Martin Peschke f32c9e03d4 scsi: zfcp: early returns for traces disabled via level ... This patch adds early checks to avoid burning CPU cycles on the assembly of trace entries which would be skipped anyway. Introduce a static const variable to keep the trace level to check with debug_level_enabled() in sync with the actual trace emit with debug_event(). In order not to refactor the SAN tracing too much, simply use a define instead. This change is only for the non / semi hot paths, while the actual (I/O) hot path was already improved earlier: zfcp_dbf_scsi() is already guarded by its only caller _zfcp_dbf_scsi() since commit dcd20e2316 ("[SCSI] zfcp: Only collect SCSI debug data for matching trace levels"). zfcp_dbf_hba_fsf_res() is already guarded by its only caller zfcp_dbf_hba_fsf_response() since commit 2e261af84c ("[SCSI] zfcp: Only collect FSF/HBA debug data for matching trace levels"). Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com> [maier@linux.vnet.ibm.com: rebase, reword, default level 3 branch prediction] Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2017-08-10 19:37:03 -04:00
..
Makefile	[SCSI] zfcp: remove access control tables interface	2013-05-31 16:32:38 -07:00
zfcp_aux.c	scsi: zfcp: Remove unneeded linux/miscdevice.h include	2017-08-10 19:36:53 -04:00
zfcp_ccw.c	zfcp: auto port scan resiliency	2014-11-20 09:11:30 +01:00
zfcp_dbf.c	scsi: zfcp: early returns for traces disabled via level	2017-08-10 19:37:03 -04:00
zfcp_dbf.h	scsi: zfcp: fix kernel doc comment typos for struct zfcp_dbf_scsi	2017-08-10 19:37:01 -04:00
zfcp_def.h	zfcp: auto port scan resiliency	2014-11-20 09:11:30 +01:00
zfcp_erp.c	scsi: zfcp: use setup_timer instead of init_timer	2017-08-10 19:36:53 -04:00
zfcp_ext.h	scsi: zfcp: clean up no longer existent prototype from zfcp API header	2017-08-10 19:37:02 -04:00
zfcp_fc.c	scsi: zfcp: clean up unnecessary module_param_named() with no_auto_port_rescan	2017-08-10 19:37:03 -04:00
zfcp_fc.h	scsi: zfcp: use endianness conversions with common FC(P) struct fields	2017-08-10 19:37:00 -04:00
zfcp_fsf.c	scsi: zfcp: clean up a member of struct zfcp_qdio that was assigned but never used	2017-08-10 19:37:02 -04:00
zfcp_fsf.h	scsi: zfcp: use common code fcp_cmnd and fcp_resp with union in fsf_qtcb_bottom_io	2017-08-10 19:37:00 -04:00
zfcp_qdio.c	scsi: zfcp: convert bool-definitions to use 'true' instead of '1'	2017-08-10 19:36:54 -04:00
zfcp_qdio.h	scsi: zfcp: clean up a member of struct zfcp_qdio that was assigned but never used	2017-08-10 19:37:02 -04:00
zfcp_reqlist.h	scsi: zfcp: fix use-after-"free" in FC ingress path after TMF	2016-12-14 15:14:04 -05:00
zfcp_scsi.c	scsi: zfcp: fix missing trace records for early returns in TMF eh handlers	2017-08-10 19:36:56 -04:00
zfcp_sysfs.c	zfcp: auto port scan resiliency	2014-11-20 09:11:30 +01:00
zfcp_unit.c	zfcp: Revert to original scanning behaviour	2016-04-15 16:53:12 -04:00