[PATCH v2 0/4] Fixes for kernel 7.2

[PATCH v2 0/4] Fixes for kernel 7.2

[Mikko Rapeli]

v2: apply fixes to lttng-modules as patches instead of update to rc,
    copy only kernel/sched/ext/ext.h to kernel-devsrc

v1: https://lists.openembedded.org/g/openembedded-core/message/243418

These fixes are needed for Linux kernel 7.2-rc7 currently in linux-yocto-dev.
Tested with genericarm64 machine and core-image-sato-sdk image and oeqa
runtime tests on AMD KV260:

https://ledge.validation.linaro.org/scheduler/job/165060

2026-08-17 10:06:28,562 - runtime - INFO - SUMMARY:
2026-08-17 10:06:28,562 - runtime - INFO - runtime () - Ran 76 tests in 842.586s
2026-08-17 10:06:28,563 - runtime - INFO - runtime - OK - All required tests passed (successes=39, skipped=37, failures=0, errors=0)

Mikko Rapeli (4):
  lttng-modules: fix build with kernel 7.2
  testexport.bbclass: capture meta/lib/oe
  kernel-devsrc: copy gen-kernel-hwcaps.sh on arm64
  kernel-devsrc: copy kernel/sched/ext/ext.h

 meta/classes-recipe/testexport.bbclass        |   5 +-
 meta/recipes-kernel/linux/kernel-devsrc.bb    |   6 +
 ...ix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch | 100 ++++++++++++
 ...-Rename-kvm_cache_regs.h-regs.h-v7.2.patch |  54 +++++++
 ...-sk_skb_reason_drop-sock-parameter-v.patch |  61 +++++++
 ...oints-pass-a-transaction-handle-to-t.patch |  63 ++++++++
 ...oints-add-in_fsync-field-to-transact.patch |  41 +++++
 ...oints-trace-transaction-states-durin.patch |  68 ++++++++
 ...-Remove-strncpy-from-the-kernel-v7.2.patch | 153 ++++++++++++++++++
 .../lttng/lttng-modules_2.15.2.bb             |   9 +-
 10 files changed, 557 insertions(+), 3 deletions(-)
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch

-- 
2.55.0

[PATCH v2 1/4] lttng-modules: fix build with kernel 7.2

[Mikko Rapeli]

With patches from upstream 2.15 stable branch.
Fixes build error:

| lttng-syscalls.c: In function 'lttng_syscall_event_enabler_create_event':
| lttng-syscalls.c:612:17: error: implicit declaration of function 'strncpy' [-Wimplicit-function-declaration]
|   612 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
|       |                 ^~~~~~~
| lttng-syscalls.c:101:1: note: include '<string.h>' or provide a declaration of 'strncpy'
|   100 | #include <instrumentation/syscalls/syscalls_unknown.h>
|   +++ |+#include <string.h>
|   101 | #undef TRACE_SYSTEM
| lttng-syscalls.c:612:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
|   612 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
|       |                 ^~~~~~~
| lttng-syscalls.c:612:17: note: include '<string.h>' or provide a declaration of 'strncpy'
| lttng-syscalls.c:704:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
|   704 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
|       |                 ^~~~~~~
| lttng-syscalls.c:704:17: note: include '<string.h>' or provide a declaration of 'strncpy'

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 ...ix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch | 100 ++++++++++++
 ...-Rename-kvm_cache_regs.h-regs.h-v7.2.patch |  54 +++++++
 ...-sk_skb_reason_drop-sock-parameter-v.patch |  61 +++++++
 ...oints-pass-a-transaction-handle-to-t.patch |  63 ++++++++
 ...oints-add-in_fsync-field-to-transact.patch |  41 +++++
 ...oints-trace-transaction-states-durin.patch |  68 ++++++++
 ...-Remove-strncpy-from-the-kernel-v7.2.patch | 153 ++++++++++++++++++
 .../lttng/lttng-modules_2.15.2.bb             |   9 +-
 8 files changed, 548 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch
 create mode 100644 meta/recipes-kernel/lttng/lttng-modules/0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch

v2: change to patches over 2.15 release instead of an update to rc version
    since they are also in upstream 2.15 stable branch pending release

