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s390/dasd: reshuffle struct dasd_ccw_req 

Move some members of struct dasd_ccw_req to get rid of padding
bytes. This saves 16 bytes per dasd request.

Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2018-06-04 19:39:38 +02:00 committed by Martin Schwidefsky
parent d8a72d414b
commit 61d3883210
1 changed files with 3 additions and 11 deletions
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14
drivers/s390/block/dasd_int.h
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@ -158,41 +158,33 @@ do { \
struct dasd_ccw_req {
unsigned int magic; /* Eye catcher */
int intrc; /* internal error, e.g. from start_IO */
struct list_head devlist; /* for dasd_device request queue */
struct list_head blocklist; /* for dasd_block request queue */
/* Where to execute what... */
struct dasd_block *block; /* the originating block device */
struct dasd_device *memdev; /* the device used to allocate this */
struct dasd_device *startdev; /* device the request is started on */
struct dasd_device *basedev; /* base device if no block->base */
void *cpaddr; /* address of ccw or tcw */
short retries; /* A retry counter */
unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
char status; /* status of this request */
short retries; /* A retry counter */
char lpm; /* logical path mask */
unsigned long flags; /* flags of this request */
struct dasd_queue *dq;
/* ... and how */
unsigned long starttime; /* jiffies time of request start */
unsigned long expires; /* expiration period in jiffies */
char lpm; /* logical path mask */
void *data; /* pointer to data area */
/* these are important for recovering erroneous requests */
int intrc; /* internal error, e.g. from start_IO */
struct irb irb; /* device status in case of an error */
struct dasd_ccw_req *refers; /* ERP-chain queueing. */
void *function; /* originating ERP action */
void *mem_chunk;
/* these are for statistics only */
unsigned long buildclk; /* TOD-clock of request generation */
unsigned long startclk; /* TOD-clock of request start */
unsigned long stopclk; /* TOD-clock of request interrupt */
unsigned long endclk; /* TOD-clock of request termination */
/* Callback that is called after reaching final status. */
void (*callback)(struct dasd_ccw_req *, void *data);
void *callback_data;
};