Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - The remaining patches for the z13 machine support: kernel build
   option for z13, the cache synonym avoidance, SMT support,
   compare-and-delay for spinloops and the CES5S crypto adapater.

 - The ftrace support for function tracing with the gcc hotpatch option.
   This touches common code Makefiles, Steven is ok with the changes.

 - The hypfs file system gets an extension to access diagnose 0x0c data
   in user space for performance analysis for Linux running under z/VM.

 - The iucv hvc console gets wildcard spport for the user id filtering.

 - The cacheinfo code is converted to use the generic infrastructure.

 - Cleanup and bug fixes.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits)
  s390/process: free vx save area when releasing tasks
  s390/hypfs: Eliminate hypfs interval
  s390/hypfs: Add diagnose 0c support
  s390/cacheinfo: don't use smp_processor_id() in preemptible context
  s390/zcrypt: fixed domain scanning problem (again)
  s390/smp: increase maximum value of NR_CPUS to 512
  s390/jump label: use different nop instruction
  s390/jump label: add sanity checks
  s390/mm: correct missing space when reporting user process faults
  s390/dasd: cleanup profiling
  s390/dasd: add locking for global_profile access
  s390/ftrace: hotpatch support for function tracing
  ftrace: let notrace function attribute disable hotpatching if necessary
  ftrace: allow architectures to specify ftrace compile options
  s390: reintroduce diag 44 calls for cpu_relax()
  s390/zcrypt: Add support for new crypto express (CEX5S) adapter.
  s390/zcrypt: Number of supported ap domains is not retrievable.
  s390/spinlock: add compare-and-delay to lock wait loops
  s390/tape: remove redundant if statement
  s390/hvc_iucv: add simple wildcard matches to the iucv allow filter
  ...

1 files changed, 14 insertions, 7 deletions

diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 78ac905a5b7f..aa7bb2d1da81 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -212,14 +212,15 @@ static int dasd_stats_proc_show(struct seq_file *m, void *v)
 	struct dasd_profile_info *prof;
 	int factor;
 
-	/* check for active profiling */
-	if (!dasd_global_profile_level) {
+	spin_lock_bh(&dasd_global_profile.lock);
+	prof = dasd_global_profile.data;
+	if (!prof) {
+		spin_unlock_bh(&dasd_global_profile.lock);
 		seq_printf(m, "Statistics are off - they might be "
 				    "switched on using 'echo set on > "
 				    "/proc/dasd/statistics'\n");
 		return 0;
 	}
-	prof = &dasd_global_profile_data;
 
 	/* prevent counter 'overflow' on output */
 	for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
@@ -255,6 +256,7 @@ static int dasd_stats_proc_show(struct seq_file *m, void *v)
 	dasd_statistics_array(m, prof->dasd_io_time3, factor);
 	seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
 	dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
+	spin_unlock_bh(&dasd_global_profile.lock);
 #else
 	seq_printf(m, "Statistics are not activated in this kernel\n");
 #endif
@@ -291,14 +293,19 @@ static ssize_t dasd_stats_proc_write(struct file *file,
 				dasd_stats_all_block_off();
 				goto out_error;
 			}
-			dasd_global_profile_reset();
+			rc = dasd_profile_on(&dasd_global_profile);
+			if (rc) {
+				dasd_stats_all_block_off();
+				goto out_error;
+			}
+			dasd_profile_reset(&dasd_global_profile);
 			dasd_global_profile_level = DASD_PROFILE_ON;
 			pr_info("The statistics feature has been switched "
 				"on\n");
 		} else if (strcmp(str, "off") == 0) {
-			/* switch off and reset statistics profiling */
+			/* switch off statistics profiling */
 			dasd_global_profile_level = DASD_PROFILE_OFF;
-			dasd_global_profile_reset();
+			dasd_profile_off(&dasd_global_profile);
 			dasd_stats_all_block_off();
 			pr_info("The statistics feature has been switched "
 				"off\n");
@@ -306,7 +313,7 @@ static ssize_t dasd_stats_proc_write(struct file *file,
 			goto out_parse_error;
 	} else if (strncmp(str, "reset", 5) == 0) {
 		/* reset the statistics */
-		dasd_global_profile_reset();
+		dasd_profile_reset(&dasd_global_profile);
 		dasd_stats_all_block_reset();
 		pr_info("The statistics have been reset\n");
 	} else