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[SCSI] async: introduce 'async_domain' type

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This is in preparation for teaching async_synchronize_full() to sync all
pending async work, and not just on the async_running domain.  This
conversion is functionally equivalent, just embedding the existing list
in a new async_domain type.

The .registered attribute is used in a later patch to distinguish
between domains that want to be flushed by async_synchronize_full()
versus those that only expect async_synchronize_{full|cookie}_domain to
be used for flushing.

[jejb: add async.h to scsi_priv.h for struct async_domain]
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Arjan van de Ven <[email protected]>
Acked-by: Mark Brown <[email protected]>
Tested-by: Eldad Zack <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Dan Williams 2012-07-09 19:33:25 -07:00 • committed by James Bottomley
commit 2955b47d2c
7 changed files with 55 additions and 27 deletions
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2
drivers/scsi/libsas/sas_ata.c
View file

@ -742,7 +742,7 @@ static void async_sas_ata_eh(void *data, async_cookie_t cookie)
void sas_ata_strategy_handler(struct Scsi_Host *shost)
{
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
LIST_HEAD(async);
ASYNC_DOMAIN_EXCLUSIVE(async);
int i;
/* it's ok to defer revalidation events during ata eh, these

3
drivers/scsi/scsi.c
View file

@ -54,6 +54,7 @@
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/mutex.h>
#include <linux/async.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@ -91,7 +92,7 @@ EXPORT_SYMBOL(scsi_logging_level);
#endif
/* sd, scsi core and power management need to coordinate flushing async actions */
LIST_HEAD(scsi_sd_probe_domain);
ASYNC_DOMAIN(scsi_sd_probe_domain);
EXPORT_SYMBOL(scsi_sd_probe_domain);
/* NB: These are exposed through /proc/scsi/scsi and form part of the ABI.

3
drivers/scsi/scsi_priv.h
View file

@ -2,6 +2,7 @@
#define _SCSI_PRIV_H
#include <linux/device.h>
#include <linux/async.h>
#include <scsi/scsi_device.h>
struct request_queue;
@ -163,7 +164,7 @@ static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
#endif /* CONFIG_PM_RUNTIME */
extern struct list_head scsi_sd_probe_domain;
extern struct async_domain scsi_sd_probe_domain;
/*
* internal scsi timeout functions: for use by mid-layer and transport