[mirror_ubuntu-artful-kernel.git] / fs / xfs / xfs_linux.h

/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it would 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_LINUX__
#define __XFS_LINUX__

#include <linux/types.h>

/*
 * Kernel specific type declarations for XFS
 */
typedef signed char		__int8_t;
typedef unsigned char		__uint8_t;
typedef signed short int	__int16_t;
typedef unsigned short int	__uint16_t;
typedef signed int		__int32_t;
typedef unsigned int		__uint32_t;
typedef signed long long int	__int64_t;
typedef unsigned long long int	__uint64_t;

typedef __uint32_t		inst_t;		/* an instruction */

typedef __s64			xfs_off_t;	/* <file offset> type */
typedef unsigned long long	xfs_ino_t;	/* <inode> type */
typedef __s64			xfs_daddr_t;	/* <disk address> type */
typedef char *			xfs_caddr_t;	/* <core address> type */
typedef __u32			xfs_dev_t;
typedef __u32			xfs_nlink_t;

/* __psint_t is the same size as a pointer */
#if (BITS_PER_LONG == 32)
typedef __int32_t __psint_t;
typedef __uint32_t __psunsigned_t;
#elif (BITS_PER_LONG == 64)
typedef __int64_t __psint_t;
typedef __uint64_t __psunsigned_t;
#else
#error BITS_PER_LONG must be 32 or 64
#endif

#include "xfs_types.h"

#include "kmem.h"
#include "mrlock.h"
#include "time.h"
#include "uuid.h"

#include <linux/semaphore.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/crc32c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/file.h>
#include <linux/swap.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/bitops.h>
#include <linux/major.h>
#include <linux/pagemap.h>
#include <linux/vfs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/sort.h>
#include <linux/cpu.h>
#include <linux/notifier.h>
#include <linux/delay.h>
#include <linux/log2.h>
#include <linux/spinlock.h>
#include <linux/random.h>
#include <linux/ctype.h>
#include <linux/writeback.h>
#include <linux/capability.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/list_sort.h>
#include <linux/ratelimit.h>

#include <asm/page.h>
#include <asm/div64.h>
#include <asm/param.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

#include "xfs_vnode.h"
#include "xfs_stats.h"
#include "xfs_sysctl.h"
#include "xfs_iops.h"
#include "xfs_aops.h"
#include "xfs_super.h"
#include "xfs_cksum.h"
#include "xfs_buf.h"
#include "xfs_message.h"

#ifdef __BIG_ENDIAN
#define XFS_NATIVE_HOST 1
#else
#undef XFS_NATIVE_HOST
#endif

/*
 * Feature macros (disable/enable)
 */
#ifdef CONFIG_SMP
#define HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
#else
#undef  HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
#endif

#define irix_sgid_inherit	xfs_params.sgid_inherit.val
#define irix_symlink_mode	xfs_params.symlink_mode.val
#define xfs_panic_mask		xfs_params.panic_mask.val
#define xfs_error_level		xfs_params.error_level.val
#define xfs_syncd_centisecs	xfs_params.syncd_timer.val
#define xfs_stats_clear		xfs_params.stats_clear.val
#define xfs_inherit_sync	xfs_params.inherit_sync.val
#define xfs_inherit_nodump	xfs_params.inherit_nodump.val
#define xfs_inherit_noatime	xfs_params.inherit_noatim.val
#define xfs_inherit_nosymlinks	xfs_params.inherit_nosym.val
#define xfs_rotorstep		xfs_params.rotorstep.val
#define xfs_inherit_nodefrag	xfs_params.inherit_nodfrg.val
#define xfs_fstrm_centisecs	xfs_params.fstrm_timer.val
#define xfs_eofb_secs		xfs_params.eofb_timer.val

#define current_cpu()		(raw_smp_processor_id())
#define current_pid()		(current->pid)
#define current_test_flags(f)	(current->flags & (f))
#define current_set_flags_nested(sp, f)		\
		(*(sp) = current->flags, current->flags |= (f))
#define current_clear_flags_nested(sp, f)	\
		(*(sp) = current->flags, current->flags &= ~(f))
#define current_restore_flags_nested(sp, f)	\
		(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))

#define spinlock_destroy(lock)

