mirror of https://gitee.com/openkylin/linux.git
bio, fs: separate out bio_types.h and define READ/WRITE constants in terms of BIO_RW_* flags
linux/fs.h hard coded READ/WRITE constants which should match BIO_RW_* flags. This is fragile and caused breakage during BIO_RW_* flag rearrangement. The hardcoding is to avoid include dependency hell. Create linux/bio_types.h which contatins definitions for bio data structures and flags and include it from bio.h and fs.h, and make fs.h define all READ/WRITE related constants in terms of BIO_RW_* flags. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Tejun Heo
Jens Axboe
parent
aca27ba961
commit
7cc015811e
|
|
@ -9,7 +9,7 @@
|
|||
*
|
||||
* 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.
|
||||
*
|
||||
|
|
@ -28,6 +28,9 @@
|
|||
|
||||
#include <asm/io.h>
|
||||
|
||||
/* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */
|
||||
#include <linux/blk_types.h>
|
||||
|
||||
#define BIO_DEBUG
|
||||
|
||||
#ifdef BIO_DEBUG
|
||||
|
|
@ -40,184 +43,6 @@
|
|||
#define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_CACHE_SHIFT)
|
||||
#define BIO_MAX_SECTORS (BIO_MAX_SIZE >> 9)
|
||||
|
||||
/*
|
||||
* was unsigned short, but we might as well be ready for > 64kB I/O pages
|
||||
*/
|
||||
struct bio_vec {
|
||||
struct page *bv_page;
|
||||
unsigned int bv_len;
|
||||
unsigned int bv_offset;
|
||||
};
|
||||
|
||||
struct bio_set;
|
||||
struct bio;
|
||||
struct bio_integrity_payload;
|
||||
typedef void (bio_end_io_t) (struct bio *, int);
|
||||
typedef void (bio_destructor_t) (struct bio *);
|
||||
|
||||
/*
|
||||
* main unit of I/O for the block layer and lower layers (ie drivers and
|
||||
* stacking drivers)
|
||||
*/
|
||||
struct bio {
|
||||
sector_t bi_sector; /* device address in 512 byte
|
||||
sectors */
|
||||
struct bio *bi_next; /* request queue link */
|
||||
struct block_device *bi_bdev;
|
||||
unsigned long bi_flags; /* status, command, etc */
|
||||
unsigned long bi_rw; /* bottom bits READ/WRITE,
|
||||
* top bits priority
|
||||
*/
|
||||
|
||||
unsigned short bi_vcnt; /* how many bio_vec's */
|
||||
unsigned short bi_idx; /* current index into bvl_vec */
|
||||
|
||||
/* Number of segments in this BIO after
|
||||
* physical address coalescing is performed.
|
||||
*/
|
||||
unsigned int bi_phys_segments;
|
||||
|
||||
unsigned int bi_size; /* residual I/O count */
|
||||
|
||||
/*
|
||||
* To keep track of the max segment size, we account for the
|
||||
* sizes of the first and last mergeable segments in this bio.
|
||||
*/
|
||||
unsigned int bi_seg_front_size;
|
||||
unsigned int bi_seg_back_size;
|
||||
|
||||
unsigned int bi_max_vecs; /* max bvl_vecs we can hold */
|
||||
|
||||
unsigned int bi_comp_cpu; /* completion CPU */
|
||||
|
||||
atomic_t bi_cnt; /* pin count */
|
||||
|
||||
struct bio_vec *bi_io_vec; /* the actual vec list */
|
||||
|
||||
bio_end_io_t *bi_end_io;
|
||||
|
||||
void *bi_private;
|
||||
#if defined(CONFIG_BLK_DEV_INTEGRITY)
|
||||
struct bio_integrity_payload *bi_integrity; /* data integrity */
|
||||
#endif
|
||||
|
||||
bio_destructor_t *bi_destructor; /* destructor */
|
||||
|
||||
/*
|
||||
* We can inline a number of vecs at the end of the bio, to avoid
|
||||
* double allocations for a small number of bio_vecs. This member
|
||||
* MUST obviously be kept at the very end of the bio.
