linux/drivers/scsi/aacraid
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
..
aachba.c [SCSI] aacraid: prohibit access to array container space 2010-05-16 22:49:46 -04:00
aacraid.h [SCSI] aacraid: add an ifdef'd device delete case instead of taking the device offline 2010-05-16 22:58:27 -04:00
commctrl.c [SCSI] aacraid: semaphore cleanup 2010-09-16 22:54:09 -04:00
comminit.c [SCSI] aacraid: fix File System going into read-only mode 2010-01-17 12:16:17 -06:00
commsup.c [SCSI] aacraid: semaphore cleanup 2010-09-16 22:54:09 -04:00
dpcsup.c [SCSI] aacraid: fix File System going into read-only mode 2010-01-17 12:16:17 -06:00
linit.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
Makefile
nark.c
rkt.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
rx.c drivers: scsi: use newly introduced hex_to_bin() method 2010-08-11 08:59:02 -07:00
sa.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
TODO