#define NBBY		8		/* number of bits per byte */

/*
 * Size of block device i/o is parameterized here.
 * Currently the system supports page-sized i/o.
 */
#define	BLKDEV_IOSHIFT		PAGE_CACHE_SHIFT
#define	BLKDEV_IOSIZE		(1<<BLKDEV_IOSHIFT)
/* number of BB's per block device block */
#define	BLKDEV_BB		BTOBB(BLKDEV_IOSIZE)

#define ENOATTR		ENODATA		/* Attribute not found */
#define EWRONGFS	EINVAL		/* Mount with wrong filesystem type */
#define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
#define EFSBADCRC	EBADMSG		/* Bad CRC detected */

#define SYNCHRONIZE()	barrier()
#define __return_address __builtin_return_address(0)

#define XFS_PROJID_DEFAULT	0
#define MAXPATHLEN	1024

#define MIN(a,b)	(min(a,b))
#define MAX(a,b)	(max(a,b))
#define howmany(x, y)	(((x)+((y)-1))/(y))

/* Kernel uid/gid conversion. These are used to convert to/from the on disk
 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
 * The conversion here is type only, the value will remain the same since we
 * are converting to the init_user_ns. The uid is later mapped to a particular
 * user namespace value when crossing the kernel/user boundary.
 */
static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
{
	return from_kuid(&init_user_ns, uid);
}

static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
{
	return make_kuid(&init_user_ns, uid);
}

static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
{
	return from_kgid(&init_user_ns, gid);
}

static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
{
	return make_kgid(&init_user_ns, gid);
}

/*
 * Various platform dependent calls that don't fit anywhere else
 */
#define xfs_sort(a,n,s,fn)	sort(a,n,s,fn,NULL)
#define xfs_stack_trace()	dump_stack()


/* Move the kernel do_div definition off to one side */

#if defined __i386__
/* For ia32 we need to pull some tricks to get past various versions
 * of the compiler which do not like us using do_div in the middle
 * of large functions.
 */
static inline __u32 xfs_do_div(void *a, __u32 b, int n)
{
	__u32	mod;

	switch (n) {
		case 4:
			mod = *(__u32 *)a % b;
			*(__u32 *)a = *(__u32 *)a / b;
			return mod;
		case 8:
			{
			unsigned long __upper, __low, __high, __mod;
			__u64	c = *(__u64 *)a;
			__upper = __high = c >> 32;
			__low = c;
			if (__high) {
				__upper = __high % (b);
				__high = __high / (b);
			}
			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
			asm("":"=A" (c):"a" (__low),"d" (__high));
			*(__u64 *)a = c;
			return __mod;
			}
	}

	/* NOTREACHED */
	return 0;
}

/* Side effect free 64 bit mod operation */
static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
{
	switch (n) {
		case 4:
			return *(__u32 *)a % b;
		case 8:
			{
			unsigned long __upper, __low, __high, __mod;
			__u64	c = *(__u64 *)a;
			__upper = __high = c >> 32;
			__low = c;
			if (__high) {
				__upper = __high % (b);
				__high = __high / (b);
			}
			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
			asm("":"=A" (c):"a" (__low),"d" (__high));
			return __mod;
			}
	}

	/* NOTREACHED */
	return 0;
}
#else
static inline __u32 xfs_do_div(void *a, __u32 b, int n)
{
	__u32	mod;

	switch (n) {
		case 4:
			mod = *(__u32 *)a % b;
			*(__u32 *)a = *(__u32 *)a / b;
			return mod;
		case 8:
			mod = do_div(*(__u64 *)a, b);
			return mod;
	}

	/* NOTREACHED */
	return 0;
}

/* Side effect free 64 bit mod operation */
static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
{
	switch (n) {
		case 4:
			return *(__u32 *)a % b;
		case 8:
			{
			__u64	c = *(__u64 *)a;
			return do_div(c, b);
			}
	}

	/* NOTREACHED */
	return 0;
}
#endif

#undef do_div
#define do_div(a, b)	xfs_do_div(&(a), (b), sizeof(a))
#define do_mod(a, b)	xfs_do_mod(&(a), (b), sizeof(a))

static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
{
	x += y - 1;
	do_div(x, y);
	return x * y;
}

static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
{
	x += y - 1;
	do_div(x, y);
	return x;
}

/* ARM old ABI has some weird alignment/padding */
#if defined(__arm__) && !defined(__ARM_EABI__)
#define __arch_pack __attribute__((packed))
#else
#define __arch_pack
#endif

#define ASSERT_ALWAYS(expr)	\
	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))

#ifdef DEBUG
#define ASSERT(expr)	\
	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))

