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author <htejun@gmail.com>2005-04-17 21:57:29 +0200
committerJames Bottomley <jejb@titanic>2005-04-18 19:35:31 +0200
commit06f81ea8ca09b880cadf101d7e23b500e9c164bc (patch)
tree87e70ac102f2498214f42e8f0ad879513669881b /include/scsi
parentscsi: add DID_REQUEUE to the error handling (diff)
downloadlinux-06f81ea8ca09b880cadf101d7e23b500e9c164bc.tar.xz
linux-06f81ea8ca09b880cadf101d7e23b500e9c164bc.zip
[PATCH] scsi: remove volatile from scsi data
This patch removes volatile qualifier from scsi_device->device_busy, Scsi_Host->host_busy and ->host_failed as the volatile qualifiers don't serve any purpose now. While at it, convert those fields from unsigned short to unsigned int as suggested by Christoph. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_device.h3
-rw-r--r--include/scsi/scsi_host.h10
2 files changed, 10 insertions, 3 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 07d974051b0c..7099d2ce967e 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -43,7 +43,8 @@ struct scsi_device {
struct list_head siblings; /* list of all devices on this host */
struct list_head same_target_siblings; /* just the devices sharing same target id */
- volatile unsigned short device_busy; /* commands actually active on low-level */
+ unsigned int device_busy; /* commands actually active on
+ * low-level. protected by queue_lock. */
spinlock_t sdev_lock; /* also the request queue_lock */
spinlock_t list_lock;
struct list_head cmd_list; /* queue of in use SCSI Command structures */
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 27f2c4e8943a..1cee1e100943 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -448,8 +448,14 @@ struct Scsi_Host {
wait_queue_head_t host_wait;
struct scsi_host_template *hostt;
struct scsi_transport_template *transportt;
- volatile unsigned short host_busy; /* commands actually active on low-level */
- volatile unsigned short host_failed; /* commands that failed. */
+
+ /*
+ * The following two fields are protected with host_lock;
+ * however, eh routines can safely access during eh processing
+ * without acquiring the lock.
+ */
+ unsigned int host_busy; /* commands actually active on low-level */
+ unsigned int host_failed; /* commands that failed. */
unsigned short host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
int resetting; /* if set, it means that last_reset is a valid value */