|
||||
*/
|
||||
struct bio_vec bi_inline_vecs[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* bio flags
|
||||
*/
|
||||
#define BIO_UPTODATE 0 /* ok after I/O completion */
|
||||
#define BIO_RW_BLOCK 1 /* RW_AHEAD set, and read/write would block */
|
||||
#define BIO_EOF 2 /* out-out-bounds error */
|
||||
#define BIO_SEG_VALID 3 /* bi_phys_segments valid */
|
||||
#define BIO_CLONED 4 /* doesn't own data */
|
||||
#define BIO_BOUNCED 5 /* bio is a bounce bio */
|
||||
#define BIO_USER_MAPPED 6 /* contains user pages */
|
||||
#define BIO_EOPNOTSUPP 7 /* not supported */
|
||||
#define BIO_CPU_AFFINE 8 /* complete bio on same CPU as submitted */
|
||||
#define BIO_NULL_MAPPED 9 /* contains invalid user pages */
|
||||
#define BIO_FS_INTEGRITY 10 /* fs owns integrity data, not block layer */
|
||||
#define BIO_QUIET 11 /* Make BIO Quiet */
|
||||
#define bio_flagged(bio, flag) ((bio)->bi_flags & (1 << (flag)))
|
||||
|
||||
/*
|
||||
* top 4 bits of bio flags indicate the pool this bio came from
|
||||
*/
|
||||
#define BIO_POOL_BITS (4)
|
||||
#define BIO_POOL_NONE ((1UL << BIO_POOL_BITS) - 1)
|
||||
#define BIO_POOL_OFFSET (BITS_PER_LONG - BIO_POOL_BITS)
|
||||
#define BIO_POOL_MASK (1UL << BIO_POOL_OFFSET)
|
||||
#define BIO_POOL_IDX(bio) ((bio)->bi_flags >> BIO_POOL_OFFSET)
|
||||
|
||||
/*
|
||||
* Request flags. For use in the cmd_flags field of struct request, and in
|
||||
* bi_rw of struct bio. Note that some flags are only valid in either one.
|
||||
*/
|
||||
enum rq_flag_bits {
|
||||
/* common flags */
|
||||
__REQ_WRITE, /* not set, read. set, write */
|
||||
__REQ_FAILFAST_DEV, /* no driver retries of device errors */
|
||||
__REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
|
||||
__REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */
|
||||
|
||||
__REQ_HARDBARRIER, /* may not be passed by drive either */
|
||||
__REQ_SYNC, /* request is sync (sync write or read) */
|
||||
__REQ_META, /* metadata io request */
|
||||
__REQ_DISCARD, /* request to discard sectors */
|
||||
__REQ_NOIDLE, /* don't anticipate more IO after this one */
|
||||
|
||||
/* bio only flags */
|
||||
__REQ_UNPLUG, /* unplug the immediately after submission */
|
||||
__REQ_RAHEAD, /* read ahead, can fail anytime */
|
||||
|
||||
/* request only flags */
|
||||
__REQ_SORTED, /* elevator knows about this request */
|
||||
__REQ_SOFTBARRIER, /* may not be passed by ioscheduler */
|
||||
__REQ_FUA, /* forced unit access */
|
||||
__REQ_NOMERGE, /* don't touch this for merging */
|
||||
__REQ_STARTED, /* drive already may have started this one */
|
||||
__REQ_DONTPREP, /* don't call prep for this one */
|
||||
__REQ_QUEUED, /* uses queueing */
|
