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[SCSI] libsas: trim sas_task of slow path infrastructure

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The timer and the completion are only used for slow path tasks (smp, and
lldd tmfs), yet we incur the allocation space and cpu setup time for
every fast path task.

Cc: Xiangliang Yu <yuxiangl@marvell.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams
2012-06-21 23:36:30 -07:00
committed by James Bottomley
parent a494fd5bd9
commit f0bf750c2d
6 changed files with 73 additions and 46 deletions
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14
include/scsi/libsas.h
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@@ -613,10 +613,6 @@ struct sas_task {
enum sas_protocol task_proto;
/* Used by the discovery code. */
struct timer_list timer;
struct completion completion;
union {
struct sas_ata_task ata_task;
struct sas_smp_task smp_task;
@@ -633,8 +629,15 @@ struct sas_task {
void *lldd_task; /* for use by LLDDs */
void *uldd_task;
struct sas_task_slow *slow_task;
};
struct work_struct abort_work;
struct sas_task_slow {
/* standard/extra infrastructure for slow path commands (SMP and
* internal lldd commands
*/
struct timer_list timer;
struct completion completion;
};
#define SAS_TASK_STATE_PENDING 1
@@ -644,6 +647,7 @@ struct sas_task {
#define SAS_TASK_AT_INITIATOR 16
extern struct sas_task *sas_alloc_task(gfp_t flags);
extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
extern void sas_free_task(struct sas_task *task);
struct sas_domain_function_template {