[GIT PULL] s390 fixes for 6.18-rc4

[Heiko Carstens <hca@linux.ibm.com>]

Hi Linus,

please pull some s390 fixes for 6.18-rc4.

Thanks,
Heiko

The following changes since commit 211ddde0823f1442e4ad052a2f30f050145ccada:

  Linux 6.18-rc2 (2025-10-19 15:19:16 -1000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-6.18-3

for you to fetch changes up to 64e2f60f355e556337fcffe80b9bcff1b22c9c42:

  s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP (2025-10-30 16:59:28 +0100)

----------------------------------------------------------------
s390 fixes for 6.18-rc4

- Use correct locking in zPCI event code to avoid deadlock

- Get rid of irqs_registered flag in zpci_dev structure and restore IRQ
  unconditionally for zPCI devices. This fixes sit uations where the flag
  was not correctly updated

- Fix potential memory leak kernel page table dumper code

- Disable (revert) ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP for s390 again. The
  optimized hugetlb vmemmap code modifies kernel page tables in a way which
  does not work on s390 and leads to reproducible kernel crashes due to
  stale TLB entries. This needs to be addressed with some larger changes.
  For now simply disable the feature

- Update defconfigs

----------------------------------------------------------------
Farhan Ali (1):
      s390/pci: Restore IRQ unconditionally for the zPCI device

Gerd Bayer (1):
      s390/pci: Avoid deadlock between PCI error recovery and mlx5 crdump

Heiko Carstens (2):
      s390: Update defconfigs
      s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP

Miaoqian Lin (1):
      s390/mm: Fix memory leak in add_marker() when kvrealloc() fails

