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Jeff Garzik f281233d3e SCSI host lock push-down 
Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2010-11-16 13:33:23 -08:00
..
fc [SCSI] libfcoe: add protocol description of FIP VN2VN mode 2010-07-28 09:05:55 -05:00
Kbuild [SCSI] Unexport scsi/scsi.h from headers_install 2010-05-02 11:45:12 -04:00
fc_encode.h [SCSI] libfc: add fc_fill_reply_hdr() and fc_fill_hdr() 2010-07-28 09:06:00 -05:00
fc_frame.h [SCSI] libfc: add fc_frame_sid() and fc_frame_did() functions 2010-07-28 09:05:59 -05:00
iscsi_if.h [SCSI] iscsi_transport: added new iscsi_param to display target alias in sysfs 2010-07-28 09:05:25 -05:00
iscsi_proto.h [SCSI] libiscsi: Check TMF state before sending PDU 2009-12-04 12:01:36 -06:00
libfc.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
libfcoe.h [SCSI] libfcoe: fcoe: fnic: add FIP VN2VN point-to-multipoint support 2010-07-28 09:05:56 -05:00
libiscsi.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
libiscsi_tcp.h kfifo: move struct kfifo in place 2009-12-22 14:17:55 -08:00
libsas.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
libsrp.h libsrp: fix compile failure 2009-12-30 12:23:27 -08:00
osd_attributes.h [SCSI] libosd: OSD2r05: Attribute definitions 2009-06-10 08:54:07 -05:00
osd_initiator.h [SCSI] libosd: write/read_sg_kern API 2010-10-26 10:42:35 -05:00
osd_protocol.h [SCSI] libosd: Support for scatter gather write/read commands 2010-10-26 10:42:34 -05:00
osd_sec.h [SCSI] libosd: OSDv1 Headers 2009-03-12 12:58:06 -05:00
osd_sense.h [SCSI] libosd: osd_sense: OSD_CFO_PERMISSIONS 2009-12-04 12:01:44 -06:00
osd_types.h [SCSI] libosd: Support for scatter gather write/read commands 2010-10-26 10:42:34 -05:00
sas.h [SCSI] libsas: Convert sas_proto users to sas_protocol 2008-01-11 18:22:41 -06:00
sas_ata.h [SCSI] libsas: fix missing inlines in header file 2008-04-07 12:19:10 -05:00
scsi.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2010-10-22 20:30:48 -07:00
scsi_bsg_fc.h [SCSI] fc-transport: Use packed modifier for fc_bsg_request structure. 2010-01-17 12:36:33 -06:00
scsi_cmnd.h [SCSI] Deprecate SCSI_PROT_*_CONVERT operations 2009-10-02 09:46:25 -05:00
scsi_dbg.h [SCSI] Fix device not ready printk 2007-10-12 14:51:56 -04:00
scsi_device.h scsi/sd: add a no_read_capacity_16 scsi_device flag 2010-10-22 10:22:05 -07:00
scsi_devinfo.h Merge ../scsi-rc-fixes-2.6 2006-04-14 15:47:45 -05:00
scsi_dh.h [SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous 2009-12-04 12:00:46 -06:00
scsi_driver.h sd, sr: fix Driver 'sd' needs updating message 2009-06-21 12:01:27 -05:00
scsi_eh.h [SCSI] scsi_eh_prep_cmnd should save scmd->underflow 2008-07-26 15:14:56 -04:00
scsi_host.h SCSI host lock push-down 2010-11-16 13:33:23 -08:00
scsi_ioctl.h [PATCH] don't mess with file in scsi_nonblockable_ioctl() 2008-10-21 07:47:28 -04:00
scsi_netlink.h scsi: use __uX types for headers exported to user space 2010-08-11 08:59:01 -07:00
scsi_netlink_fc.h [SCSI] SCSI & FC transport: extend event vendor id's to 64bits 2006-09-02 15:35:15 -05:00
scsi_scan.h PM/Hibernate: Wait for SCSI devices scan to complete during resume 2009-04-13 11:37:07 -07:00
scsi_tcq.h block: remove spurious uses of REQ_HARDBARRIER 2010-09-10 12:35:36 +02:00
scsi_tgt.h [SCSI] tgt: add I_T nexus support 2007-10-12 14:37:50 -04:00
scsi_tgt_if.h [SCSI] tgt: add I_T nexus support 2007-10-12 14:37:50 -04:00
scsi_transport.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
scsi_transport_fc.h [SCSI] fc class: add fc host dev loss sysfs file 2010-10-07 17:09:44 -05:00
scsi_transport_iscsi.h [SCSI] iscsi_transport: wait on session in error handler path 2010-07-28 09:06:06 -05:00
scsi_transport_sas.h [SCSI] scsi_transport_sas: add support for transport layer retries (TLR) 2010-02-08 17:15:19 -06:00
scsi_transport_spi.h [SCSI] aic79xx: make driver respect nvram for IU and QAS settings 2009-06-15 10:09:35 -05:00
scsi_transport_srp.h [SCSI] tgt: move tsk_mgmt_response callback to transport class 2007-10-12 14:38:01 -04:00
scsicam.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sg.h sysctl extern cleanup: sg 2010-03-12 15:53:10 -08:00
srp.h IB/srp: Implement SRP_CRED_REQ and SRP_AER_REQ 2010-10-22 22:19:10 -07:00