||||
__REQ_ELVPRIV, /* elevator private data attached */
|
||||
__REQ_FAILED, /* set if the request failed */
|
||||
__REQ_QUIET, /* don't worry about errors */
|
||||
__REQ_PREEMPT, /* set for "ide_preempt" requests */
|
||||
__REQ_ORDERED_COLOR, /* is before or after barrier */
|
||||
__REQ_ALLOCED, /* request came from our alloc pool */
|
||||
__REQ_COPY_USER, /* contains copies of user pages */
|
||||
__REQ_INTEGRITY, /* integrity metadata has been remapped */
|
||||
__REQ_FLUSH, /* request for cache flush */
|
||||
__REQ_IO_STAT, /* account I/O stat */
|
||||
__REQ_MIXED_MERGE, /* merge of different types, fail separately */
|
||||
__REQ_NR_BITS, /* stops here */
|
||||
};
|
||||
|
||||
#define REQ_WRITE (1 << __REQ_WRITE)
|
||||
#define REQ_FAILFAST_DEV (1 << __REQ_FAILFAST_DEV)
|
||||
#define REQ_FAILFAST_TRANSPORT (1 << __REQ_FAILFAST_TRANSPORT)
|
||||
#define REQ_FAILFAST_DRIVER (1 << __REQ_FAILFAST_DRIVER)
|
||||
#define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER)
|
||||
#define REQ_SYNC (1 << __REQ_SYNC)
|
||||
#define REQ_META (1 << __REQ_META)
|
||||
#define REQ_DISCARD (1 << __REQ_DISCARD)
|
||||
#define REQ_NOIDLE (1 << __REQ_NOIDLE)
|
||||
|
||||
#define REQ_FAILFAST_MASK \
|
||||
(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
|
||||
#define REQ_COMMON_MASK \
|
||||
(REQ_WRITE | REQ_FAILFAST_MASK | REQ_HARDBARRIER | REQ_SYNC | \
|
||||
REQ_META| REQ_DISCARD | REQ_NOIDLE)
|
||||
|
||||
#define REQ_UNPLUG (1 << __REQ_UNPLUG)
|
||||
#define REQ_RAHEAD (1 << __REQ_RAHEAD)
|
||||
|
||||
#define REQ_SORTED (1 << __REQ_SORTED)
|
||||
#define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER)
|
||||
#define REQ_FUA (1 << __REQ_FUA)
|
||||
#define REQ_NOMERGE (1 << __REQ_NOMERGE)
|
||||
#define REQ_STARTED (1 << __REQ_STARTED)
|
||||
#define REQ_DONTPREP (1 << __REQ_DONTPREP)
|
||||
#define REQ_QUEUED (1 << __REQ_QUEUED)
|
||||
#define REQ_ELVPRIV (1 << __REQ_ELVPRIV)
|
||||
#define REQ_FAILED (1 << __REQ_FAILED)
|
||||
#define REQ_QUIET (1 << __REQ_QUIET)
|
||||
#define REQ_PREEMPT (1 << __REQ_PREEMPT)
|
||||
#define REQ_ORDERED_COLOR (1 << __REQ_ORDERED_COLOR)
|
||||
#define REQ_ALLOCED (1 << __REQ_ALLOCED)
|
||||
#define REQ_COPY_USER (1 << __REQ_COPY_USER)
|
||||
#define REQ_INTEGRITY (1 << __REQ_INTEGRITY)
|
||||
#define REQ_FLUSH (1 << __REQ_FLUSH)
|
||||
#define REQ_IO_STAT (1 << __REQ_IO_STAT)
|
||||
#define REQ_MIXED_MERGE (1 << __REQ_MIXED_MERGE)
|
||||
|
||||
/*
|
||||
* upper 16 bits of bi_rw define the io priority of this bio
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,193 @@
|
|||
/*
|
||||
* Block data types and constants. Directly include this file only to
|
||||
* break include dependency loop.
