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scsi: ufs: core: Reduce the size of struct ufshcd_lrb 

The size of the data structures that are used in the hot path matters
for performance (IOPS). Hence this patch that reduces the size of struct
ufshcd_lrb on 64-bit systems by 16 bytes. The size of this data
structure is reduced from 152 to 136 bytes.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20250819154356.2256952-1-bvanassche@acm.org
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2025-08-19 08:43:49 -07:00 committed by Martin K. Petersen
parent cb7cc0cfb3
commit b5940feda3
1 changed files with 2 additions and 3 deletions
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5
include/ufs/ufshcd.h
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@ -167,13 +167,13 @@ struct ufs_pm_lvl_states {
* @task_tag: Task tag of the command
* @lun: LUN of the command
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
* @req_abort_skip: skip request abort task flag
* @issue_time_stamp: time stamp for debug purposes (CLOCK_MONOTONIC)
* @issue_time_stamp_local_clock: time stamp for debug purposes (local_clock)
* @compl_time_stamp: time stamp for statistics (CLOCK_MONOTONIC)
* @compl_time_stamp_local_clock: time stamp for debug purposes (local_clock)
* @crypto_key_slot: the key slot to use for inline crypto (-1 if none)
* @data_unit_num: the data unit number for the first block for inline crypto
* @req_abort_skip: skip request abort task flag
*/
struct ufshcd_lrb {
struct utp_transfer_req_desc *utr_descriptor_ptr;
@ -193,6 +193,7 @@ struct ufshcd_lrb {
int task_tag;
u8 lun; /* UPIU LUN id field is only 8-bit wide */
bool intr_cmd;
bool req_abort_skip;
ktime_t issue_time_stamp;
u64 issue_time_stamp_local_clock;
ktime_t compl_time_stamp;
@ -201,8 +202,6 @@ struct ufshcd_lrb {
int crypto_key_slot;
u64 data_unit_num;
#endif
bool req_abort_skip;
};
/**