jfs: get rid of homegrown endianness helpers
Get rid of le24 stuff, along with the bitfields use - all that stuff can be done with standard stuff, in sparse-verifiable manner. Moreover, that way (shift-and-mask) often generates better code - gcc optimizer sucks on bitfields... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com> ----wifi-calibration
Al Viro
Dave Kleikamp
parent
53262d12d1
commit
e1f1fe798d
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@ -1,49 +0,0 @@
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/*
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* Copyright (C) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_ENDIAN24
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#define _H_ENDIAN24
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/*
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* endian24.h:
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*
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* Endian conversion for 24-byte data
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*
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*/
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#define __swab24(x) \
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({ \
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__u32 __x = (x); \
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((__u32)( \
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((__x & (__u32)0x000000ffUL) << 16) | \
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(__x & (__u32)0x0000ff00UL) | \
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((__x & (__u32)0x00ff0000UL) >> 16) )); \
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})
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#if (defined(__KERNEL__) && defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN))
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#define __cpu_to_le24(x) ((__u32)(x))
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#define __le24_to_cpu(x) ((__u32)(x))
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#else
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#define __cpu_to_le24(x) __swab24(x)
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#define __le24_to_cpu(x) __swab24(x)
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#endif
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#ifdef __KERNEL__
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#define cpu_to_le24 __cpu_to_le24
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#define le24_to_cpu __le24_to_cpu
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#endif
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#endif /* !_H_ENDIAN24 */
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@ -1040,8 +1040,8 @@ static int dtSplitUp(tid_t tid,
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pxdlist.maxnpxd = 1;
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pxdlist.npxd = 0;
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pxd = &pxdlist.pxd[0];
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PXDaddress(pxd, nxaddr)
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PXDlength(pxd, xlen + n);
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PXDaddress(pxd, nxaddr);
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PXDlength(pxd, xlen + n);
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split->pxdlist = &pxdlist;
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if ((rc = dtExtendPage(tid, ip, split, btstack))) {
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nxaddr = addressPXD(pxd);
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@ -30,8 +30,6 @@
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#include <linux/types.h>
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#include <linux/nls.h>
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#include "endian24.h"
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/*
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* transaction and lock id's
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*
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@ -59,26 +57,42 @@ struct timestruc_t {
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/*
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* physical xd (pxd)
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*
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* The leftmost 24 bits of len_addr are the extent length.
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* The rightmost 8 bits of len_addr are the most signficant bits of
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* the extent address
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*/
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typedef struct {
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unsigned len:24;
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unsigned addr1:8;
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__le32 len_addr;
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__le32 addr2;
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} pxd_t;
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/* xd_t field construction */
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#define PXDlength(pxd, length32) ((pxd)->len = __cpu_to_le24(length32))
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#define PXDaddress(pxd, address64)\
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{\
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(pxd)->addr1 = ((s64)address64) >> 32;\
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(pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
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static inline void PXDlength(pxd_t *pxd, __u32 len)
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{
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pxd->len_addr = (pxd->len_addr & cpu_to_le32(~0xffffff)) |
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cpu_to_le32(len & 0xffffff);
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}
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static inline void PXDaddress(pxd_t *pxd, __u64 addr)
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{
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pxd->len_addr = (pxd->len_addr & cpu_to_le32(0xffffff)) |
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cpu_to_le32((addr >> 32)<<24);
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pxd->addr2 = cpu_to_le32(addr & 0xffffffff);
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}
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/* xd_t field extraction */
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#define lengthPXD(pxd) __le24_to_cpu((pxd)->len)
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#define addressPXD(pxd)\
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( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2))
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static inline __u32 lengthPXD(pxd_t *pxd)
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{
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return le32_to_cpu((pxd)->len_addr) & 0xffffff;
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}
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static inline __u64 addressPXD(pxd_t *pxd)
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{
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__u64 n = le32_to_cpu(pxd->len_addr) & ~0xffffff;
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return (n << 8) + le32_to_cpu(pxd->addr2);
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}
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#define MAXTREEHEIGHT 8
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/* pxd list */
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@ -93,12 +107,10 @@ struct pxdlist {
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* data extent descriptor (dxd)
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*/
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typedef struct {
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unsigned flag:8; /* 1: flags */
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unsigned rsrvd:24;
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__u8 flag; /* 1: flags */
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__u8 rsrvd[3];
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__le32 size; /* 4: size in byte */
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unsigned len:24; /* 3: length in unit of fsblksize */
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unsigned addr1:8; /* 1: address in unit of fsblksize */
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__le32 addr2; /* 4: address in unit of fsblksize */
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pxd_t loc; /* 8: address and length in unit of fsblksize */
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} dxd_t; /* - 16 - */
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/* dxd_t flags */
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@ -109,12 +121,11 @@ typedef struct {
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#define DXD_CORRUPT 0x08 /* Inconsistency detected */
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/* dxd_t field construction
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* Conveniently, the PXD macros work for DXD
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*/
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#define DXDlength PXDlength
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#define DXDaddress PXDaddress
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#define lengthDXD lengthPXD
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#define addressDXD addressPXD
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#define DXDlength(dxd, len) PXDlength(&(dxd)->loc, len)
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#define DXDaddress(dxd, addr) PXDaddress(&(dxd)->loc, addr)
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#define lengthDXD(dxd) lengthPXD(&(dxd)->loc)
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#define addressDXD(dxd) addressPXD(&(dxd)->loc)
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#define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
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#define sizeDXD(dxd) le32_to_cpu((dxd)->size)
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@ -29,13 +29,11 @@
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* extent allocation descriptor (xad)
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*/
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typedef struct xad {
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unsigned flag:8; /* 1: flag */
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unsigned rsvrd:16; /* 2: reserved */
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unsigned off1:8; /* 1: offset in unit of fsblksize */
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__le32 off2; /* 4: offset in unit of fsblksize */
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unsigned len:24; /* 3: length in unit of fsblksize */
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unsigned addr1:8; /* 1: address in unit of fsblksize */
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__le32 addr2; /* 4: address in unit of fsblksize */
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__u8 flag; /* 1: flag */
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__u8 rsvrd[2]; /* 2: reserved */
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__u8 off1; /* 1: offset in unit of fsblksize */
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__le32 off2; /* 4: offset in unit of fsblksize */
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pxd_t loc; /* 8: length and address in unit of fsblksize */
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} xad_t; /* (16) */
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#define MAXXLEN ((1 << 24) - 1)
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@ -49,19 +47,14 @@ typedef struct xad {
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(xad)->off1 = ((u64)offset64) >> 32;\
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(xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
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}
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#define XADaddress(xad, address64)\
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{\
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(xad)->addr1 = ((u64)address64) >> 32;\
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(xad)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
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}
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#define XADlength(xad, length32) (xad)->len = __cpu_to_le24(length32)
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#define XADaddress(xad, address64) PXDaddress(&(xad)->loc, address64)
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#define XADlength(xad, length32) PXDlength(&(xad)->loc, length32)
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/* xad_t field extraction */
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#define offsetXAD(xad)\
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( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
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#define addressXAD(xad)\
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( ((s64)((xad)->addr1)) << 32 | __le32_to_cpu((xad)->addr2))
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#define lengthXAD(xad) __le24_to_cpu((xad)->len)
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#define addressXAD(xad) addressPXD(&(xad)->loc)
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#define lengthXAD(xad) lengthPXD(&(xad)->loc)
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/* xad list */
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struct xadlist {
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