 arch/s390/Kconfig                    |  1 -
 arch/s390/configs/debug_defconfig    | 14 +++++++++-----
 arch/s390/configs/defconfig          | 14 +++++++++-----
 arch/s390/configs/zfcpdump_defconfig |  1 -
 arch/s390/include/asm/pci.h          |  1 -
 arch/s390/mm/dump_pagetables.c       | 19 +++++++------------
 arch/s390/pci/pci_event.c            |  4 ++--
 arch/s390/pci/pci_irq.c              |  9 +--------
 8 files changed, 28 insertions(+), 35 deletions(-)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c4145672ca34..df22b10d9141 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -158,7 +158,6 @@ config S390
 	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
 	select ARCH_WANT_KERNEL_PMD_MKWRITE
 	select ARCH_WANT_LD_ORPHAN_WARN
-	select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 	select ARCH_WANTS_THP_SWAP
 	select BUILDTIME_TABLE_SORT
 	select CLONE_BACKWARDS2
diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index b31c1df90257..8433f769f7e1 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -101,6 +101,7 @@ CONFIG_SLUB_STATS=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_KSM=y
+CONFIG_PERSISTENT_HUGE_ZERO_FOLIO=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_CMA_DEBUGFS=y
 CONFIG_CMA_SYSFS=y
@@ -123,12 +124,12 @@ CONFIG_TLS_DEVICE=y
 CONFIG_TLS_TOE=y
 CONFIG_XFRM_USER=m
 CONFIG_NET_KEY=m
-CONFIG_XDP_SOCKETS=y
-CONFIG_XDP_SOCKETS_DIAG=m
-CONFIG_DIBS=y
-CONFIG_DIBS_LO=y
 CONFIG_SMC=m
 CONFIG_SMC_DIAG=m
+CONFIG_DIBS=y
+CONFIG_DIBS_LO=y
+CONFIG_XDP_SOCKETS=y
+CONFIG_XDP_SOCKETS_DIAG=m
 CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
 CONFIG_IP_ADVANCED_ROUTER=y
@@ -472,6 +473,7 @@ CONFIG_SCSI_DH_EMC=m
 CONFIG_SCSI_DH_ALUA=m
 CONFIG_MD=y
 CONFIG_BLK_DEV_MD=y
+CONFIG_MD_LLBITMAP=y
 # CONFIG_MD_BITMAP_FILE is not set
 CONFIG_MD_LINEAR=m
 CONFIG_MD_CLUSTER=m
@@ -654,9 +656,12 @@ CONFIG_JFS_POSIX_ACL=y
 CONFIG_JFS_SECURITY=y
 CONFIG_JFS_STATISTICS=y
 CONFIG_XFS_FS=y
+CONFIG_XFS_SUPPORT_V4=y
+CONFIG_XFS_SUPPORT_ASCII_CI=y
 CONFIG_XFS_QUOTA=y
 CONFIG_XFS_POSIX_ACL=y
 CONFIG_XFS_RT=y
+# CONFIG_XFS_ONLINE_SCRUB is not set
 CONFIG_XFS_DEBUG=y
 CONFIG_GFS2_FS=m
 CONFIG_GFS2_FS_LOCKING_DLM=y
@@ -666,7 +671,6 @@ CONFIG_BTRFS_FS_POSIX_ACL=y
 CONFIG_BTRFS_DEBUG=y
 CONFIG_BTRFS_ASSERT=y
 CONFIG_NILFS2_FS=m
-CONFIG_FS_DAX=y
 CONFIG_EXPORTFS_BLOCK_OPS=y
 CONFIG_FS_ENCRYPTION=y
 CONFIG_FS_VERITY=y
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index 161dad7ef211..4414dabd04a6 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -94,6 +94,7 @@ CONFIG_SLAB_BUCKETS=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_KSM=y
+CONFIG_PERSISTENT_HUGE_ZERO_FOLIO=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_CMA_SYSFS=y
 CONFIG_CMA_AREAS=7
@@ -114,12 +115,12 @@ CONFIG_TLS_DEVICE=y
 CONFIG_TLS_TOE=y
 CONFIG_XFRM_USER=m
 CONFIG_NET_KEY=m
-CONFIG_XDP_SOCKETS=y
-CONFIG_XDP_SOCKETS_DIAG=m
-CONFIG_DIBS=y
-CONFIG_DIBS_LO=y
 CONFIG_SMC=m
 CONFIG_SMC_DIAG=m
+CONFIG_DIBS=y
+CONFIG_DIBS_LO=y
+CONFIG_XDP_SOCKETS=y
+CONFIG_XDP_SOCKETS_DIAG=m
 CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
 CONFIG_IP_ADVANCED_ROUTER=y
@@ -462,6 +463,7 @@ CONFIG_SCSI_DH_EMC=m
 CONFIG_SCSI_DH_ALUA=m
 CONFIG_MD=y
 CONFIG_BLK_DEV_MD=y
+CONFIG_MD_LLBITMAP=y
 # CONFIG_MD_BITMAP_FILE is not set
 CONFIG_MD_LINEAR=m
 CONFIG_MD_CLUSTER=m
@@ -644,16 +646,18 @@ CONFIG_JFS_POSIX_ACL=y
 CONFIG_JFS_SECURITY=y
 CONFIG_JFS_STATISTICS=y
 CONFIG_XFS_FS=y
+CONFIG_XFS_SUPPORT_V4=y
+CONFIG_XFS_SUPPORT_ASCII_CI=y
 CONFIG_XFS_QUOTA=y
 CONFIG_XFS_POSIX_ACL=y
 CONFIG_XFS_RT=y
+# CONFIG_XFS_ONLINE_SCRUB is not set
 CONFIG_GFS2_FS=m
 CONFIG_GFS2_FS_LOCKING_DLM=y
 CONFIG_OCFS2_FS=m
 CONFIG_BTRFS_FS=y
 CONFIG_BTRFS_FS_POSIX_ACL=y
 CONFIG_NILFS2_FS=m
-CONFIG_FS_DAX=y
 CONFIG_EXPORTFS_BLOCK_OPS=y
 CONFIG_FS_ENCRYPTION=y
 CONFIG_FS_VERITY=y
diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index ed0b137353ad..b5478267d6a7 100644
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -33,7 +33,6 @@ CONFIG_NET=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_SAFE=y
 CONFIG_BLK_DEV_RAM=y
-# CONFIG_DCSSBLK is not set
 # CONFIG_DASD is not set
 CONFIG_ENCLOSURE_SERVICES=y
 CONFIG_SCSI=y
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 6890925d5587..a32f465ecf73 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -145,7 +145,6 @@ struct zpci_dev {
 	u8		has_resources	: 1;
 	u8		is_physfn	: 1;
 	u8		util_str_avail	: 1;
-	u8		irqs_registered	: 1;
 	u8		tid_avail	: 1;
 	u8		rtr_avail	: 1; /* Relaxed translation allowed */
 	unsigned int	devfn;		/* DEVFN part of the RID*/
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index 9af2aae0a515..528d7c70979f 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -291,16 +291,14 @@ static int ptdump_cmp(const void *a, const void *b)
 
