Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] fix kprobes single stepping
  [S390] tape: fix dbf usage
  [S390] dasd: provide a Sense Path Group ID ioctl
  [S390] ftrace: select HAVE_C_RECORDMCOUNT
  [S390] vdso: get rid of redefinition warnings
  [S390] facility detection: remove unused variable
  [S390] hypfs: Fix error handling in hypfs_diag initialization
  [S390] topology: fix cpu masks for topology=off case
  [S390] topology: add SCHED_MC config option
  [S390] Kconfig: add machine type number to code generation options
  [S390] Add z196 machine type to setup_hwcaps

4 files changed, 76 insertions, 7 deletions

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 50cf96389d2c..bf61274af3bb 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2802,6 +2802,73 @@ dasd_eckd_steal_lock(struct dasd_device *device)
 }
 
 /*
+ * SNID - Sense Path Group ID
+ * This ioctl may be used in situations where I/O is stalled due to
+ * a reserve, so if the normal dasd_smalloc_request fails, we use the
+ * preallocated dasd_reserve_req.
+ */
+static int dasd_eckd_snid(struct dasd_device *device,
+			  void __user *argp)
+{
+	struct dasd_ccw_req *cqr;
+	int rc;
+	struct ccw1 *ccw;
+	int useglobal;
+	struct dasd_snid_ioctl_data usrparm;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
+		return -EFAULT;
+
+	useglobal = 0;
+	cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
+				   sizeof(struct dasd_snid_data), device);
+	if (IS_ERR(cqr)) {
+		mutex_lock(&dasd_reserve_mutex);
+		useglobal = 1;
+		cqr = &dasd_reserve_req->cqr;
+		memset(cqr, 0, sizeof(*cqr));
+		memset(&dasd_reserve_req->ccw, 0,
+		       sizeof(dasd_reserve_req->ccw));
+		cqr->cpaddr = &dasd_reserve_req->ccw;
+		cqr->data = &dasd_reserve_req->data;
+		cqr->magic = DASD_ECKD_MAGIC;
+	}
+	ccw = cqr->cpaddr;
+	ccw->cmd_code = DASD_ECKD_CCW_SNID;
+	ccw->flags |= CCW_FLAG_SLI;
+	ccw->count = 12;
+	ccw->cda = (__u32)(addr_t) cqr->data;
+	cqr->startdev = device;
+	cqr->memdev = device;
+	clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+	set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+	cqr->retries = 5;
+	cqr->expires = 10 * HZ;
+	cqr->buildclk = get_clock();
+	cqr->status = DASD_CQR_FILLED;
+	cqr->lpm = usrparm.path_mask;
+
+	rc = dasd_sleep_on_immediatly(cqr);
+	/* verify that I/O processing didn't modify the path mask */
+	if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
+		rc = -EIO;
+	if (!rc) {
+		usrparm.data = *((struct dasd_snid_data *)cqr->data);
+		if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
+			rc = -EFAULT;
+	}
+
+	if (useglobal)
+		mutex_unlock(&dasd_reserve_mutex);
+	else
+		dasd_sfree_request(cqr, cqr->memdev);
+	return rc;
+}
+
+/*
  * Read performance statistics
  */
 static int
@@ -3036,6 +3103,8 @@ dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
 		return dasd_eckd_reserve(device);
 	case BIODASDSLCK:
 		return dasd_eckd_steal_lock(device);
+	case BIODASDSNID:
+		return dasd_eckd_snid(device, argp);
 	case BIODASDSYMMIO:
 		return dasd_symm_io(device, argp);
 	default:
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 0eb49655a6cd..12097c24f2f5 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -27,6 +27,7 @@
 #define DASD_ECKD_CCW_WRITE_CKD		 0x1d
 #define DASD_ECKD_CCW_READ_CKD		 0x1e
 #define DASD_ECKD_CCW_PSF		 0x27
+#define DASD_ECKD_CCW_SNID		 0x34
 #define DASD_ECKD_CCW_RSSD		 0x3e
 #define DASD_ECKD_CCW_LOCATE_RECORD	 0x47
 #define DASD_ECKD_CCW_SNSS		 0x54
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 29c2d73d719d..6c408670e08d 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -1077,15 +1077,14 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 		/* FIXME: What to do with the request? */
 		switch (PTR_ERR(irb)) {
 			case -ETIMEDOUT:
-				DBF_LH(1, "(%s): Request timed out\n",
-					dev_name(&cdev->dev));
+				DBF_LH(1, "(%08x): Request timed out\n",
+				       device->cdev_id);
 			case -EIO:
 				__tape_end_request(device, request, -EIO);
 				break;
 			default:
-				DBF_LH(1, "(%s): Unexpected i/o error %li\n",
-					dev_name(&cdev->dev),
-					PTR_ERR(irb));
+				DBF_LH(1, "(%08x): Unexpected i/o error %li\n",
+				       device->cdev_id,	PTR_ERR(irb));
 		}
 		return;
 	}
diff --git a/drivers/s390/char/tape_std.c b/drivers/s390/char/tape_std.c
index 03f07e5dd6e9..3c3f342149ec 100644
--- a/drivers/s390/char/tape_std.c
+++ b/drivers/s390/char/tape_std.c
@@ -47,8 +47,8 @@ tape_std_assign_timeout(unsigned long data)
 			device->cdev_id);
 	rc = tape_cancel_io(device, request);
 	if(rc)
-		DBF_EVENT(3, "(%s): Assign timeout: Cancel failed with rc = %i\n",
-			dev_name(&device->cdev->dev), rc);
+		DBF_EVENT(3, "(%08x): Assign timeout: Cancel failed with rc = "
+			  "%i\n", device->cdev_id, rc);
 }
 
 int