|
||||
*/
|
||||
#ifndef __LINUX_BLK_TYPES_H
|
||||
#define __LINUX_BLK_TYPES_H
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
struct bio_set;
|
||||
struct bio;
|
||||
struct bio_integrity_payload;
|
||||
struct page;
|
||||
struct block_device;
|
||||
typedef void (bio_end_io_t) (struct bio *, int);
|
||||
typedef void (bio_destructor_t) (struct bio *);
|
||||
|
||||
/*
|
||||
* was unsigned short, but we might as well be ready for > 64kB I/O pages
|
||||
*/
|
||||
struct bio_vec {
|
||||
struct page *bv_page;
|
||||
unsigned int bv_len;
|
||||
unsigned int bv_offset;
|
||||
};
|
||||
|
||||
/*
|
||||
* main unit of I/O for the block layer and lower layers (ie drivers and
|
||||
* stacking drivers)
|
||||
*/
|
||||
struct bio {
|
||||
sector_t bi_sector; /* device address in 512 byte
|
||||
sectors */
|
||||
struct bio *bi_next; /* request queue link */
|
||||
struct block_device *bi_bdev;
|
||||
unsigned long bi_flags; /* status, command, etc */
|
||||
unsigned long bi_rw; /* bottom bits READ/WRITE,
|
||||
* top bits priority
|
||||
*/
|
||||
|
||||
unsigned short bi_vcnt; /* how many bio_vec's */
|
||||
unsigned short bi_idx; /* current index into bvl_vec */
|
||||
|
||||
/* Number of segments in this BIO after
|
||||
* physical address coalescing is performed.
|
||||
*/
|
||||
unsigned int bi_phys_segments;
|
||||
|
||||
unsigned int bi_size; /* residual I/O count */
|
||||
|
||||
/*
|
||||
* To keep track of the max segment size, we account for the
|
||||
* sizes of the first and last mergeable segments in this bio.
|
||||
*/
|
||||
unsigned int bi_seg_front_size;
|
||||
unsigned int bi_seg_back_size;
|
||||
|
||||
unsigned int bi_max_vecs; /* max bvl_vecs we can hold */
|
||||
|
||||
unsigned int bi_comp_cpu; /* completion CPU */
|
||||
|
||||
atomic_t bi_cnt; /* pin count */
|
||||
|
||||
struct bio_vec *bi_io_vec; /* the actual vec list */
|
||||
|
||||
bio_end_io_t *bi_end_io;
|
||||
|
||||
void *bi_private;
|
||||
#if defined(CONFIG_BLK_DEV_INTEGRITY)
|
||||
struct bio_integrity_payload *bi_integrity; /* data integrity */
|
||||
#endif
|
||||
|
||||
bio_destructor_t *bi_destructor; /* destructor */
|
||||
|
||||
/*
|
||||
* We can inline a number of vecs at the end of the bio, to avoid
|
||||
* double allocations for a small number of bio_vecs. This member
|
||||
* MUST obviously be kept at the very end of the bio.
|
||||
*/
|
||||
struct bio_vec bi_inline_vecs[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* bio flags
|
||||
*/
|
||||
#define BIO_UPTODATE 0 /* ok after I/O completion */
|
||||
#define BIO_RW_BLOCK 1 /* RW_AHEAD set, and read/write would block */
|
||||
#define BIO_EOF 2 /* out-out-bounds error */
|
||||
#define BIO_SEG_VALID 3 /* bi_phys_segments valid */
|
||||
#define BIO_CLONED 4 /* doesn't own data */
|
||||
#define BIO_BOUNCED 5 /* bio is a bounce bio */
|
||||
#define BIO_USER_MAPPED 6 /* contains user pages */
|
||||
#define BIO_EOPNOTSUPP 7 /* not supported */
|
||||
#define BIO_CPU_AFFINE 8 /* complete bio on same CPU as submitted */
|
||||
#define BIO_NULL_MAPPED 9 /* contains invalid user pages */
|
||||
#define BIO_FS_INTEGRITY 10 /* fs owns integrity data, not block layer */
|
||||
#define BIO_QUIET 11 /* Make BIO Quiet */
|
||||
#define bio_flagged(bio, flag) ((bio)->bi_flags & (1 << (flag)))
|
||||
|
||||
/*
|
||||
* top 4 bits of bio flags indicate the pool this bio came from
|
||||
*/
|
||||
#define BIO_POOL_BITS (4)
|
||||
#define BIO_POOL_NONE ((1UL << BIO_POOL_BITS) - 1)
|
||||
#define BIO_POOL_OFFSET (BITS_PER_LONG - BIO_POOL_BITS)
|
||||
#define BIO_POOL_MASK (1UL << BIO_POOL_OFFSET)
|
||||
#define BIO_POOL_IDX(bio) ((bio)->bi_flags >> BIO_POOL_OFFSET)
|
||||
|
||||
/*
|
||||
* Request flags. For use in the cmd_flags field of struct request, and in
|
||||
* bi_rw of struct bio. Note that some flags are only valid in either one.
