From: Date: Sun, 17 Apr 2005 19:57:29 +0000 (-0500) Subject: [PATCH] scsi: remove volatile from scsi data X-Git-Tag: v2.6.12-rc3~41^2~1 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06f81ea8ca09b880cadf101d7e23b500e9c164bc;p=linux-2.6 [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 Signed-off-by: James Bottomley --- diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 07d974051b..7099d2ce96 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 27f2c4e894..1cee1e1009 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 */