volume_id: replace __packed__ by PACKED macro

30 files changed, 72 insertions, 68 deletions

diff --git a/extras/volume_id/libvolume_id/cramfs.c b/extras/volume_id/libvolume_id/cramfs.c
index bf79407d..e099c214 100644
--- a/extras/volume_id/libvolume_id/cramfs.c
+++ b/extras/volume_id/libvolume_id/cramfs.c
@@ -38,9 +38,9 @@ struct cramfs_super {
 		uint32_t	edition;
 		uint32_t	blocks;
 		uint32_t	files;
-	} __attribute__((__packed__)) info;
+	} PACKED info;
 	uint8_t		name[16];
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_cramfs(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/ext.c b/extras/volume_id/libvolume_id/ext.c
index d1f62dfb..26ac98bc 100644
--- a/extras/volume_id/libvolume_id/ext.c
+++ b/extras/volume_id/libvolume_id/ext.c
@@ -61,7 +61,7 @@ struct ext2_super_block {
 	uint32_t	s_feature_ro_compat;
 	uint8_t		s_uuid[16];
 	uint8_t		s_volume_name[16];
-} __attribute__((__packed__));
+} PACKED;
 
 #define EXT_SUPER_MAGIC				0xEF53
 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x00000004
diff --git a/extras/volume_id/libvolume_id/fat.c b/extras/volume_id/libvolume_id/fat.c
index cea5b8cf..a72ec19f 100644
--- a/extras/volume_id/libvolume_id/fat.c
+++ b/extras/volume_id/libvolume_id/fat.c
@@ -58,7 +58,7 @@ struct vfat_super_block {
 			uint8_t		magic[8];
 			uint8_t		dummy2[192];
 			uint8_t		pmagic[2];
-		} __attribute__((__packed__)) fat;
+		} PACKED fat;
 		struct fat32_super_block {
 			uint32_t	fat32_length;
 			uint16_t	flags;
@@ -73,9 +73,9 @@ struct vfat_super_block {
 			uint8_t		magic[8];
 			uint8_t		dummy2[164];
 			uint8_t		pmagic[2];
-		} __attribute__((__packed__)) fat32;
-	} __attribute__((__packed__)) type;
-} __attribute__((__packed__));
+		} PACKED fat32;
+	} PACKED type;
+} PACKED;
 
 struct vfat_dir_entry {
 	uint8_t		name[11];
@@ -89,7 +89,7 @@ struct vfat_dir_entry {
 	uint16_t	date_write;
 	uint16_t	cluster_low;
 	uint32_t	size;
-} __attribute__((__packed__));
+} PACKED;
 
 static uint8_t *get_attr_volume_id(struct vfat_dir_entry *dir, unsigned int count)
 {
diff --git a/extras/volume_id/libvolume_id/hfs.c b/extras/volume_id/libvolume_id/hfs.c
index 27a8ac99..09194d5b 100644
--- a/extras/volume_id/libvolume_id/hfs.c
+++ b/extras/volume_id/libvolume_id/hfs.c
@@ -35,7 +35,7 @@ struct hfs_finder_info{
 	uint32_t	reserved;
 	uint32_t	osx_folder;
 	uint8_t		id[8];
-} __attribute__((__packed__));
+} PACKED;
 
 struct hfs_mdb {
 	uint8_t		signature[2];
@@ -65,7 +65,7 @@ struct hfs_mdb {
 	uint8_t		embed_sig[2];
 	uint16_t	embed_startblock;
 	uint16_t	embed_blockcount;
-} __attribute__((__packed__)) *hfs;
+} PACKED *hfs;
 
 struct hfsplus_bnode_descriptor {
 	uint32_t	next;
@@ -74,7 +74,7 @@ struct hfsplus_bnode_descriptor {
 	uint8_t		height;
 	uint16_t	num_recs;
 	uint16_t	reserved;
-} __attribute__((__packed__));
+} PACKED;
 
