Merge tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - A copy of Arnds compat wrapper generation series

 - Pass information about the KVM guest to the host in form the control
   program code and the control program version code

 - Map IOV resources to support PCI physical functions on s390

 - Add vector load and store alignment hints to improve performance

 - Use the "jdd" constraint with gcc 9 to make jump labels working again

 - Remove amode workaround for old z/VM releases from the DCSS code

 - Add support for in-kernel performance measurements using the CPU
   measurement counter facility

 - Introduce a new PMU device cpum_cf_diag to capture counters and store
   thenn as event raw data.

 - Bug fixes and cleanups

* tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (54 commits)
  Revert "s390/cpum_cf: Add kernel message exaplanations"
  s390/dasd: fix read device characteristic with CONFIG_VMAP_STACK=y
  s390/suspend: fix prefix register reset in swsusp_arch_resume
  s390: warn about clearing als implied facilities
  s390: allow overriding facilities via command line
  s390: clean up redundant facilities list setup
  s390/als: remove duplicated in-place implementation of stfle
  s390/cio: Use cpa range elsewhere within vfio-ccw
  s390/cio: Fix vfio-ccw handling of recursive TICs
  s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem
  s390/cpum_cf: Handle EBUSY return code from CPU counter facility reservation
  s390/cpum_cf: Add kernel message exaplanations
  s390/cpum_cf_diag: Add support for s390 counter facility diagnostic trace
  s390/cpum_cf: add ctr_stcctm() function
  s390/cpum_cf: move common functions into a separate file
  s390/cpum_cf: introduce kernel_cpumcf_avail() function
  s390/cpu_mf: replace stcctm5() with the stcctm() function
  s390/cpu_mf: add store cpu counter multiple instruction support
  s390/cpum_cf: Add minimal in-kernel interface for counter measurements
  s390/cpum_cf: introduce kernel_cpumcf_alert() to obtain measurement alerts
  ...

1 files changed, 5 insertions, 14 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 397af07e4d88..e03304fe25bb 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3965,13 +3965,11 @@ int dasd_generic_restore_device(struct ccw_device *cdev)
 EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
 
 static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
-						   void *rdc_buffer,
 						   int rdc_buffer_size,
 						   int magic)
 {
 	struct dasd_ccw_req *cqr;
 	struct ccw1 *ccw;
-	unsigned long *idaw;
 
 	cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device,
 				   NULL);
@@ -3986,16 +3984,8 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
 
 	ccw = cqr->cpaddr;
 	ccw->cmd_code = CCW_CMD_RDC;
-	if (idal_is_needed(rdc_buffer, rdc_buffer_size)) {
-		idaw = (unsigned long *) (cqr->data);
-		ccw->cda = (__u32)(addr_t) idaw;
-		ccw->flags = CCW_FLAG_IDA;
-		idaw = idal_create_words(idaw, rdc_buffer, rdc_buffer_size);
-	} else {
-		ccw->cda = (__u32)(addr_t) rdc_buffer;
-		ccw->flags = 0;
-	}
-
+	ccw->cda = (__u32)(addr_t) cqr->data;
+	ccw->flags = 0;
 	ccw->count = rdc_buffer_size;
 	cqr->startdev = device;
 	cqr->memdev = device;
@@ -4013,12 +4003,13 @@ int dasd_generic_read_dev_chars(struct dasd_device *device, int magic,
 	int ret;
 	struct dasd_ccw_req *cqr;
 
-	cqr = dasd_generic_build_rdc(device, rdc_buffer, rdc_buffer_size,
-				     magic);
+	cqr = dasd_generic_build_rdc(device, rdc_buffer_size, magic);
 	if (IS_ERR(cqr))
 		return PTR_ERR(cqr);
 
 	ret = dasd_sleep_on(cqr);
+	if (ret == 0)
+		memcpy(rdc_buffer, cqr->data, rdc_buffer_size);
 	dasd_sfree_request(cqr, cqr->memdev);
 	return ret;
 }