[GIT PULL] s390 fixes for 6.7-rc3

[Alexander Gordeev]

Hello Linus,

Please pull s390 changes for 6.7-rc3.

Please note the update to scripts/checkstack.pl concerns
s390-specific part only.

Thank you,
Alexander

The following changes since commit 98b1cc82c4affc16f5598d4fa14b1858671b2263:

  Linux 6.7-rc2 (2023-11-19 15:02:14 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-6.7-3

for you to fetch changes up to aab1f809d7540def24498e81347740a7239a74d5:

  scripts/checkstack.pl: match all stack sizes for s390 (2023-11-22 15:06:23 +0100)

----------------------------------------------------------------
s390 updates for 6.7-rc3

- Remove unnecessary assignment of the performance event last_tag.

- Create missing /sys/firmware/ipl/* attributes when kernel is
  booted in dump mode using List-directed ECKD IPL.

- Remove odd comment.

- Fix s390-specific part of scripts/checkstack.pl script that only
  matches three-digit numbers starting with 3 or any higher number
  and skips any stack sizes smaller than 304 bytes.

----------------------------------------------------------------
Heiko Carstens (2):
      s390: remove odd comment
      scripts/checkstack.pl: match all stack sizes for s390

Mikhail Zaslonko (1):
      s390/ipl: add missing IPL_TYPE_ECKD_DUMP case to ipl_init()

Thomas Richter (1):
      s390/pai: cleanup event initialization

 arch/s390/include/asm/processor.h  |  1 -
 arch/s390/kernel/ipl.c             |  1 +
 arch/s390/kernel/perf_pai_crypto.c | 11 +++++------
 arch/s390/kernel/perf_pai_ext.c    |  1 -
 scripts/checkstack.pl              |  3 +--
 5 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index dc17896a001a..c15eadbb9983 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -228,7 +228,6 @@ typedef struct thread_struct thread_struct;
 	execve_tail();							\
 } while (0)
 
-/* Forward declaration, a strange C thing */
 struct task_struct;
 struct mm_struct;
 struct seq_file;
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index cc364fce6aa9..ba75f6bee774 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -666,6 +666,7 @@ static int __init ipl_init(void)
 						&ipl_ccw_attr_group_lpar);
 		break;
 	case IPL_TYPE_ECKD:
+	case IPL_TYPE_ECKD_DUMP:
 		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
 		break;
 	case IPL_TYPE_FCP:
diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c
index 77fd24e6cbb6..39a91b00438a 100644
--- a/arch/s390/kernel/perf_pai_crypto.c
+++ b/arch/s390/kernel/perf_pai_crypto.c
@@ -279,12 +279,6 @@ static int paicrypt_event_init(struct perf_event *event)
 	if (IS_ERR(cpump))
 		return PTR_ERR(cpump);
 
-	/* Event initialization sets last_tag to 0. When later on the events
-	 * are deleted and re-added, do not reset the event count value to zero.
-	 * Events are added, deleted and re-added when 2 or more events
-	 * are active at the same time.
-	 */
-	event->hw.last_tag = 0;
 	event->destroy = paicrypt_event_destroy;
 
 	if (a->sample_period) {
@@ -318,6 +312,11 @@ static void paicrypt_start(struct perf_event *event, int flags)
 {
 	u64 sum;
 
+	/* Event initialization sets last_tag to 0. When later on the events
+	 * are deleted and re-added, do not reset the event count value to zero.
+	 * Events are added, deleted and re-added when 2 or more events
+	 * are active at the same time.
+	 */
 	if (!event->hw.last_tag) {
 		event->hw.last_tag = 1;
 		sum = paicrypt_getall(event);		/* Get current value */
diff --git a/arch/s390/kernel/perf_pai_ext.c b/arch/s390/kernel/perf_pai_ext.c
index 8ba0f1a3a39d..e7013a2e8960 100644
--- a/arch/s390/kernel/perf_pai_ext.c
+++ b/arch/s390/kernel/perf_pai_ext.c
@@ -260,7 +260,6 @@ static int paiext_event_init(struct perf_event *event)
 	rc = paiext_alloc(a, event);
 	if (rc)
 		return rc;
-	event->hw.last_tag = 0;
 	event->destroy = paiext_event_destroy;
 
 	if (a->sample_period) {
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 84f5fb7f1cec..d83ba5d8f3f4 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -97,8 +97,7 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
 		#   11160:       a7 fb ff 60             aghi   %r15,-160
 		# or
 		#  100092:	 e3 f0 ff c8 ff 71	 lay	 %r15,-56(%r15)
-		$re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
-		      (?:\(\%r15\))?$/ox;
+		$re = qr/.*(?:lay|ag?hi).*\%r15,-([0-9]+)(?:\(\%r15\))?$/o;
 	} elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
 		# f0019d10:       9d e3 bf 90     save  %sp, -112, %sp
 		$re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;