#ifndef STATIC
# define STATIC noinline
#endif

#else	/* !DEBUG */

#ifdef XFS_WARN

#define ASSERT(expr)	\
	(unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))

#ifndef STATIC
# define STATIC static noinline
#endif

#else	/* !DEBUG && !XFS_WARN */

#define ASSERT(expr)	((void)0)

#ifndef STATIC
# define STATIC static noinline
#endif

#endif /* XFS_WARN */
#endif /* DEBUG */

#endif /* __XFS_LINUX__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_LINUX__
	19	#define __XFS_LINUX__
	20
	21	#include <linux/types.h>
1da177e4	22
4f3d71f6 DC	23	/*
	24	* Kernel specific type declarations for XFS
	25	*/
	26	typedef signed char __int8_t;
	27	typedef unsigned char __uint8_t;
	28	typedef signed short int __int16_t;
	29	typedef unsigned short int __uint16_t;
	30	typedef signed int __int32_t;
	31	typedef unsigned int __uint32_t;
	32	typedef signed long long int __int64_t;
	33	typedef unsigned long long int __uint64_t;
	34
	35	typedef __uint32_t inst_t; /* an instruction */
	36
	37	typedef __s64 xfs_off_t; /* <file offset> type */
	38	typedef unsigned long long xfs_ino_t; /* <inode> type */
	39	typedef __s64 xfs_daddr_t; /* <disk address> type */
	40	typedef char * xfs_caddr_t; /* <core address> type */
	41	typedef __u32 xfs_dev_t;
	42	typedef __u32 xfs_nlink_t;
	43
	44	/* __psint_t is the same size as a pointer */
	45	#if (BITS_PER_LONG == 32)
	46	typedef __int32_t __psint_t;
	47	typedef __uint32_t __psunsigned_t;
	48	#elif (BITS_PER_LONG == 64)
	49	typedef __int64_t __psint_t;
	50	typedef __uint64_t __psunsigned_t;
	51	#else
	52	#error BITS_PER_LONG must be 32 or 64
	53	#endif
	54
06f8e2d6	55	#include "xfs_types.h"
1da177e4	56
06f8e2d6 AE	57	#include "kmem.h"
	58	#include "mrlock.h"
	59	#include "time.h"
	60	#include "uuid.h"
1da177e4	61
ab4a9b04	62	#include <linux/semaphore.h>
1da177e4 LT	63	#include <linux/mm.h>
	64	#include <linux/kernel.h>
	65	#include <linux/blkdev.h>
	66	#include <linux/slab.h>
bc02e869	67	#include <linux/crc32c.h>
1da177e4	68	#include <linux/module.h>
a0b0b8a5	69	#include <linux/mutex.h>
1da177e4 LT	70	#include <linux/file.h>
	71	#include <linux/swap.h>
	72	#include <linux/errno.h>
	73	#include <linux/sched.h>
	74	#include <linux/bitops.h>
	75	#include <linux/major.h>
	76	#include <linux/pagemap.h>
	77	#include <linux/vfs.h>
	78	#include <linux/seq_file.h>
	79	#include <linux/init.h>
	80	#include <linux/list.h>
	81	#include <linux/proc_fs.h>
1da177e4	82	#include <linux/sort.h>
e8234a68 DC	83	#include <linux/cpu.h>
e8234a68 DC	84	#include <linux/notifier.h>
01e1b69c	85	#include <linux/delay.h>
af3a2e8a	86	#include <linux/log2.h>
007c61c6	87	#include <linux/spinlock.h>
64275ea4	88	#include <linux/random.h>
189f4bf2	89	#include <linux/ctype.h>
6bfb3d06	90	#include <linux/writeback.h>
6c77b0ea	91	#include <linux/capability.h>
0030807c CH	92	#include <linux/kthread.h>
0030807c CH	93	#include <linux/freezer.h>
8a072a4d	94	#include <linux/list_sort.h>
3d6e0361	95	#include <linux/ratelimit.h>
1da177e4 LT	96
	97	#include <asm/page.h>
	98	#include <asm/div64.h>
	99	#include <asm/param.h>
	100	#include <asm/uaccess.h>
	101	#include <asm/byteorder.h>
	102	#include <asm/unaligned.h>
	103
06f8e2d6 AE	104	#include "xfs_vnode.h"
	105	#include "xfs_stats.h"
	106	#include "xfs_sysctl.h"
	107	#include "xfs_iops.h"
	108	#include "xfs_aops.h"
	109	#include "xfs_super.h"
51582170	110	#include "xfs_cksum.h"
06f8e2d6 AE	111	#include "xfs_buf.h"
06f8e2d6 AE	112	#include "xfs_message.h"
1da177e4	113
218106a1 CH	114	#ifdef __BIG_ENDIAN
	115	#define XFS_NATIVE_HOST 1
	116	#else
	117	#undef XFS_NATIVE_HOST
	118	#endif
	119
1da177e4 LT	120	/*
	121	* Feature macros (disable/enable)
	122	*/
d2c32edf	123	#ifdef CONFIG_SMP
8d280b98 DC	124	#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	125	#else
