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scsi: rename SG related struct and functions 

Rename SCSI specific struct and functions to more genenic names.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Reviewed-by: Sagi Grimberg <sgi@grimberg.me>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lin 2016-04-04 14:48:09 -07:00 committed by Martin K. Petersen
parent 22cc3d4c6f
commit 001d63be61
1 changed files with 26 additions and 26 deletions
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52
drivers/scsi/scsi_lib.c
View File

@ -40,10 +40,10 @@
#include "scsi_logging.h"
#define SG_MEMPOOL_NR ARRAY_SIZE(scsi_sg_pools)
#define SG_MEMPOOL_NR ARRAY_SIZE(sg_pools)
#define SG_MEMPOOL_SIZE 2
struct scsi_host_sg_pool {
struct sg_pool {
size_t size;
char *name;
struct kmem_cache *slab;
@ -54,7 +54,7 @@ struct scsi_host_sg_pool {
#if (SCSI_MAX_SG_SEGMENTS < 32)
#error SCSI_MAX_SG_SEGMENTS is too small (must be 32 or greater)
#endif
static struct scsi_host_sg_pool scsi_sg_pools[] = {
static struct sg_pool sg_pools[] = {
SP(8),
SP(16),
#if (SCSI_MAX_SG_SEGMENTS > 32)
@ -553,7 +553,7 @@ void scsi_run_host_queues(struct Scsi_Host *shost)
scsi_run_queue(sdev->request_queue);
}
static inline unsigned int scsi_sgtable_index(unsigned short nents)
static inline unsigned int sg_pool_index(unsigned short nents)
{
unsigned int index;
@ -567,30 +567,30 @@ static inline unsigned int scsi_sgtable_index(unsigned short nents)
return index;
}
static void scsi_sg_free(struct scatterlist *sgl, unsigned int nents)
static void sg_pool_free(struct scatterlist *sgl, unsigned int nents)
{
struct scsi_host_sg_pool *sgp;
struct sg_pool *sgp;
sgp = scsi_sg_pools + scsi_sgtable_index(nents);
sgp = sg_pools + sg_pool_index(nents);
mempool_free(sgl, sgp->pool);
}
static struct scatterlist *scsi_sg_alloc(unsigned int nents, gfp_t gfp_mask)
static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask)
{
struct scsi_host_sg_pool *sgp;
struct sg_pool *sgp;
sgp = scsi_sg_pools + scsi_sgtable_index(nents);
sgp = sg_pools + sg_pool_index(nents);
return mempool_alloc(sgp->pool, gfp_mask);
}
static void scsi_free_sgtable(struct sg_table *table, bool first_chunk)
static void sg_free_table_chained(struct sg_table *table, bool first_chunk)
{
if (first_chunk && table->orig_nents <= SCSI_MAX_SG_SEGMENTS)
return;
__sg_free_table(table, SCSI_MAX_SG_SEGMENTS, first_chunk, scsi_sg_free);
__sg_free_table(table, SCSI_MAX_SG_SEGMENTS, first_chunk, sg_pool_free);
}
static int scsi_alloc_sgtable(struct sg_table *table, int nents,
static int sg_alloc_table_chained(struct sg_table *table, int nents,
struct scatterlist *first_chunk)
{
int ret;
@ -606,9 +606,9 @@ static int scsi_alloc_sgtable(struct sg_table *table, int nents,
}
ret = __sg_alloc_table(table, nents, SCSI_MAX_SG_SEGMENTS,
first_chunk, GFP_ATOMIC, scsi_sg_alloc);
first_chunk, GFP_ATOMIC, sg_pool_alloc);
if (unlikely(ret))
scsi_free_sgtable(table, (bool)first_chunk);
sg_free_table_chained(table, (bool)first_chunk);
return ret;
}
@ -627,14 +627,14 @@ static void scsi_mq_free_sgtables(struct scsi_cmnd *cmd)
struct scsi_data_buffer *sdb;
if (cmd->sdb.table.nents)
scsi_free_sgtable(&cmd->sdb.table, true);
sg_free_table_chained(&cmd->sdb.table, true);
if (cmd->request->next_rq) {
sdb = cmd->request->next_rq->special;
if (sdb)
scsi_free_sgtable(&sdb->table, true);
sg_free_table_chained(&sdb->table, true);
}
if (scsi_prot_sg_count(cmd))
scsi_free_sgtable(&cmd->prot_sdb->table, true);
sg_free_table_chained(&cmd->prot_sdb->table, true);
}
static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd)
@ -673,19 +673,19 @@ static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd)
static void scsi_release_buffers(struct scsi_cmnd *cmd)
{
if (cmd->sdb.table.nents)
scsi_free_sgtable(&cmd->sdb.table, false);
sg_free_table_chained(&cmd->sdb.table, false);
memset(&cmd->sdb, 0, sizeof(cmd->sdb));
if (scsi_prot_sg_count(cmd))
scsi_free_sgtable(&cmd->prot_sdb->table, false);
sg_free_table_chained(&cmd->prot_sdb->table, false);
}
static void scsi_release_bidi_buffers(struct scsi_cmnd *cmd)
{
struct scsi_data_buffer *bidi_sdb = cmd->request->next_rq->special;
scsi_free_sgtable(&bidi_sdb->table, false);
sg_free_table_chained(&bidi_sdb->table, false);
kmem_cache_free(scsi_sdb_cache, bidi_sdb);
cmd->request->next_rq->special = NULL;
}
@ -1089,7 +1089,7 @@ static int scsi_init_sgtable(struct request *req, struct scsi_data_buffer *sdb)
/*
* If sg table allocation fails, requeue request later.
*/
if (unlikely(scsi_alloc_sgtable(&sdb->table, req->nr_phys_segments,
if (unlikely(sg_alloc_table_chained(&sdb->table, req->nr_phys_segments,
sdb->table.sgl)))
return BLKPREP_DEFER;
@ -1162,7 +1162,7 @@ int scsi_init_io(struct scsi_cmnd *cmd)
ivecs = blk_rq_count_integrity_sg(rq->q, rq->bio);
if (scsi_alloc_sgtable(&prot_sdb->table, ivecs,
if (sg_alloc_table_chained(&prot_sdb->table, ivecs,
prot_sdb->table.sgl)) {
error = BLKPREP_DEFER;
goto err_exit;
@ -2280,7 +2280,7 @@ int __init scsi_init_queue(void)
}
for (i = 0; i < SG_MEMPOOL_NR; i++) {
struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
struct sg_pool *sgp = sg_pools + i;
int size = sgp->size * sizeof(struct scatterlist);
sgp->slab = kmem_cache_create(sgp->name, size, 0,
@ -2304,7 +2304,7 @@ int __init scsi_init_queue(void)
cleanup_sdb:
for (i = 0; i < SG_MEMPOOL_NR; i++) {
struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
struct sg_pool *sgp = sg_pools + i;
if (sgp->pool)
mempool_destroy(sgp->pool);
if (sgp->slab)
@ -2322,7 +2322,7 @@ void scsi_exit_queue(void)
kmem_cache_destroy(scsi_sdb_cache);
for (i = 0; i < SG_MEMPOOL_NR; i++) {
struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
struct sg_pool *sgp = sg_pools + i;
mempool_destroy(sgp->pool);
kmem_cache_destroy(sgp->slab);
}