From 9704154fa0b20fe76e7a46c902adce88da1a75d6 Mon Sep 17 00:00:00 2001 From: Steffen Maier Date: Thu, 8 Nov 2018 15:44:46 +0100 Subject: scsi: zfcp: drop duplicate seq_no from zfcp_fsf_req which is also in QTCB header There is no point for double bookkeeping especially just for tracing. The trace can take it from the QTCB which always exists for non-SRB responses traced with zfcp_dbf_hba_fsf_res(). As a side effect, this removes an alignment hole and reduces the size of struct zfcp_fsf_req, and thus of each pending request, by 8 bytes. Before: $ pahole -C zfcp_fsf_req drivers/s390/scsi/zfcp.ko ... struct fsf_qtcb * qtcb; /* 144 8 */ u32 seq_no; /* 152 4 */ /* XXX 4 bytes hole, try to pack */ void * data; /* 160 8 */ ... /* size: 296, cachelines: 2, members: 14 */ /* sum members: 288, holes: 2, sum holes: 8 */ /* last cacheline: 40 bytes */ After: $ pahole -C zfcp_fsf_req drivers/s390/scsi/zfcp.ko ... struct fsf_qtcb * qtcb; /* 144 8 */ void * data; /* 152 8 */ ... /* size: 288, cachelines: 2, members: 13 */ /* sum members: 284, holes: 1, sum holes: 4 */ Signed-off-by: Steffen Maier Reviewed-by: Benjamin Block Signed-off-by: Martin K. Petersen --- drivers/s390/scsi/zfcp_dbf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/s390/scsi/zfcp_dbf.c') diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index d20977bb27a4..3503de873963 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -82,7 +82,7 @@ void zfcp_dbf_hba_fsf_res(char *tag, int level, struct zfcp_fsf_req *req) rec->fsf_req_id = req->req_id; rec->fsf_req_status = req->status; rec->fsf_cmd = q_head->fsf_command; - rec->fsf_seq_no = req->seq_no; + rec->fsf_seq_no = q_pref->req_seq_no; rec->u.res.req_issued = req->issued; rec->u.res.prot_status = q_pref->prot_status; rec->u.res.fsf_status = q_head->fsf_status; -- cgit v1.2.3