifndef __noreturn
-#define __noreturn __attribute__((noreturn))
-#endif
-
-#ifndef __always_inline
-#define __always_inline inline __attribute__((always_inline))
-#endif
-
-/* This evaluates to the type of the first expression, unless that is constant
-   in which case it evalutates to the type of the second. This is useful when
-   assigning macro parameters to temporary variables, because that would
-   normally circumvent the special loosened type promotion rules for integer
-   literals. By using this macro, the promotion can happen at the time the
-   literal is assigned to the temporary variable. If the literal doesn't fit in
-   the chosen type, -Werror=overflow will catch it, so this should be safe. */
-#define __TYPEOF_UNLESS_CONST(expr, fallback_expr) __typeof__( \
-	__builtin_choose_expr(__builtin_constant_p(expr), fallback_expr, expr))
-
-/* This creates a unique local variable name for use in macros. */
-#define __TMPNAME_3(i) __tmpname_##i
-#define __TMPNAME_2(i) __TMPNAME_3(i)
-#define __TMPNAME __TMPNAME_2(__COUNTER__)
-
-#endif
diff --git a/src/commonlib/include/commonlib/compression.h b/src/commonlib/include/commonlib/compression.h
deleted file mode 100644
index 3988ef8ade..0000000000
--- a/src/commonlib/include/commonlib/compression.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef _COMMONLIB_COMPRESSION_H_
-#define _COMMONLIB_COMPRESSION_H_
-
-#include <stddef.h>
-
-/* Decompresses an LZ4F image (multiple LZ4 blocks with frame header) from src
- * to dst, ensuring that it doesn't read more than srcn bytes and doesn't write
- * more than dstn. Buffer sizes must stay below 2GB. Can decompress files loaded
- * to the end of a buffer in-place, as long as buffer is larger than the final
- * output size. (Usually just a few bytes, but may be up to (8 + dstn/255) in
- * worst case. Will reliably return an error if buffer was too small.)
- * Returns amount of decompressed bytes, or 0 on error.
- */
-size_t ulz4fn(const void *src, size_t srcn, void *dst, size_t dstn);
-
-/* Same as ulz4fn() but does not perform any bounds checks. */
-size_t ulz4f(const void *src, void *dst);
-
-#endif	/* _COMMONLIB_COMPRESSION_H_ */
diff --git a/src/commonlib/include/commonlib/fmap_serialized.h b/src/commonlib/include/commonlib/fmap_serialized.h
deleted file mode 100644
index 53a09af7a8..0000000000
--- a/src/commonlib/include/commonlib/fmap_serialized.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright 2010, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *    * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *    * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *    * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- */
-
-#ifndef FLASHMAP_SERIALIZED_H__
-#define FLASHMAP_SERIALIZED_H__
-
-#include <stdint.h>
-
-#define FMAP_SIGNATURE		"__FMAP__"
-#define FMAP_VER_MAJOR		1	/* this header's FMAP minor version */
-#define FMAP_VER_MINOR		1	/* this header's FMAP minor version */
-#define FMAP_STRLEN		32	/* maximum length for strings, */
-					/* including null-terminator */
-
-enum fmap_flags {
-	FMAP_AREA_STATIC	= 1 << 0,
-	FMAP_AREA_COMPRESSED	= 1 << 1,
-	FMAP_AREA_RO		= 1 << 2,
-	FMAP_AREA_PRESERVE	= 1 << 3,
-};
-
-/* Mapping of volatile and static regions in firmware binary */
-struct fmap_area {
-	uint32_t offset;                /* offset relative to base */
-	uint32_t size;                  /* size in bytes */
-	uint8_t  name[FMAP_STRLEN];     /* descriptive name */
-	uint16_t flags;                 /* flags for this area */
-}  __packed;
-
-struct fmap {
-	uint8_t  signature[8];		/* "__FMAP__" (0x5F5F464D41505F5F) */
-	uint8_t  ver_major;		/* major version */
-	uint8_t  ver_minor;		/* minor version */
-	uint64_t base;			/* address of the firmware binary */
-	uint32_t size;			/* size of firmware binary in bytes */
-	uint8_t  name[FMAP_STRLEN];	/* name of this firmware binary */
-	uint16_t nareas;		/* number of areas described by
-					   fmap_areas[] below */
-	struct fmap_area areas[];
-} __packed;
-
-#endif	/* FLASHMAP_SERIALIZED_H__ */
diff --git a/src/commonlib/include/commonlib/helpers.h b/src/commonlib/include/commonlib/helpers.h
index f07b6c22f1..a5fe87d42e 100644
--- a/src/commonlib/include/commonlib/helpers.h
+++ b/src/commonlib/include/commonlib/helpers.h
@@ -13,71 +13,12 @@
 