 struct hfsplus_bheader_record {
 	uint16_t	depth;
@@ -83,19 +83,19 @@ struct hfsplus_bheader_record {
 	uint32_t	leaf_head;
 	uint32_t	leaf_tail;
 	uint16_t	node_size;
-} __attribute__((__packed__));
+} PACKED;
 
 struct hfsplus_catalog_key {
 	uint16_t	key_len;
 	uint32_t	parent_id;
 	uint16_t	unicode_len;
 	uint8_t		unicode[255 * 2];
-} __attribute__((__packed__));
+} PACKED;
 
 struct hfsplus_extent {
 	uint32_t	start_block;
 	uint32_t	block_count;
-} __attribute__((__packed__));
+} PACKED;
 
 #define HFSPLUS_EXTENT_COUNT		8
 struct hfsplus_fork {
@@ -103,7 +103,7 @@ struct hfsplus_fork {
 	uint32_t	clump_size;
 	uint32_t	total_blocks;
 	struct hfsplus_extent extents[HFSPLUS_EXTENT_COUNT];
-} __attribute__((__packed__));
+} PACKED;
 
 struct hfsplus_vol_header {
 	uint8_t		signature[2];
@@ -132,7 +132,7 @@ struct hfsplus_vol_header {
 	struct hfsplus_fork cat_file;
 	struct hfsplus_fork attr_file;
 	struct hfsplus_fork start_file;
-} __attribute__((__packed__)) *hfsplus;
+} PACKED *hfsplus;
 
 #define HFS_SUPERBLOCK_OFFSET		0x400
 #define HFS_NODE_LEAF			0xff
diff --git a/extras/volume_id/libvolume_id/highpoint.c b/extras/volume_id/libvolume_id/highpoint.c
index 721b7ab2..78a4ad82 100644
--- a/extras/volume_id/libvolume_id/highpoint.c
+++ b/extras/volume_id/libvolume_id/highpoint.c
@@ -30,11 +30,11 @@
 struct hpt37x_meta {
 	uint8_t		filler1[32];
 	uint32_t	magic;
-} __attribute__((packed));
+} PACKED;
 
 struct hpt45x_meta {
 	uint32_t	magic;
-} __attribute__((packed));
+} PACKED;
 
 #define HPT37X_CONFIG_OFF		0x1200
 #define HPT37X_MAGIC_OK			0x5a7816f0
diff --git a/extras/volume_id/libvolume_id/hpfs.c b/extras/volume_id/libvolume_id/hpfs.c
index 52cb47be..452df012 100644
--- a/extras/volume_id/libvolume_id/hpfs.c
+++ b/extras/volume_id/libvolume_id/hpfs.c
@@ -31,7 +31,7 @@ struct hpfs_super
 {
 	uint8_t		magic[4];
 	uint8_t		version;
-} __attribute__((__packed__));
+} PACKED;
 
 #define HPFS_SUPERBLOCK_OFFSET			0x2000
 
diff --git a/extras/volume_id/libvolume_id/iso9660.c b/extras/volume_id/libvolume_id/iso9660.c
index b6654cec..2e28af8d 100644
--- a/extras/volume_id/libvolume_id/iso9660.c
+++ b/extras/volume_id/libvolume_id/iso9660.c
@@ -45,14 +45,14 @@ struct iso_volume_descriptor {
 	uint8_t		unused[8];
 	uint8_t		space_size[8];
 	uint8_t		escape_sequences[8];
-} __attribute__((__packed__));
+} PACKED;
 
 struct high_sierra_volume_descriptor {
 	uint8_t		foo[8];
 	uint8_t		type;
 	uint8_t		id[4];
 	uint8_t		version;
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_iso9660(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/isw_raid.c b/extras/volume_id/libvolume_id/isw_raid.c
index 1f49959f..72b2b85b 100644
--- a/extras/volume_id/libvolume_id/isw_raid.c
+++ b/extras/volume_id/libvolume_id/isw_raid.c
@@ -33,7 +33,7 @@ struct isw_meta {
 	uint32_t	mpb_size;
 	uint32_t	family_num;
 	uint32_t	generation_num;
-} __attribute__((packed));
+} PACKED;
 
