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Message-ID: <Pine.LNX.4.64.0612170738410.24046@localhost.localdomain>
Date: Sun, 17 Dec 2006 07:43:39 -0500 (EST)
From: "Robert P. J. Day" <rpjday@...dspring.com>
To: Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: [RFC][PATCH] Rewrite unnecessary duplicated code to use FIELD_SIZEOF().
as with ARRAY_SIZE(), there are a number of places (mercifully, far
fewer) that recode what could be done with the FIELD_SIZEOF() macro in
kernel.h.
i wrote a short script to handle that and this is the result (after
a minor amount of hand tweaking):
arch/m68k/kernel/signal.c | 30 +++++++++++-----------
arch/um/drivers/net_kern.c | 2 -
drivers/block/viodasd.c | 2 -
drivers/net/e1000/e1000_ethtool.c | 2 -
drivers/net/ixgb/ixgb_ethtool.c | 2 -
drivers/net/mv643xx_eth.c | 2 -
drivers/net/netxen/netxen_nic_ethtool.c | 2 -
drivers/usb/atm/usbatm.c | 2 -
drivers/usb/net/cdc_ether.c | 2 -
drivers/usb/net/usbnet.c | 2 -
drivers/usb/serial/io_usbvend.h | 8 ++---
fs/ext2/xattr.c | 2 -
fs/ext3/xattr.c | 2 -
fs/ext4/xattr.c | 2 -
fs/mbcache.c | 2 -
include/acpi/actbl.h | 2 -
include/asm-powerpc/fs_pd.h | 2 -
include/net/sctp/sctp.h | 2 -
18 files changed, 35 insertions(+), 35 deletions(-)
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index f9af893..c99517e 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -54,21 +54,21 @@
asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);
const int frame_extra_sizes[16] = {
- [1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */
- [2] = sizeof(((struct frame *)0)->un.fmt2),
- [3] = sizeof(((struct frame *)0)->un.fmt3),
- [4] = sizeof(((struct frame *)0)->un.fmt4),
- [5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */
- [6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */
- [7] = sizeof(((struct frame *)0)->un.fmt7),
- [8] = -1, /* sizeof(((struct frame *)0)->un.fmt8), */
- [9] = sizeof(((struct frame *)0)->un.fmt9),
- [10] = sizeof(((struct frame *)0)->un.fmta),
- [11] = sizeof(((struct frame *)0)->un.fmtb),
- [12] = -1, /* sizeof(((struct frame *)0)->un.fmtc), */
- [13] = -1, /* sizeof(((struct frame *)0)->un.fmtd), */
- [14] = -1, /* sizeof(((struct frame *)0)->un.fmte), */
- [15] = -1, /* sizeof(((struct frame *)0)->un.fmtf), */
+ [1] = -1, /* FIELD_SIZEOF(struct frame, un.fmt1), */
+ [2] = FIELD_SIZEOF(struct frame, un.fmt2),
+ [3] = FIELD_SIZEOF(struct frame, un.fmt3),
+ [4] = FIELD_SIZEOF(struct frame, un.fmt4),
+ [5] = -1, /* FIELD_SIZEOF(struct frame, un.fmt5), */
+ [6] = -1, /* FIELD_SIZEOF(struct frame, un.fmt6), */
+ [7] = FIELD_SIZEOF(struct frame, un.fmt7),
+ [8] = -1, /* FIELD_SIZEOF(struct frame, un.fmt8), */
+ [9] = FIELD_SIZEOF(struct frame, un.fmt9),
+ [10] = FIELD_SIZEOF(struct frame, un.fmta),
+ [11] = FIELD_SIZEOF(struct frame, un.fmtb),
+ [12] = -1, /* FIELD_SIZEOF(struct frame, un.fmtc), */
+ [13] = -1, /* FIELD_SIZEOF(struct frame, un.fmtd), */
+ [14] = -1, /* FIELD_SIZEOF(struct frame, un.fmte), */
+ [15] = -1, /* FIELD_SIZEOF(struct frame, un.fmtf), */
};
/*
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index afe3d42..07adda0 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -334,7 +334,7 @@ static int eth_configure(int n, void *init, char *mac,
int save, err, size;
size = transport->private_size + sizeof(struct uml_net_private) +
- sizeof(((struct uml_net_private *) 0)->user);
+ FIELD_SIZEOF(struct uml_net_private, user);
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (device == NULL) {
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index e19ba4e..a2825cf 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -68,7 +68,7 @@ MODULE_LICENSE("GPL");
enum {
PARTITION_SHIFT = 3,
MAX_DISKNO = HVMAXARCHITECTEDVIRTUALDISKS,
- MAX_DISK_NAME = sizeof(((struct gendisk *)0)->disk_name)