v1: https://lists.openembedded.org/g/openembedded-core/message/243419

diff --git a/meta/recipes-kernel/lttng/lttng-modules/0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch b/meta/recipes-kernel/lttng/lttng-modules/0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch
new file mode 100644
index 0000000000..850ff7c617
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch
@@ -0,0 +1,100 @@
+From 81b382b849b72e02e585f8b467161ae278e1b2c2 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 10:38:12 -0400
+Subject: [PATCH 1/7] fix: x86/msr: Remove rdmsrl() / wrmsrl() (v7.2)
+
+See upstream commits:
+
+  commit 666a5742b72133e219e989855e87d32fd8c95677
+  Author: Juergen Gross <jgross@suse.com>
+  Date:   Mon Jun 8 10:28:07 2026 +0200
+
+    x86/msr: Remove rdmsrl()
+
+    rdmsrl() has no users left. Delete it.
+
+  commit b5884070f9da9ffecd5141b5811cfdbaa274809a
+  Author: Juergen Gross <jgross@suse.com>
+  Date:   Mon Jun 8 10:28:09 2026 +0200
+
+    x86/msr: Remove wrmsrl()
+
+    wrmsrl() has no users left. Delete it.
+
+  commit c435e608cf59ffab815aa2571182dc8c50fe4112
+  Author: Ingo Molnar <mingo@kernel.org>
+  Date:   Wed Apr 9 22:28:54 2025 +0200
+
+    x86/msr: Rename 'rdmsrl()' to 'rdmsrq()'
+
+  commit 78255eb23973323633432d9ec40b65c15e41888a
+  Author: Ingo Molnar <mingo@kernel.org>
+  Date:   Wed Apr 9 22:28:55 2025 +0200
+
+    x86/msr: Rename 'wrmsrl()' to 'wrmsrq()'
+
+Upstream-Status: Backport
+
+Change-Id: Idf16225a146119986fb5fa811b527873d5581804
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/wrapper/ibt.h | 19 +++++++++++++++----
+ 1 file changed, 15 insertions(+), 4 deletions(-)
+
+diff --git a/include/wrapper/ibt.h b/include/wrapper/ibt.h
+index e089a8f6..53983802 100644
+--- a/include/wrapper/ibt.h
++++ b/include/wrapper/ibt.h
+@@ -8,6 +8,8 @@
+ #ifndef _LTTNG_WRAPPER_IBT_H
+ #define _LTTNG_WRAPPER_IBT_H
+ 
++#include <lttng/kernel-version.h>
++
+ struct irq_ibt_state {
+ 	u64 msr;
+ 	unsigned long flags;
+@@ -22,6 +24,15 @@ struct irq_ibt_state {
+ #ifdef CONFIG_X86_KERNEL_IBT
+ # include <asm/cpufeature.h>
+ # include <asm/msr.h>
++
++# if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,16,0))
++#  define lttng_rdmsrq rdmsrq
++#  define lttng_wrmsrq wrmsrq
++# else
++#  define lttng_rdmsrq rdmsrl
++#  define lttng_wrmsrq wrmsrl
++# endif
++
+ static inline __attribute__((always_inline))
+ struct irq_ibt_state wrapper_irq_ibt_save(void)
+ {
+@@ -31,8 +42,8 @@ struct irq_ibt_state wrapper_irq_ibt_save(void)
+ 	if (!cpu_feature_enabled(X86_FEATURE_IBT))
+ 		goto end;
+ 	local_irq_save(state.flags);
+-	rdmsrl(MSR_IA32_S_CET, msr);
+-	wrmsrl(MSR_IA32_S_CET, msr & ~CET_ENDBR_EN);
++	lttng_rdmsrq(MSR_IA32_S_CET, msr);
++	lttng_wrmsrq(MSR_IA32_S_CET, msr & ~CET_ENDBR_EN);
+ 	state.msr = msr;
+ end:
+ 	return state;
+@@ -45,10 +56,10 @@ void wrapper_irq_ibt_restore(struct irq_ibt_state state)
+ 
+ 	if (!cpu_feature_enabled(X86_FEATURE_IBT))
+ 		return;
+-	rdmsrl(MSR_IA32_S_CET, msr);
++	lttng_rdmsrq(MSR_IA32_S_CET, msr);
+ 	msr &= ~CET_ENDBR_EN;
+ 	msr |= (state.msr & CET_ENDBR_EN);
+-	wrmsrl(MSR_IA32_S_CET, msr);
++	lttng_wrmsrq(MSR_IA32_S_CET, msr);
+ 	local_irq_restore(state.flags);
+ }
+ #else
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch b/meta/recipes-kernel/lttng/lttng-modules/0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch
new file mode 100644
index 0000000000..17a1615e34
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch
@@ -0,0 +1,54 @@
+From de43b6dcacff6e725f831d2151bee43de2cda579 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 13:33:50 -0400
+Subject: [PATCH 2/7] fix: KVM: x86: Rename kvm_cache_regs.h => regs.h (v7.2)
+
+See upstream commit:
+
+  commit ece08316ca21ac2a3f3cc47a27b25f95adf1cfb2
+  Author: Sean Christopherson <seanjc@google.com>
+  Date:   Fri May 29 15:21:49 2026 -0700
+
+    KVM: x86: Rename kvm_cache_regs.h => regs.h
+
+    Rename kvm_cache_regs.h to simply regs.h, as the "cache" nomenclature is
+    already a lie (the file deals with state/registers that aren't cached per
+    se), and so that more code/functionality can be landed in the header
+    without making it a truly horrible misnomer.
+