 static int add_marker(unsigned long start, unsigned long end, const char *name)
 {
-	size_t oldsize, newsize;
+	struct addr_marker *new;
+	size_t newsize;
 
-	oldsize = markers_cnt * sizeof(*markers);
-	newsize = oldsize + 2 * sizeof(*markers);
-	if (!oldsize)
-		markers = kvmalloc(newsize, GFP_KERNEL);
-	else
-		markers = kvrealloc(markers, newsize, GFP_KERNEL);
-	if (!markers)
-		goto error;
+	newsize = (markers_cnt + 2) * sizeof(*markers);
+	new = kvrealloc(markers, newsize, GFP_KERNEL);
+	if (!new)
+		return -ENOMEM;
+	markers = new;
 	markers[markers_cnt].is_start = 1;
 	markers[markers_cnt].start_address = start;
 	markers[markers_cnt].size = end - start;
@@ -312,9 +310,6 @@ static int add_marker(unsigned long start, unsigned long end, const char *name)
 	markers[markers_cnt].name = name;
 	markers_cnt++;
 	return 0;
-error:
-	markers_cnt = 0;
-	return -ENOMEM;
 }
 
 static int pt_dump_init(void)
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index b95376041501..27db1e72c623 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -188,7 +188,7 @@ static pci_ers_result_t zpci_event_attempt_error_recovery(struct pci_dev *pdev)
 	 * is unbound or probed and that userspace can't access its
 	 * configuration space while we perform recovery.
 	 */
-	pci_dev_lock(pdev);
+	device_lock(&pdev->dev);
 	if (pdev->error_state == pci_channel_io_perm_failure) {
 		ers_res = PCI_ERS_RESULT_DISCONNECT;
 		goto out_unlock;
@@ -257,7 +257,7 @@ static pci_ers_result_t zpci_event_attempt_error_recovery(struct pci_dev *pdev)
 		driver->err_handler->resume(pdev);
 	pci_uevent_ers(pdev, PCI_ERS_RESULT_RECOVERED);
 out_unlock:
-	pci_dev_unlock(pdev);
+	device_unlock(&pdev->dev);
 	zpci_report_status(zdev, "recovery", status_str);
 
 	return ers_res;
diff --git a/arch/s390/pci/pci_irq.c b/arch/s390/pci/pci_irq.c
index 84482a921332..e73be96ce5fe 100644
--- a/arch/s390/pci/pci_irq.c
+++ b/arch/s390/pci/pci_irq.c
@@ -107,9 +107,6 @@ static int zpci_set_irq(struct zpci_dev *zdev)
 	else
 		rc = zpci_set_airq(zdev);
 
-	if (!rc)
-		zdev->irqs_registered = 1;
-
 	return rc;
 }
 
@@ -123,9 +120,6 @@ static int zpci_clear_irq(struct zpci_dev *zdev)
 	else
 		rc = zpci_clear_airq(zdev);
 
-	if (!rc)
-		zdev->irqs_registered = 0;
-
 	return rc;
 }
 
@@ -427,8 +421,7 @@ bool arch_restore_msi_irqs(struct pci_dev *pdev)
 {
 	struct zpci_dev *zdev = to_zpci(pdev);
 
-	if (!zdev->irqs_registered)
-		zpci_set_irq(zdev);
+	zpci_set_irq(zdev);
 	return true;
 }