+ MAX_DISK_NAME = FIELD_SIZEOF(struct gendisk, disk_name)
};
static DEFINE_SPINLOCK(viodasd_spinlock);
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index da459f7..c00d358 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -53,7 +53,7 @@ struct e1000_stats {
int stat_offset;
};
-#define E1000_STAT(m) sizeof(((struct e1000_adapter *)0)->m), \
+#define E1000_STAT(m) FIELD_SIZEOF(struct e1000_adapter, m), \
offsetof(struct e1000_adapter, m)
static const struct e1000_stats e1000_gstrings_stats[] = {
{ "rx_packets", E1000_STAT(stats.gprc) },
diff --git a/drivers/net/ixgb/ixgb_ethtool.c b/drivers/net/ixgb/ixgb_ethtool.c
index cd22523..4ee1b23 100644
--- a/drivers/net/ixgb/ixgb_ethtool.c
+++ b/drivers/net/ixgb/ixgb_ethtool.c
@@ -52,7 +52,7 @@ struct ixgb_stats {
int stat_offset;
};
-#define IXGB_STAT(m) sizeof(((struct ixgb_adapter *)0)->m), \
+#define IXGB_STAT(m) FIELD_SIZEOF(struct ixgb_adapter, m), \
offsetof(struct ixgb_adapter, m)
static struct ixgb_stats ixgb_gstrings_stats[] = {
{"rx_packets", IXGB_STAT(net_stats.rx_packets)},
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index c41ae42..3872471 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -2652,7 +2652,7 @@ struct mv643xx_stats {
int stat_offset;
};
-#define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \
+#define MV643XX_STAT(m) FIELD_SIZEOF(struct mv643xx_private, m), \
offsetof(struct mv643xx_private, m)
static const struct mv643xx_stats mv643xx_gstrings_stats[] = {
diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c
index 2ab4885..938c6ea 100644
--- a/drivers/net/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/netxen/netxen_nic_ethtool.c
@@ -50,7 +50,7 @@ struct netxen_nic_stats {
int stat_offset;
};
-#define NETXEN_NIC_STAT(m) sizeof(((struct netxen_port *)0)->m), \
+#define NETXEN_NIC_STAT(m) FIELD_SIZEOF(struct netxen_port, m), \
offsetof(struct netxen_port, m)
#define NETXEN_NIC_PORT_WINDOW 0x10000
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index ec63b0e..0be22a3 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -1332,7 +1332,7 @@ static int __init usbatm_usb_init(void)
{
dbg("%s: driver version %s", __func__, DRIVER_VERSION);
- if (sizeof(struct usbatm_control) > sizeof(((struct sk_buff *) 0)->cb)) {
+ if (sizeof(struct usbatm_control) > FIELD_SIZEOF(struct sk_buff, cb)) {
printk(KERN_ERR "%s unusable with this kernel!\n", usbatm_driver_name);
return -EIO;
}
diff --git a/drivers/usb/net/cdc_ether.c b/drivers/usb/net/cdc_ether.c
index 44a9154..dbc2ba3 100644
--- a/drivers/usb/net/cdc_ether.c
+++ b/drivers/usb/net/cdc_ether.c
@@ -497,7 +497,7 @@ static struct usb_driver cdc_driver = {
static int __init cdc_init(void)
{
- BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
+ BUILD_BUG_ON((FIELD_SIZEOF(struct usbnet, data)
< sizeof(struct cdc_state)));
return usb_register(&cdc_driver);
diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c
index 6e39e99..03cef6c 100644
--- a/drivers/usb/net/usbnet.c
+++ b/drivers/usb/net/usbnet.c
@@ -1283,7 +1283,7 @@ EXPORT_SYMBOL_GPL(usbnet_resume);
static int __init usbnet_init(void)
{
/* compiler should optimize this out */
- BUILD_BUG_ON (sizeof (((struct sk_buff *)0)->cb)
+ BUILD_BUG_ON (FIELD_SIZEOF(struct sk_buff, cb)
< sizeof (struct skb_data));
random_ether_addr(node_id);
diff --git a/drivers/usb/serial/io_usbvend.h b/drivers/usb/serial/io_usbvend.h
index f1804fd..b967389 100644
--- a/drivers/usb/serial/io_usbvend.h
+++ b/drivers/usb/serial/io_usbvend.h
@@ -507,10 +507,10 @@ struct edge_manuf_descriptor {
#define MANUF_BOARD_REV_A 1 // First rev of 251+Netchip design
-#define MANUF_SERNUM_LENGTH sizeof(((struct edge_manuf_descriptor *)0)->SerialNumber)
-#define MANUF_ASSYNUM_LENGTH sizeof(((struct edge_manuf_descriptor *)0)->AssemblyNumber)