 #define ISW_SIGNATURE		"Intel Raid ISM Cfg Sig. "
 
diff --git a/extras/volume_id/libvolume_id/jfs.c b/extras/volume_id/libvolume_id/jfs.c
index b6ae9624..78b61fb3 100644
--- a/extras/volume_id/libvolume_id/jfs.c
+++ b/extras/volume_id/libvolume_id/jfs.c
@@ -38,7 +38,7 @@ struct jfs_super_block {
 	uint8_t		uuid[16];
 	uint8_t		label[16];
 	uint8_t		loguuid[16];
-} __attribute__((__packed__));
+} PACKED;
 
 #define JFS_SUPERBLOCK_OFFSET			0x8000
 
diff --git a/extras/volume_id/libvolume_id/linux_raid.c b/extras/volume_id/libvolume_id/linux_raid.c
index d90510a8..2285e87b 100644
--- a/extras/volume_id/libvolume_id/linux_raid.c
+++ b/extras/volume_id/libvolume_id/linux_raid.c
@@ -44,7 +44,7 @@ struct mdp_super_block {
 	uint32_t	set_uuid1;
 	uint32_t	set_uuid2;
 	uint32_t	set_uuid3;
-} __attribute__((packed)) *mdp;
+} PACKED *mdp;
 
 #define MD_RESERVED_BYTES		0x10000
 #define MD_MAGIC			0xa92b4efc
diff --git a/extras/volume_id/libvolume_id/linux_swap.c b/extras/volume_id/libvolume_id/linux_swap.c
index 18928b83..b4828347 100644
--- a/extras/volume_id/libvolume_id/linux_swap.c
+++ b/extras/volume_id/libvolume_id/linux_swap.c
@@ -34,7 +34,7 @@ struct swap_header_v1_2 {
 	uint32_t	nr_badpages;
 	uint8_t		uuid[16];
 	uint8_t		volume_name[16];
-} __attribute__((__packed__)) *sw;
+} PACKED *sw;
 
 #define LARGEST_PAGESIZE			0x4000
 
diff --git a/extras/volume_id/libvolume_id/lsi_raid.c b/extras/volume_id/libvolume_id/lsi_raid.c
index 2720de76..efa79257 100644
--- a/extras/volume_id/libvolume_id/lsi_raid.c
+++ b/extras/volume_id/libvolume_id/lsi_raid.c
@@ -29,7 +29,7 @@
 
 struct lsi_meta {
 	uint8_t		sig[6];
-} __attribute__((packed));
+} PACKED;
 
 #define LSI_SIGNATURE		"$XIDE$"
 
diff --git a/extras/volume_id/libvolume_id/lvm.c b/extras/volume_id/libvolume_id/lvm.c
index 65098625..074660b1 100644
--- a/extras/volume_id/libvolume_id/lvm.c
+++ b/extras/volume_id/libvolume_id/lvm.c
@@ -29,7 +29,7 @@
 
 struct lvm1_super_block {
 	uint8_t	id[2];
-} __attribute__((packed));
+} PACKED;
 
 struct lvm2_super_block {
 	uint8_t		id[8];
@@ -37,7 +37,7 @@ struct lvm2_super_block {
 	uint32_t	crc_xl;
 	uint32_t	offset_xl;
 	uint8_t		type[8];
-} __attribute__((packed));
+} PACKED;
 
 #define LVM1_SB_OFF			0x400
 #define LVM1_MAGIC			"HM"
diff --git a/extras/volume_id/libvolume_id/mac.c b/extras/volume_id/libvolume_id/mac.c
index 53f0761c..78ef9fc8 100644
--- a/extras/volume_id/libvolume_id/mac.c
+++ b/extras/volume_id/libvolume_id/mac.c
@@ -31,7 +31,7 @@ struct mac_driver_desc {
 	uint8_t		signature[2];
 	uint16_t	block_size;
 	uint32_t	block_count;
-} __attribute__((__packed__));
+} PACKED;
 