	126	#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	127	#endif
1da177e4	128
1da177e4 LT	129	#define irix_sgid_inherit xfs_params.sgid_inherit.val
	130	#define irix_symlink_mode xfs_params.symlink_mode.val
	131	#define xfs_panic_mask xfs_params.panic_mask.val
	132	#define xfs_error_level xfs_params.error_level.val
	133	#define xfs_syncd_centisecs xfs_params.syncd_timer.val
	134	#define xfs_stats_clear xfs_params.stats_clear.val
	135	#define xfs_inherit_sync xfs_params.inherit_sync.val
	136	#define xfs_inherit_nodump xfs_params.inherit_nodump.val
	137	#define xfs_inherit_noatime xfs_params.inherit_noatim.val
1da177e4 LT	138	#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
1da177e4 LT	139	#define xfs_rotorstep xfs_params.rotorstep.val
d3446eac	140	#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
2a82b8be	141	#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
579b62fa	142	#define xfs_eofb_secs xfs_params.eofb_timer.val
1da177e4	143
59c1b082	144	#define current_cpu() (raw_smp_processor_id())
1da177e4	145	#define current_pid() (current->pid)
59c1b082	146	#define current_test_flags(f) (current->flags & (f))
59c1b082 NS	147	#define current_set_flags_nested(sp, f) \
	148	(*(sp) = current->flags, current->flags \|= (f))
	149	#define current_clear_flags_nested(sp, f) \
	150	(*(sp) = current->flags, current->flags &= ~(f))
	151	#define current_restore_flags_nested(sp, f) \
	152	(current->flags = ((current->flags & ~(f)) \| (*(sp) & (f))))
1da177e4	153
007c61c6 ES	154	#define spinlock_destroy(lock)
007c61c6 ES	155
1da177e4	156	#define NBBY 8 /* number of bits per byte */
1da177e4 LT	157
	158	/*
	159	* Size of block device i/o is parameterized here.
	160	* Currently the system supports page-sized i/o.
	161	*/
e6a4b37f	162	#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
1da177e4 LT	163	#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
	164	/* number of BB's per block device block */
	165	#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
	166
1da177e4	167	#define ENOATTR ENODATA /* Attribute not found */
da2f4d67 NS	168	#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
da2f4d67 NS	169	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
ca23f8fd	170	#define EFSBADCRC EBADMSG /* Bad CRC detected */
1da177e4 LT	171
	172	#define SYNCHRONIZE() barrier()
	173	#define __return_address __builtin_return_address(0)
	174
6743099c	175	#define XFS_PROJID_DEFAULT 0
1da177e4 LT	176	#define MAXPATHLEN 1024
	177
	178	#define MIN(a,b) (min(a,b))
	179	#define MAX(a,b) (max(a,b))
	180	#define howmany(x, y) (((x)+((y)-1))/(y))
1da177e4	181
c5eeb7ec DE	182	/* Kernel uid/gid conversion. These are used to convert to/from the on disk
	183	* uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
	184	* The conversion here is type only, the value will remain the same since we
	185	* are converting to the init_user_ns. The uid is later mapped to a particular
	186	* user namespace value when crossing the kernel/user boundary.
	187	*/
	188	static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
	189	{
	190	return from_kuid(&init_user_ns, uid);
	191	}
	192
	193	static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
	194	{
	195	return make_kuid(&init_user_ns, uid);
	196	}
	197
	198	static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
	199	{
	200	return from_kgid(&init_user_ns, gid);
	201	}
	202
	203	static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
	204	{
	205	return make_kgid(&init_user_ns, gid);
	206	}
	207
cde410a9 NS	208	/*
	209	* Various platform dependent calls that don't fit anywhere else
	210	*/
380b5dc0	211	#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
1da177e4	212	#define xfs_stack_trace() dump_stack()
1da177e4 LT	213