|
||||
*/
|
||||
enum rq_flag_bits {
|
||||
/* common flags */
|
||||
__REQ_WRITE, /* not set, read. set, write */
|
||||
__REQ_FAILFAST_DEV, /* no driver retries of device errors */
|
||||
__REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
|
||||
__REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */
|
||||
|
||||
__REQ_HARDBARRIER, /* may not be passed by drive either */
|
||||
__REQ_SYNC, /* request is sync (sync write or read) */
|
||||
__REQ_META, /* metadata io request */
|
||||
__REQ_DISCARD, /* request to discard sectors */
|
||||
__REQ_NOIDLE, /* don't anticipate more IO after this one */
|
||||
|
||||
/* bio only flags */
|
||||
__REQ_UNPLUG, /* unplug the immediately after submission */
|
||||
__REQ_RAHEAD, /* read ahead, can fail anytime */
|
||||
|
||||
/* request only flags */
|
||||
__REQ_SORTED, /* elevator knows about this request */
|
||||
__REQ_SOFTBARRIER, /* may not be passed by ioscheduler */
|
||||
__REQ_FUA, /* forced unit access */
|
||||
__REQ_NOMERGE, /* don't touch this for merging */
|
||||
__REQ_STARTED, /* drive already may have started this one */
|
||||
__REQ_DONTPREP, /* don't call prep for this one */
|
||||
__REQ_QUEUED, /* uses queueing */
|
||||
__REQ_ELVPRIV, /* elevator private data attached */
|
||||
__REQ_FAILED, /* set if the request failed */
|
||||
__REQ_QUIET, /* don't worry about errors */
|
||||
__REQ_PREEMPT, /* set for "ide_preempt" requests */
|
||||
__REQ_ORDERED_COLOR, /* is before or after barrier */
|
||||
__REQ_ALLOCED, /* request came from our alloc pool */
|
||||
__REQ_COPY_USER, /* contains copies of user pages */
|
||||
__REQ_INTEGRITY, /* integrity metadata has been remapped */
|
||||
__REQ_FLUSH, /* request for cache flush */
|
||||
__REQ_IO_STAT, /* account I/O stat */
|
||||
__REQ_MIXED_MERGE, /* merge of different types, fail separately */
|
||||
__REQ_NR_BITS, /* stops here */
|
||||
};
|
||||
|
||||
#define REQ_WRITE (1 << __REQ_WRITE)
|
||||
#define REQ_FAILFAST_DEV (1 << __REQ_FAILFAST_DEV)
|
||||
#define REQ_FAILFAST_TRANSPORT (1 << __REQ_FAILFAST_TRANSPORT)
|
||||
#define REQ_FAILFAST_DRIVER (1 << __REQ_FAILFAST_DRIVER)
|
||||
#define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER)
|
||||
#define REQ_SYNC (1 << __REQ_SYNC)
|
||||
#define REQ_META (1 << __REQ_META)
|
||||
#define REQ_DISCARD (1 << __REQ_DISCARD)
|
||||
#define REQ_NOIDLE (1 << __REQ_NOIDLE)
|
||||
|
||||
#define REQ_FAILFAST_MASK \
|
||||
(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
|
||||
#define REQ_COMMON_MASK \
|
||||
(REQ_WRITE | REQ_FAILFAST_MASK | REQ_HARDBARRIER | REQ_SYNC | \
|
||||
REQ_META| REQ_DISCARD | REQ_NOIDLE)
|
||||
|
||||
#define REQ_UNPLUG (1 << __REQ_UNPLUG)
|
||||
#define REQ_RAHEAD (1 << __REQ_RAHEAD)
|
||||
|
||||
#define REQ_SORTED (1 << __REQ_SORTED)
|
||||
#define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER)
|
||||
#define REQ_FUA (1 << __REQ_FUA)
|
||||
