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authorFinn Thain <fthain@telegraphics.com.au>2016-10-10 07:46:53 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2016-11-09 01:29:48 +0300
commit25894d1f98aed363bf03e2509d0237c69ab0c8ec (patch)
tree793082497d7ce41de12e345bf8c25fa37bc3ae9f /drivers/scsi/NCR5380.h
parent4822827a69d7cd3bc5a07b7637484ebd2cf88db6 (diff)
downloadlinux-25894d1f98aed363bf03e2509d0237c69ab0c8ec.tar.xz
scsi: ncr5380: Improve hostdata struct member alignment and cache-ability
Re-order struct members so that hot data lies at the beginning of the struct and cold data at the end. Improve the comments while we're here. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.h')
-rw-r--r--drivers/scsi/NCR5380.h40
1 files changed, 20 insertions, 20 deletions
diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h
index f0eea44107d2..ceafa0cd80be 100644
--- a/drivers/scsi/NCR5380.h
+++ b/drivers/scsi/NCR5380.h
@@ -219,27 +219,27 @@
#define FLAG_TOSHIBA_DELAY 128 /* Allow for borken CD-ROMs */
struct NCR5380_hostdata {
- NCR5380_implementation_fields; /* implementation specific */
- struct Scsi_Host *host; /* Host backpointer */
- unsigned char id_mask, id_higher_mask; /* 1 << id, all bits greater */
- unsigned char busy[8]; /* index = target, bit = lun */
- int dma_len; /* requested length of DMA */
- unsigned char last_message; /* last message OUT */
- struct scsi_cmnd *connected; /* currently connected cmnd */
- struct scsi_cmnd *selecting; /* cmnd to be connected */
- struct list_head unissued; /* waiting to be issued */
- struct list_head autosense; /* priority issue queue */
- struct list_head disconnected; /* waiting for reconnect */
- spinlock_t lock; /* protects this struct */
- int flags;
- struct scsi_eh_save ses;
- struct scsi_cmnd *sensing;
+ NCR5380_implementation_fields; /* Board-specific data */
+ unsigned long poll_loops; /* Register polling limit */
+ spinlock_t lock; /* Protects this struct */
+ struct scsi_cmnd *connected; /* Currently connected cmnd */
+ struct list_head disconnected; /* Waiting for reconnect */
+ struct Scsi_Host *host; /* SCSI host backpointer */
+ struct workqueue_struct *work_q; /* SCSI host work queue */
+ struct work_struct main_task; /* Work item for main loop */
+ int flags; /* Board-specific quirks */
+ int dma_len; /* Requested length of DMA */
+ int read_overruns; /* Transfer size reduction for DMA erratum */
+ struct list_head unissued; /* Waiting to be issued */
+ struct scsi_cmnd *selecting; /* Cmnd to be connected */
+ struct list_head autosense; /* Priority cmnd queue */
+ struct scsi_cmnd *sensing; /* Cmnd needing autosense */
+ struct scsi_eh_save ses; /* Cmnd state saved for EH */
+ unsigned char busy[8]; /* Index = target, bit = lun */
+ unsigned char id_mask; /* 1 << Host ID */
+ unsigned char id_higher_mask; /* All bits above id_mask */
+ unsigned char last_message; /* Last Message Out */
char info[256];
- int read_overruns; /* number of bytes to cut from a
- * transfer to handle chip overruns */
- struct work_struct main_task;
- struct workqueue_struct *work_q;
- unsigned long poll_loops; /* register polling limit */
};
#ifdef __KERNEL__