 struct mac_partition {
 	uint8_t		signature[2];
@@ -41,7 +41,7 @@ struct mac_partition {
 	uint32_t	block_count;
 	uint8_t		name[32];
 	uint8_t		type[32];
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/minix.c b/extras/volume_id/libvolume_id/minix.c
index ca57745f..fefba8e7 100644
--- a/extras/volume_id/libvolume_id/minix.c
+++ b/extras/volume_id/libvolume_id/minix.c
@@ -39,7 +39,7 @@ struct minix_super_block
 	uint16_t	s_magic;
 	uint16_t	s_state;
 	uint32_t	s_zones;
-} __attribute__((__packed__));
+} PACKED;
 
 #define MINIX_SUPERBLOCK_OFFSET			0x400
 
diff --git a/extras/volume_id/libvolume_id/msdos.c b/extras/volume_id/libvolume_id/msdos.c
index a6604605..ca3801a8 100644
--- a/extras/volume_id/libvolume_id/msdos.c
+++ b/extras/volume_id/libvolume_id/msdos.c
@@ -38,7 +38,7 @@ struct msdos_partition_entry {
 	uint8_t		end_cyl;
 	uint32_t	start_sect;
 	uint32_t	nr_sects;
-} __attribute__((packed));
+} PACKED;
 
 #define MSDOS_MAGIC			"\x55\xaa"
 #define MSDOS_PARTTABLE_OFFSET		0x1be
diff --git a/extras/volume_id/libvolume_id/ntfs.c b/extras/volume_id/libvolume_id/ntfs.c
index de9ad6d6..fe9ff8d5 100644
--- a/extras/volume_id/libvolume_id/ntfs.c
+++ b/extras/volume_id/libvolume_id/ntfs.c
@@ -52,7 +52,7 @@ struct ntfs_super_block {
 	uint8_t		reserved2[3];
 	uint8_t		volume_serial[8];
 	uint16_t	checksum;
-} __attribute__((__packed__)) *ns;
+} PACKED *ns;
 
 struct master_file_table_record {
 	uint8_t		magic[4];
@@ -65,7 +65,7 @@ struct master_file_table_record {
 	uint16_t	flags;
 	uint32_t	bytes_in_use;
 	uint32_t	bytes_allocated;
-} __attribute__((__packed__)) *mftr;
+} PACKED *mftr;
 
 struct file_attribute {
 	uint32_t	type;
@@ -77,13 +77,13 @@ struct file_attribute {
 	uint16_t	instance;
 	uint32_t	value_len;
 	uint16_t	value_offset;
-} __attribute__((__packed__)) *attr;
+} PACKED *attr;
 
 struct volume_info {
 	uint64_t	reserved;
 	uint8_t		major_ver;
 	uint8_t		minor_ver;
-} __attribute__((__packed__)) *info;
+} PACKED *info;
 
 #define MFT_RECORD_VOLUME			3
 #define MFT_RECORD_ATTR_VOLUME_NAME		0x60
diff --git a/extras/volume_id/libvolume_id/nvidia_raid.c b/extras/volume_id/libvolume_id/nvidia_raid.c
index 3b967e69..24717aaa 100644
--- a/extras/volume_id/libvolume_id/nvidia_raid.c
+++ b/extras/volume_id/libvolume_id/nvidia_raid.c
@@ -32,7 +32,7 @@ struct nvidia_meta {
 	uint32_t	size;
 	uint32_t	chksum;
 	uint16_t	version;
-} __attribute__((packed));
+} PACKED;
 