	214
	215	/* Move the kernel do_div definition off to one side */
	216
	217	#if defined __i386__
	218	/* For ia32 we need to pull some tricks to get past various versions
	219	* of the compiler which do not like us using do_div in the middle
	220	* of large functions.
	221	*/
	222	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
	223	{
	224	__u32 mod;
	225
	226	switch (n) {
	227	case 4:
	228	mod = (__u32 )a % b;
	229	(__u32 )a = (__u32 )a / b;
	230	return mod;
	231	case 8:
	232	{
	233	unsigned long __upper, __low, __high, __mod;
	234	__u64 c = (__u64 )a;
	235	__upper = __high = c >> 32;
	236	__low = c;
	237	if (__high) {
	238	__upper = __high % (b);
	239	__high = __high / (b);
	240	}
	241	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	242	asm("":"=A" (c):"a" (__low),"d" (__high));
	243	(__u64 )a = c;
	244	return __mod;
	245	}
	246	}
	247
	248	/* NOTREACHED */
	249	return 0;
	250	}
	251
	252	/* Side effect free 64 bit mod operation */
	253	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
	254	{
	255	switch (n) {
	256	case 4:
	257	return (__u32 )a % b;
	258	case 8:
	259	{
	260	unsigned long __upper, __low, __high, __mod;
	261	__u64 c = (__u64 )a;
	262	__upper = __high = c >> 32;
	263	__low = c;
	264	if (__high) {
	265	__upper = __high % (b);
	266	__high = __high / (b);
	267	}
	268	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	269	asm("":"=A" (c):"a" (__low),"d" (__high));
	270	return __mod;
	271	}
	272	}
	273
	274	/* NOTREACHED */
	275	return 0;
	276	}
277	#else
278	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
279	{
280	__u32 mod;
281
282	switch (n) {
283	case 4:
284	mod = (__u32 )a % b;
285	(__u32 )a = (__u32 )a / b;
286	return mod;
287	case 8:
288	mod = do_div((__u64 )a, b);
289	return mod;
290	}
291
292	/* NOTREACHED */
293	return 0;
294	}
295
296	/* Side effect free 64 bit mod operation */
297	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
298	{
299	switch (n) {
300	case 4:
301	return (__u32 )a % b;
302	case 8:
303	{
304	__u64 c = (__u64 )a;
305	return do_div(c, b);
306	}
307	}
308
309	/* NOTREACHED */
310	return 0;
311	}
312	#endif
313
314	#undef do_div
315	#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
316	#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
317
318	static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
319	{
320	x += y - 1;
321	do_div(x, y);
d99831ff	322	return x * y;
1da177e4 LT	323	}
1da177e4 LT	324
68c32715 NS	325	static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
	326	{
	327	x += y - 1;
	328	do_div(x, y);
	329	return x;
	330	}
	331
ae23a5e8 ES	332	/* ARM old ABI has some weird alignment/padding */
	333	#if defined(__arm__) && !defined(__ARM_EABI__)
	334	#define __arch_pack __attribute__((packed))
	335	#else
	336	#define __arch_pack
	337	#endif
	338
9130090b DC	339	#define ASSERT_ALWAYS(expr) \
	340	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
	341
742ae1e3 DC	342	#ifdef DEBUG
	343	#define ASSERT(expr) \
	344	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
9130090b DC	345
9130090b DC	346	#ifndef STATIC
742ae1e3	347	# define STATIC noinline
9130090b DC	348	#endif
9130090b DC	349
742ae1e3 DC	350	#else /* !DEBUG */
	351
	352	#ifdef XFS_WARN
9130090b DC	353
9130090b DC	354	#define ASSERT(expr) \
742ae1e3	355	(unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
9130090b DC	356
9130090b DC	357	#ifndef STATIC
742ae1e3 DC	358	# define STATIC static noinline
	359	#endif
	360
	361	#else /* !DEBUG && !XFS_WARN */
	362
	363	#define ASSERT(expr) ((void)0)
	364
	365	#ifndef STATIC
	366	# define STATIC static noinline
9130090b DC	367	#endif
9130090b DC	368
742ae1e3	369	#endif /* XFS_WARN */
9130090b DC	370	#endif /* DEBUG */
9130090b DC	371
1da177e4	372	#endif /* __XFS_LINUX__ */