-#define MANUF_OEMASSYNUM_LENGTH sizeof(((struct edge_manuf_descriptor *)0)->OemAssyNumber)
-#define MANUF_MANUFDATE_LENGTH sizeof(((struct edge_manuf_descriptor *)0)->ManufDate)
+#define MANUF_SERNUM_LENGTH FIELD_SIZEOF(struct edge_manuf_descriptor, SerialNumber)
+#define MANUF_ASSYNUM_LENGTH FIELD_SIZEOF(struct edge_manuf_descriptor, AssemblyNumber)
+#define MANUF_OEMASSYNUM_LENGTH FIELD_SIZEOF(struct edge_manuf_descriptor, OemAssyNumber)
+#define MANUF_MANUFDATE_LENGTH FIELD_SIZEOF(struct edge_manuf_descriptor, ManufDate)
#define MANUF_ION_CONFIG_DIAG_NO_LOOP 0x20 // As below but no ext loopback test
#define MANUF_ION_CONFIG_DIAG 0x40 // 930 based device: 1=Run h/w diags, 0=norm
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 247efd0..bd58220 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -1024,7 +1024,7 @@ init_ext2_xattr(void)
{
ext2_xattr_cache = mb_cache_create("ext2_xattr", NULL,
sizeof(struct mb_cache_entry) +
- sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]), 1, 6);
+ FIELD_SIZEOF(struct mb_cache_entry, e_indexes[0]), 1, 6);
if (!ext2_xattr_cache)
return -ENOMEM;
return 0;
diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 99857a4..0c89380 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -1299,7 +1299,7 @@ init_ext3_xattr(void)
{
ext3_xattr_cache = mb_cache_create("ext3_xattr", NULL,
sizeof(struct mb_cache_entry) +
- sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]), 1, 6);
+ FIELD_SIZEOF(struct mb_cache_entry, e_indexes[0]), 1, 6);
if (!ext3_xattr_cache)
return -ENOMEM;
return 0;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index dc969c3..e52d7f8 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1299,7 +1299,7 @@ init_ext4_xattr(void)
{
ext4_xattr_cache = mb_cache_create("ext4_xattr", NULL,
sizeof(struct mb_cache_entry) +
- sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]), 1, 6);
+ FIELD_SIZEOF(struct mb_cache_entry, e_indexes[0]), 1, 6);
if (!ext4_xattr_cache)
return -ENOMEM;
return 0;
diff --git a/fs/mbcache.c b/fs/mbcache.c
index deeb9dc..4b987c3 100644
--- a/fs/mbcache.c
+++ b/fs/mbcache.c
@@ -255,7 +255,7 @@ mb_cache_create(const char *name, struct mb_cache_op *cache_op,
struct mb_cache *cache = NULL;
if(entry_size < sizeof(struct mb_cache_entry) +
- indexes_count * sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]))
+ indexes_count * FIELD_SIZEOF(struct mb_cache_entry, e_indexes[0]))
return NULL;
cache = kmalloc(sizeof(struct mb_cache) +
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index b125cee..8b9dd97 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -317,7 +317,7 @@ struct fadt_descriptor_rev1 {
* are removed and replaced by a Flags field.
*/
#define ACPI_FLAG_OFFSET(d,f,o) (u8) (ACPI_OFFSET (d,f) + \
- sizeof(((d *)0)->f) + o)
+ FIELD_SIZEOF(d, f) + o)
/*
* Get the remaining ACPI tables
*/
diff --git a/include/asm-powerpc/fs_pd.h b/include/asm-powerpc/fs_pd.h
index 3d0e819..efb6d55 100644
--- a/include/asm-powerpc/fs_pd.h
+++ b/include/asm-powerpc/fs_pd.h
@@ -29,7 +29,7 @@ static inline int uart_clock(void)
({ \
u32 offset = offsetof(cpm2_map_t, member); \
void *addr = ioremap (CPM_MAP_ADDR + offset, \
- sizeof( ((cpm2_map_t*)0)->member)); \
+ FIELD_SIZEOF(cpm2_map_t, member)); \
addr; \
})
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index c818f87..d929d18 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -601,7 +601,7 @@ static inline int param_type2af(__be16 type)
static inline int sctp_sanity_check(void)
{
SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
- sizeof(((struct sk_buff *)0)->cb),
+ FIELD_SIZEOF(struct sk_buff, cb),
"SCTP: ulpevent does not fit in skb!\n", return 0);
return 1;
-
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