+    Deliberately drop the kvm_ prefix/namespace to align with other "local"
+    headers, and to further differentiate regs.h from the public/global
+    arch/x86/include/asm/kvm_vcpu_regs.h, which sadly needs to stay in asm/
+    so that the number of registers can be referenced by kvm_vcpu_arch.
+
+    No functional change intended.
+
+Upstream-Status: Backport
+
+Change-Id: If61095ef1c19c34de3c04b0f19d4eccb4418386b
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/instrumentation/events/arch/x86/kvm/trace.h | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/include/instrumentation/events/arch/x86/kvm/trace.h b/include/instrumentation/events/arch/x86/kvm/trace.h
+index 265b0d81..79f2b473 100644
+--- a/include/instrumentation/events/arch/x86/kvm/trace.h
++++ b/include/instrumentation/events/arch/x86/kvm/trace.h
+@@ -12,7 +12,12 @@
+ #include <lttng/kernel-version.h>
+ #include <wrapper/kvm-x86.h>
+ #include <../arch/x86/kvm/lapic.h>
++
++#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(7,2,0))
++#include <../arch/x86/kvm/regs.h>
++#else
+ #include <../arch/x86/kvm/kvm_cache_regs.h>
++#endif
+ 
+ #undef TRACE_SYSTEM
+ #define TRACE_SYSTEM kvm_x86
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch b/meta/recipes-kernel/lttng/lttng-modules/0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch
new file mode 100644
index 0000000000..9240d3d07d
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch
@@ -0,0 +1,61 @@
+From 909a3356fbdff6ee5601217eba052b8d884b40e6 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 13:42:07 -0400
+Subject: [PATCH 3/7] fix: net: constify sk_skb_reason_drop() sock parameter
+ (v7.2)
+
+See upstream commit:
+
+  commit 5c4b709b5fc1929ed3e9d3ef48c089d7df8b8dff
+  Author: Eric Dumazet <edumazet@google.com>
+  Date:   Mon May 11 07:23:08 2026 +0000
+
+    net: constify sk_skb_reason_drop() sock parameter
+
+    sk_skb_reason_drop() does not change sock parameter, make it
+    const so that we can call it from TCP stack without a cast
+    on a (const) listener socket.
+
+Upstream-Status: Backport
+
+Change-Id: Iadb94b94b493d3806ccd7531d3a191a5dbc85da8
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/instrumentation/events/skb.h | 20 +++++++++++++++++++-
+ 1 file changed, 19 insertions(+), 1 deletion(-)
+
+diff --git a/include/instrumentation/events/skb.h b/include/instrumentation/events/skb.h
+index dd62e177..a1a84aae 100644
+--- a/include/instrumentation/events/skb.h
++++ b/include/instrumentation/events/skb.h
+@@ -43,7 +43,25 @@ LTTNG_TRACEPOINT_ENUM(skb_drop_reason,
+ )
+ #endif
+ 
+-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,11,0) || \
++#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(7,2,0))
++LTTNG_TRACEPOINT_EVENT_MAP(kfree_skb,
++
++	skb_kfree,
++
++	TP_PROTO(struct sk_buff *skb, void *location,
++		enum skb_drop_reason reason, const struct sock *rx_sk),
++
++	TP_ARGS(skb, location, reason, rx_sk),
++
++	TP_FIELDS(
++		ctf_integer_hex(void *, skbaddr, skb)
++		ctf_integer_hex(void *, location, location)
++		ctf_integer_network(unsigned short, protocol, skb->protocol)
++		ctf_enum(skb_drop_reason, uint8_t, reason, reason)
++		ctf_integer_hex(const void *, rx_skaddr, rx_sk)
++	)
++)
++#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,11,0) || \
+     LTTNG_RHEL_KERNEL_RANGE(5,14,0,503,21,1,  5,15,0,0,0,0))
+ 
+ LTTNG_TRACEPOINT_EVENT_MAP(kfree_skb,
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch b/meta/recipes-kernel/lttng/lttng-modules/0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch
new file mode 100644
index 0000000000..288c90431c
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch
@@ -0,0 +1,63 @@
+From 21d22aa8da0bb16dbb0a8e211941a0541d8ac5ec Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 13:50:27 -0400
+Subject: [PATCH 4/7] fix: btrfs: tracepoints: pass a transaction handle to
+ transaction commit event (v7.2)
+
+See upstream commit:
+
+  commit e1ad307c7ab1af0b5c14549b23982464c22996cc
+  Author: Filipe Manana <fdmanana@suse.com>
+  Date:   Fri Apr 17 17:43:19 2026 +0100
+
+    btrfs: tracepoints: pass a transaction handle to transaction commit event
+