#define REQ_NOMERGE (1 << __REQ_NOMERGE)
|
||||
#define REQ_STARTED (1 << __REQ_STARTED)
|
||||
#define REQ_DONTPREP (1 << __REQ_DONTPREP)
|
||||
#define REQ_QUEUED (1 << __REQ_QUEUED)
|
||||
#define REQ_ELVPRIV (1 << __REQ_ELVPRIV)
|
||||
#define REQ_FAILED (1 << __REQ_FAILED)
|
||||
#define REQ_QUIET (1 << __REQ_QUIET)
|
||||
#define REQ_PREEMPT (1 << __REQ_PREEMPT)
|
||||
#define REQ_ORDERED_COLOR (1 << __REQ_ORDERED_COLOR)
|
||||
#define REQ_ALLOCED (1 << __REQ_ALLOCED)
|
||||
#define REQ_COPY_USER (1 << __REQ_COPY_USER)
|
||||
#define REQ_INTEGRITY (1 << __REQ_INTEGRITY)
|
||||
#define REQ_FLUSH (1 << __REQ_FLUSH)
|
||||
#define REQ_IO_STAT (1 << __REQ_IO_STAT)
|
||||
#define REQ_MIXED_MERGE (1 << __REQ_MIXED_MERGE)
|
||||
|
||||
#endif /* CONFIG_BLOCK */
|
||||
#endif /* __LINUX_BLK_TYPES_H */
|
||||
|
|
@ -8,6 +8,7 @@
|
|||
|
||||
#include <linux/limits.h>
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/blk_types.h>
|
||||
|
||||
/*
|
||||
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
|
||||
|
|
@ -117,7 +118,7 @@ struct inodes_stat_t {
|
|||
* immediately wait on this read without caring about
|
||||
* unplugging.
|
||||
* READA Used for read-ahead operations. Lower priority, and the
|
||||
* block layer could (in theory) choose to ignore this
|
||||
* block layer could (in theory) choose to ignore this
|
||||
* request if it runs into resource problems.
|
||||
* WRITE A normal async write. Device will be plugged.
|
||||
* SWRITE Like WRITE, but a special case for ll_rw_block() that
|
||||
|
|
@ -144,13 +145,13 @@ struct inodes_stat_t {
|
|||
* of this IO.
|
||||
*
|
||||
*/
|
||||
#define RW_MASK 1
|
||||
#define RWA_MASK 16
|
||||
#define RW_MASK REQ_WRITE
|
||||
#define RWA_MASK REQ_RAHEAD
|
||||
|
||||
#define READ 0
|
||||
#define WRITE 1
|
||||
#define READA 16 /* readahead - don't block if no resources */
|
||||
#define SWRITE 17 /* for ll_rw_block(), wait for buffer lock */
|
||||
#define WRITE RW_MASK
|
||||
#define READA RWA_MASK
|
||||
#define SWRITE (WRITE | READA)
|
||||
|
||||
#define READ_SYNC (READ | REQ_SYNC | REQ_UNPLUG)
|
||||
#define READ_META (READ | REQ_META)
|
||||
|
|
@ -2200,7 +2201,6 @@ static inline void insert_inode_hash(struct inode *inode) {
|
|||
extern void file_move(struct file *f, struct list_head *list);
|
||||
extern void file_kill(struct file *f);
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct bio;
|
||||
extern void submit_bio(int, struct bio *);
|
||||
extern int bdev_read_only(struct block_device *);
|
||||
#endif
|
||||
|
|
@ -2267,7 +2267,6 @@ static inline int xip_truncate_page(struct address_space *mapping, loff_t from)
|
|||
#endif
|
||||
|
||||
#ifdef CONFIG_BLOCK
|
||||
struct bio;
|
||||
typedef void (dio_submit_t)(int rw, struct bio *bio, struct inode *inode,
|
||||
loff_t file_offset);
|
||||
void dio_end_io(struct bio *bio, int error);
|
||||
|
|
|
|||
Loading…
Reference in New Issue