 #ifndef COMMONLIB_HELPERS_H
 #define COMMONLIB_HELPERS_H
-/* This file is for helpers for both coreboot firmware and its utilities. */
 
-#ifndef __ASSEMBLER__
-#include <commonlib/compiler.h>
-#include <stddef.h>
-#endif
-
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
-#endif
-
-#define ALIGN(x, a)             __ALIGN_MASK(x, (__typeof__(x))(a)-1UL)
-#define __ALIGN_MASK(x, mask)   (((x)+(mask))&~(mask))
-#define ALIGN_UP(x, a)          ALIGN((x), (a))
-#define ALIGN_DOWN(x, a)        ((x) & ~((__typeof__(x))(a)-1UL))
-#define IS_ALIGNED(x, a)        (((x) & ((__typeof__(x))(a)-1UL)) == 0)
-
-/* Double-evaluation unsafe min/max, for bitfields and outside of functions */
-#define __CMP_UNSAFE(a, b, op) ((a) op (b) ? (a) : (b))
-#define MIN_UNSAFE(a, b) __CMP_UNSAFE(a, b, <)
-#define MAX_UNSAFE(a, b) __CMP_UNSAFE(a, b, >)
-
-#define __CMP_SAFE(a, b, op, var_a, var_b) ({ \
-	__TYPEOF_UNLESS_CONST(a, b) var_a = (a); \
-	__TYPEOF_UNLESS_CONST(b, a) var_b = (b); \
-	var_a op var_b ? var_a : var_b; \
-})
+/* This file is for helpers for both coreboot firmware and its utilities. Most
+   of this has moved into <commonlib/bsd/helpers.h> now, this wrapper is just
+   for the stuff that nobody bothered to confirm BSD-licensability of yet. */
 
-
-#define __CMP(a, b, op) __builtin_choose_expr( \
-	__builtin_constant_p(a) && __builtin_constant_p(b), \
-	__CMP_UNSAFE(a, b, op), __CMP_SAFE(a, b, op, __TMPNAME, __TMPNAME))
-
-#ifndef MIN
-#define MIN(a, b) __CMP(a, b, <)
-#endif
-#ifndef MAX
-#define MAX(a, b) __CMP(a, b, >)
-#endif
-
-#ifndef ABS
-#define ABS(a) ({ \
-	__typeof__(a) _abs_local_a = (a); \
-	(_abs_local_a < 0) ? (-_abs_local_a) : _abs_local_a; \
-})
-#endif
-
-#define IS_POWER_OF_2(x) ({ \
-	__typeof__(x) _power_local_x = (x); \
-	(_power_local_x & (_power_local_x - 1)) == 0; \
-})
-
-#define DIV_ROUND_UP(x, y) ({ \
-	__typeof__(x) _div_local_x = (x); \
-	__typeof__(y) _div_local_y = (y); \
-	(_div_local_x + _div_local_y - 1) / _div_local_y; \
-})
-
-#define SWAP(a, b) do { \
-	__typeof__(&(a)) _swap_local_a = &(a); \
-	__typeof__(&(b)) _swap_local_b = &(b); \
-	__typeof__(a) _swap_local_tmp = *_swap_local_a; \
-	*_swap_local_a = *_swap_local_b; \
-	*_swap_local_b = _swap_local_tmp; \
-} while (0)
+#include <commonlib/bsd/helpers.h>
 
 /*
  * Divide positive or negative dividend by positive divisor and round
@@ -93,25 +34,6 @@
 		((_div_local_x - (_div_local_d / 2)) / _div_local_d);	\
 })
 
-/* Standard units. */
-#define KiB (1<<10)
-#define MiB (1<<20)
-#define GiB (1<<30)
-/* Could we ever run into this one? I hope we get this much memory! */
-#define TiB (1<<40)
-
-#define KHz (1000)
-#define MHz (1000 * KHz)
-#define GHz (1000 * MHz)
-
-#ifndef offsetof
-#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
-#endif
-
-#define check_member(structure, member, offset) _Static_assert( \
-	offsetof(struct structure, member) == offset, \
-	"`struct " #structure "` offset for `" #member "` is not " #offset)
-
 /**
  * container_of - cast a member of a structure out to the containing structure
  * @param ptr:    the pointer to the member.
@@ -123,9 +45,6 @@
 	const __typeof__(((type *)0)->member) *__mptr = (ptr);	\
 	(type *)((char *)__mptr - offsetof(type, member)); })
 
-/* Calculate size of structure member. */
-#define member_size(type, member)	(sizeof(((type *)0)->member))
-
 #ifndef __unused
 #define __unused __attribute__((unused))
 #endif