 #define NVIDIA_SIGNATURE		"NVIDIA"
 
diff --git a/extras/volume_id/libvolume_id/ocfs.c b/extras/volume_id/libvolume_id/ocfs.c
index faf89bd3..c2f8360c 100644
--- a/extras/volume_id/libvolume_id/ocfs.c
+++ b/extras/volume_id/libvolume_id/ocfs.c
@@ -56,7 +56,7 @@ struct ocfs1_super_block_header {
 	uint64_t	new_cfg_off;
 	uint32_t	prot_bits;
 	int32_t		excl_mount;
-} __attribute__((__packed__));
+} PACKED;
 
 struct ocfs1_super_block_label {
 	struct ocfs1_disk_lock {
@@ -69,14 +69,14 @@ struct ocfs1_super_block_label {
 		uint32_t	reader_node_num;
 		uint64_t	oin_node_map;
 		uint64_t	dlock_seq_num;
-	} disk_lock __attribute__((__packed__));
+	} PACKED disk_lock;
 	uint8_t		label[64];
 	uint16_t	label_len;
 	uint8_t		vol_id[16];
 	uint16_t	vol_id_len;
 	uint8_t		cluster_name[64];
 	uint16_t	cluster_name_len;
-} __attribute__((__packed__));
+} PACKED;
 
 struct ocfs2_super_block {
 	uint8_t		i_signature[8];
@@ -125,7 +125,7 @@ struct ocfs2_super_block {
 	uint64_t	s_first_cluster_group;
 	uint8_t		s_label[64];
 	uint8_t		s_uuid[16];
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/promise_raid.c b/extras/volume_id/libvolume_id/promise_raid.c
index 6611aeab..bdf0c7b6 100644
--- a/extras/volume_id/libvolume_id/promise_raid.c
+++ b/extras/volume_id/libvolume_id/promise_raid.c
@@ -29,7 +29,7 @@
 
 struct promise_meta {
 	uint8_t	sig[24];
-} __attribute__((packed));
+} PACKED;
 
 #define PDC_CONFIG_OFF		0x1200
 #define PDC_SIGNATURE		"Promise Technology, Inc."
diff --git a/extras/volume_id/libvolume_id/reiserfs.c b/extras/volume_id/libvolume_id/reiserfs.c
index 0eecbda5..91a5bcb9 100644
--- a/extras/volume_id/libvolume_id/reiserfs.c
+++ b/extras/volume_id/libvolume_id/reiserfs.c
@@ -42,7 +42,7 @@ struct reiserfs_super_block {
 	uint32_t	dummy4[5];
 	uint8_t		uuid[16];
 	uint8_t		label[16];
-} __attribute__((__packed__));
+} PACKED;
 
 struct reiser4_super_block {
 	uint8_t		magic[16];
@@ -50,7 +50,7 @@ struct reiser4_super_block {
 	uint8_t		uuid[16];
 	uint8_t		label[16];
 	uint64_t	dummy2;
-} __attribute__((__packed__));
+} PACKED;
 
 #define REISERFS1_SUPERBLOCK_OFFSET		0x2000
 #define REISERFS_SUPERBLOCK_OFFSET		0x10000
diff --git a/extras/volume_id/libvolume_id/romfs.c b/extras/volume_id/libvolume_id/romfs.c
index 51ef3739..456077d1 100644
--- a/extras/volume_id/libvolume_id/romfs.c
+++ b/extras/volume_id/libvolume_id/romfs.c
@@ -32,7 +32,7 @@ struct romfs_super {
 	uint32_t size;
 	uint32_t checksum;
 	uint8_t name[0];
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_romfs(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/silicon_raid.c b/extras/volume_id/libvolume_id/silicon_raid.c
index a3077647..27ac9591 100644
--- a/extras/volume_id/libvolume_id/silicon_raid.c
+++ b/extras/volume_id/libvolume_id/silicon_raid.c
@@ -44,7 +44,7 @@ struct silicon_meta {
 	uint16_t	vendor_id;
 	uint16_t	minor_ver;
 	uint16_t	major_ver;
-} __attribute__((packed));
+} PACKED;
 
 #define SILICON_MAGIC		0x2F000000
 
diff --git a/extras/volume_id/libvolume_id/sysv.c b/extras/volume_id/libvolume_id/sysv.c
index fc874d5b..4aa281e9 100644
--- a/extras/volume_id/libvolume_id/sysv.c
+++ b/extras/volume_id/libvolume_id/sysv.c
@@ -56,7 +56,7 @@ struct sysv_super
 	uint32_t	s_state;
 	uint32_t	s_magic;
 	uint32_t	s_type;
-} __attribute__((__packed__));
+} PACKED;
 
