linux/drivers/scsi/aic7xxx
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
..
aicasm
.gitignore
Kconfig.aic7xxx
Kconfig.aic79xx
Makefile
aic7xxx.h
aic7xxx.reg
aic7xxx.seq
aic7xxx_93cx6.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_93cx6.h
aic7xxx_core.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_inline.h
aic7xxx_osm.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aic7xxx_osm.h [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_osm_pci.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_pci.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_pci.h
aic7xxx_proc.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7xxx_reg.h_shipped
aic7xxx_reg_print.c_shipped
aic7xxx_seq.h_shipped
aic79xx.h
aic79xx.reg
aic79xx.seq
aic79xx_core.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic79xx_inline.h
aic79xx_osm.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
aic79xx_osm.h [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic79xx_osm_pci.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic79xx_pci.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic79xx_pci.h
aic79xx_proc.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic79xx_reg.h_shipped
aic79xx_reg_print.c_shipped
aic79xx_seq.h_shipped
aic7770.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aic7770_osm.c [SCSI] aic7xxx: Remove OS utility wrappers 2010-07-28 09:05:27 -05:00
aiclib.c
aiclib.h
cam.h
queue.h
scsi_iu.h
scsi_message.h