[SCSI] Remove ->pid field from scsi_cmnd

The pid field is a duplicate of the serial_number field and has been
scheduled for removal for a long time.  A few drivers were still using
it, so just change them to use serial_number instead.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 53e170586c2..4fddef72746 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -39,14 +39,12 @@ struct scsi_cmnd {
          * A SCSI Command is assigned a nonzero serial_number before passed
          * to the driver's queue command function.  The serial_number is
          * cleared when scsi_done is entered indicating that the command
-         * has been completed.  It currently doesn't have much use other
-         * than printk's.  Some lldd's use this number for other purposes.
-         * It's almost certain that such usages are either incorrect or
-         * meaningless.  Please kill all usages other than printk's.  Also,
-         * as this number is always identical to ->pid, please convert
-         * printk's to use ->pid, so that we can kill this field.
+         * has been completed.  It is a bug for LLDDs to use this number
+         * for purposes other than printk (and even that is only useful
+         * for debugging).
          */
         unsigned long serial_number;
+
         /*
          * This is set to jiffies as it was when the command was first
          * allocated.  It is used to time how long the command has
@@ -116,7 +114,6 @@ struct scsi_cmnd {
         int result;             /* Status code from lower level driver */
 
         unsigned char tag;      /* SCSI-II queued command tag */
-        unsigned long pid;      /* Process ID, starts at 0. Unique per host. */
 };
 
 extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);