 #define XENIX_NICINOD				100
 #define XENIX_NICFREE				100
@@ -82,7 +82,7 @@ struct xenix_super {
 	uint8_t		s_fill[371];
 	uint32_t	s_magic;
 	uint32_t	s_type;
-} __attribute__((__packed__));
+} PACKED;
 
 #define SYSV_SUPERBLOCK_BLOCK			0x01
 #define SYSV_MAGIC				0xfd187e20
diff --git a/extras/volume_id/libvolume_id/udf.c b/extras/volume_id/libvolume_id/udf.c
index fede1ce6..f0e0d419 100644
--- a/extras/volume_id/libvolume_id/udf.c
+++ b/extras/volume_id/libvolume_id/udf.c
@@ -37,28 +37,28 @@ struct volume_descriptor {
 		uint16_t	crc;
 		uint16_t	crc_len;
 		uint32_t	location;
-	} __attribute__((__packed__)) tag;
+	} PACKED tag;
 	union {
 		struct anchor_descriptor {
 			uint32_t	length;
 			uint32_t	location;
-		} __attribute__((__packed__)) anchor;
+		} PACKED anchor;
 		struct primary_descriptor {
 			uint32_t	seq_num;
 			uint32_t	desc_num;
 			struct dstring {
 				uint8_t	clen;
 				uint8_t	c[31];
-			} __attribute__((__packed__)) ident;
-		} __attribute__((__packed__)) primary;
-	} __attribute__((__packed__)) type;
-} __attribute__((__packed__));
+			} PACKED ident;
+		} PACKED primary;
+	} PACKED type;
+} PACKED;
 
 struct volume_structure_descriptor {
 	uint8_t		type;
 	uint8_t		id[5];
 	uint8_t		version;
-} __attribute__((__packed__));
+} PACKED;
 
 #define UDF_VSD_OFFSET			0x8000
 
diff --git a/extras/volume_id/libvolume_id/ufs.c b/extras/volume_id/libvolume_id/ufs.c
index ace61db6..2351d1f9 100644
--- a/extras/volume_id/libvolume_id/ufs.c
+++ b/extras/volume_id/libvolume_id/ufs.c
@@ -80,7 +80,7 @@ struct ufs_super_block {
 		uint32_t	cs_nbfree;
 		uint32_t	cs_nifree;
 		uint32_t	cs_nffree;
-	} __attribute__((__packed__)) fs_cstotal;
+	} PACKED fs_cstotal;
 	int8_t		fs_fmod;
 	int8_t		fs_clean;
 	int8_t		fs_ronly;
@@ -93,7 +93,7 @@ struct ufs_super_block {
 			uint32_t	fs_maxcluster;
 			uint32_t	fs_cpc;
 			uint16_t	fs_opostbl[16][8];
-		} __attribute__((__packed__)) fs_u1;
+		} PACKED fs_u1;
 		struct {
 			int8_t		fs_fsmnt[468];
 			uint8_t		fs_volname[32];
@@ -116,17 +116,17 @@ struct ufs_super_block {
 				uint64_t	cs_nffree;
 				uint64_t	cs_numclusters;
 				uint64_t	cs_spare[3];
-			} __attribute__((__packed__)) fs_cstotal;
+			} PACKED fs_cstotal;
 			struct ufs_timeval {
 				int32_t		tv_sec;
 				int32_t		tv_usec;
-			} __attribute__((__packed__)) fs_time;
+			} PACKED fs_time;
 			int64_t		fs_size;
 			int64_t		fs_dsize;
 			uint64_t	fs_csaddr;
 			int64_t		fs_pendingblocks;
 			int32_t		fs_pendinginodes;
-		} __attribute__((__packed__)) fs_u2;
+		} PACKED fs_u2;
 	}  fs_u11;
 	union {
 		struct {
@@ -136,7 +136,7 @@ struct ufs_super_block {
 			int32_t		fs_state;
 			uint32_t	fs_qbmask[2];
 			uint32_t	fs_qfmask[2];
-		} __attribute__((__packed__)) fs_sun;
+		} PACKED fs_sun;
 		struct {
 			int32_t		fs_sparecon[53];
 			int32_t		fs_reclaim;
@@ -144,7 +144,7 @@ struct ufs_super_block {
 			uint32_t	fs_npsect;
 			uint32_t	fs_qbmask[2];
 			uint32_t	fs_qfmask[2];
-		} __attribute__((__packed__)) fs_sunx86;
+		} PACKED fs_sunx86;
 		struct {
 			int32_t		fs_sparecon[50];
 			int32_t		fs_contigsumsize;
@@ -154,7 +154,7 @@ struct ufs_super_block {
 			uint32_t	fs_qbmask[2];
 			uint32_t	fs_qfmask[2];
 			int32_t		fs_state;
-		} __attribute__((__packed__)) fs_44;
+		} PACKED fs_44;
 	} fs_u2;
 	int32_t		fs_postblformat;
 	int32_t		fs_nrpos;
@@ -162,7 +162,7 @@ struct ufs_super_block {
 	int32_t		fs_rotbloff;
 	uint32_t	fs_magic;
 	uint8_t		fs_space[1];
-} __attribute__((__packed__));
+} PACKED;
 
