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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  libata: implement drain buffers
  libata: eliminate the home grown dma padding in favour of
  block: clear drain buffer if draining for write command
  block: implement request_queue->dma_drain_needed
  block: add request->raw_data_len
  block: update bio according to DMA alignment padding
  libata: update ATAPI overflow draining
  elevator: make elevator_get() attempt to load the appropriate module
  cfq-iosched: add hlist for browsing parallel to the radix tree
  block: make blk_rq_map_user() clear ->bio if it unmaps it
  fs/block_dev.c: remove #if 0'ed code
  make struct def_blk_aops static
  make blk_settings_init() static
  make blk_ioc_init() static
  make blk-core.c:request_cachep static again
This commit is contained in:
Linus Torvalds 2008-02-19 08:03:02 -08:00
commit f6c427663a
27 changed files with 191 additions and 567 deletions
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1
include/linux/aio.h
View file

@ -105,7 +105,6 @@ struct kiocb {
wait_queue_t ki_wait;
loff_t ki_pos;
atomic_t ki_bio_count; /* num bio used for this iocb */
void *private;
/* State that we remember to be able to restart/retry */
unsigned short ki_opcode;

1
include/linux/bio.h
View file

@ -326,7 +326,6 @@ extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
gfp_t);
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
extern void bio_release_pages(struct bio *bio);
extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int);
extern int bio_uncopy_user(struct bio *);
void zero_fill_bio(struct bio *bio);

8
include/linux/blkdev.h
View file

@ -216,6 +216,7 @@ struct request {
unsigned int cmd_len;
unsigned char cmd[BLK_MAX_CDB];
unsigned int raw_data_len;
unsigned int data_len;
unsigned int sense_len;
void *data;
@ -258,6 +259,7 @@ struct bio_vec;
typedef int (merge_bvec_fn) (struct request_queue *, struct bio *, struct bio_vec *);
typedef void (prepare_flush_fn) (struct request_queue *, struct request *);
typedef void (softirq_done_fn)(struct request *);
typedef int (dma_drain_needed_fn)(struct request *);
enum blk_queue_state {
Queue_down,
@ -294,6 +296,7 @@ struct request_queue
merge_bvec_fn *merge_bvec_fn;
prepare_flush_fn *prepare_flush_fn;
softirq_done_fn *softirq_done_fn;
dma_drain_needed_fn *dma_drain_needed;
/*
* Dispatch queue sorting
@ -698,8 +701,9 @@ extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
extern void blk_queue_hardsect_size(struct request_queue *, unsigned short);
extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
extern int blk_queue_dma_drain(struct request_queue *q, void *buf,
unsigned int size);
extern int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size);
extern void blk_queue_segment_boundary(struct request_queue *, unsigned long);
extern void blk_queue_prep_rq(struct request_queue *, prep_rq_fn *pfn);
extern void blk_queue_merge_bvec(struct request_queue *, merge_bvec_fn *);

1
include/linux/fs.h
View file

@ -1590,7 +1590,6 @@ extern void bd_set_size(struct block_device *, loff_t size);
extern void bd_forget(struct inode *inode);
extern void bdput(struct block_device *);
extern struct block_device *open_by_devnum(dev_t, unsigned);
extern const struct address_space_operations def_blk_aops;
#else
static inline void bd_forget(struct inode *inode) {}
#endif

2
include/linux/iocontext.h
View file

@ -50,6 +50,7 @@ struct cfq_io_context {
sector_t seek_mean;
struct list_head queue_list;
struct hlist_node cic_list;
void (*dtor)(struct io_context *); /* destructor */
void (*exit)(struct io_context *); /* called on task exit */
@ -77,6 +78,7 @@ struct io_context {
struct as_io_context *aic;
struct radix_tree_root radix_root;
struct hlist_head cic_list;
void *ioc_data;
};

28
include/linux/libata.h
View file

@ -278,7 +278,6 @@ enum {
/* size of buffer to pad xfers ending on unaligned boundaries */
ATA_DMA_PAD_SZ = 4,
ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
/* ering size */
ATA_ERING_SIZE = 32,
@ -457,24 +456,18 @@ struct ata_queued_cmd {
unsigned long flags; /* ATA_QCFLAG_xxx */
unsigned int tag;
unsigned int n_elem;
unsigned int mapped_n_elem;
int dma_dir;
unsigned int pad_len;
unsigned int sect_size;
unsigned int nbytes;
unsigned int raw_nbytes;
unsigned int curbytes;
struct scatterlist *cursg;
unsigned int cursg_ofs;
struct scatterlist *last_sg;
struct scatterlist saved_last_sg;
struct scatterlist sgent;
struct scatterlist extra_sg[2];
struct scatterlist *sg;
@ -619,9 +612,6 @@ struct ata_port {
struct ata_prd *prd; /* our SG list */
dma_addr_t prd_dma; /* and its DMA mapping */
void *pad; /* array of DMA pad buffers */
dma_addr_t pad_dma;
struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
u8 ctl; /* cache of ATA control register */
@ -1363,12 +1353,9 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
qc->flags = 0;
qc->cursg = NULL;
qc->cursg_ofs = 0;
qc->nbytes = qc->raw_nbytes = qc->curbytes = 0;
qc->nbytes = qc->curbytes = 0;
qc->n_elem = 0;
qc->mapped_n_elem = 0;
qc->err_mask = 0;
qc->pad_len = 0;
qc->last_sg = NULL;
qc->sect_size = ATA_SECT_SIZE;
ata_tf_init(qc->dev, &qc->tf);
@ -1423,19 +1410,6 @@ static inline unsigned int __ac_err_mask(u8 status)
return mask;
}
static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
{
ap->pad_dma = 0;
ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
&ap->pad_dma, GFP_KERNEL);
return (ap->pad == NULL) ? -ENOMEM : 0;
}
static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
{
dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
}
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
{
return *(struct ata_port **)&host->hostdata[0];