 #define UFS_MAGIC			0x00011954
 #define UFS2_MAGIC			0x19540119
diff --git a/extras/volume_id/libvolume_id/via_raid.c b/extras/volume_id/libvolume_id/via_raid.c
index 66962cd7..375a2097 100644
--- a/extras/volume_id/libvolume_id/via_raid.c
+++ b/extras/volume_id/libvolume_id/via_raid.c
@@ -36,10 +36,10 @@ struct via_meta {
 		uint32_t	capacity_low;
 		uint32_t	capacity_high;
 		uint32_t	serial_checksum;
-	} __attribute((packed)) array;
+	} PACKED array;
 	uint32_t	serial_checksum[8];
 	uint8_t		checksum;
-} __attribute__((packed));
+} PACKED;
 
 #define VIA_SIGNATURE		0xAA55
 
diff --git a/extras/volume_id/libvolume_id/volume_id.h b/extras/volume_id/libvolume_id/volume_id.h
index edeb225f..0f265a58 100644
--- a/extras/volume_id/libvolume_id/volume_id.h
+++ b/extras/volume_id/libvolume_id/volume_id.h
@@ -16,6 +16,10 @@
 
 #define VOLUME_ID_VERSION		56
 
+#ifndef PACKED
+#define PACKED				__attribute__((packed))
+#endif
+
 #define VOLUME_ID_LABEL_SIZE		64
 #define VOLUME_ID_UUID_SIZE		36
 #define VOLUME_ID_FORMAT_SIZE		32
diff --git a/extras/volume_id/libvolume_id/vxfs.c b/extras/volume_id/libvolume_id/vxfs.c
index 0aef3698..883c1266 100644
--- a/extras/volume_id/libvolume_id/vxfs.c
+++ b/extras/volume_id/libvolume_id/vxfs.c
@@ -32,7 +32,7 @@
 struct vxfs_super {
 	uint32_t		vs_magic;
 	int32_t			vs_version;
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_vxfs(struct volume_id *id, uint64_t off)
 {
diff --git a/extras/volume_id/libvolume_id/xfs.c b/extras/volume_id/libvolume_id/xfs.c
index a5f5d843..934ed2d8 100644
--- a/extras/volume_id/libvolume_id/xfs.c
+++ b/extras/volume_id/libvolume_id/xfs.c
@@ -40,7 +40,7 @@ struct xfs_super_block {
 	uint64_t	icount;
 	uint64_t	ifree;
 	uint64_t	fdblocks;
-} __attribute__((__packed__));
+} PACKED;
 
 int volume_id_probe_xfs(struct volume_id *id, uint64_t off)
 {