+    The transaction commit tracepoint prints fs_info->generation as if it
+    were the ID of the committed transaction but this does not always match
+    that ID. This is because the trace point is called in the transaction
+    commit path after the transaction is in the TRANS_STATE_COMPLETED state,
+    which means another transaction may have already started (which can happen
+    as soon as the transaction state was set to TRANS_STATE_UNBLOCKED), in
+    which case fs_info->generation was incremented and does not correspond
+    to the committed transaction anymore.
+
+    So fix this by passing a transaction handle to the trace event instead of
+    fs_info. This will also allow later for the trace event to dump other
+    useful information about the transaction.
+
+Upstream-Status: Backport
+
+Change-Id: Icc45cfbe008773565d23b0115d1e86578e6cbfca
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/instrumentation/events/btrfs.h | 13 ++++++++++++-
+ 1 file changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/include/instrumentation/events/btrfs.h b/include/instrumentation/events/btrfs.h
+index 29ee15ed..ee815b68 100644
+--- a/include/instrumentation/events/btrfs.h
++++ b/include/instrumentation/events/btrfs.h
+@@ -55,7 +55,18 @@ struct extent_state;
+ #define lttng_fs_info_fsid fs_info->fsid
+ #endif
+ 
+-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
++#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(7,2,0))
++LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit,
++
++	TP_PROTO(const struct btrfs_trans_handle *trans),
++
++	TP_ARGS(trans),
++
++	TP_FIELDS(
++		ctf_integer(u64, generation, trans->transid)
++	)
++)
++#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+ LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit,
+ 
+ 	TP_PROTO(const struct btrfs_fs_info *fs_info),
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch b/meta/recipes-kernel/lttng/lttng-modules/0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch
new file mode 100644
index 0000000000..549ca21b08
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch
@@ -0,0 +1,41 @@
+From 27f1057933317846d64c1f7a2d83120291b349c2 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 13:53:44 -0400
+Subject: [PATCH 5/7] fix: btrfs: tracepoints: add in_fsync field to
+ transaction commit event (v7.2)
+
+See upstream commit:
+
+  commit 889ad3845a8c029e93a46251f78d61b277cf5e61
+  Author: Filipe Manana <fdmanana@suse.com>
+  Date:   Fri Apr 17 18:12:16 2026 +0100
+
+    btrfs: tracepoints: add in_fsync field to transaction commit event
+
+    Include the in_fsync value from the transaction handle so that we can know
+    if a transaction commit was triggered by a fsync call.
+
+Upstream-Status: Backport
+
+Change-Id: If8c0e00e4e9b0fb066cf784a4a0b8053d298da49
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/instrumentation/events/btrfs.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/include/instrumentation/events/btrfs.h b/include/instrumentation/events/btrfs.h
+index ee815b68..e3527739 100644
+--- a/include/instrumentation/events/btrfs.h
++++ b/include/instrumentation/events/btrfs.h
+@@ -64,6 +64,7 @@ LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit,
+ 
+ 	TP_FIELDS(
+ 		ctf_integer(u64, generation, trans->transid)
++		ctf_integer(bool, in_fsync, trans->in_fsync)
+ 	)
+ )
+ #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch b/meta/recipes-kernel/lttng/lttng-modules/0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch
new file mode 100644
index 0000000000..15b8bc3f8c
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch
@@ -0,0 +1,68 @@
+From dae7dae8b220c38c699bd2971f1b61f4a40e0a5f Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 22 Jun 2026 13:56:42 -0400
+Subject: [PATCH 6/7] fix: btrfs: tracepoints: trace transaction states during
+ commit phase (v7.2)
+
+See upstream commit:
+
+  commit 17819dc282f15d49fac8d7eb94d571e69c22cbdf
+  Author: Filipe Manana <fdmanana@suse.com>
+  Date:   Thu Apr 23 17:05:23 2026 +0100
+
+    btrfs: tracepoints: trace transaction states during commit phase
+
+    Currently the trace event is fired only when a transaction is fully
+    complete (its state is TRANS_STATE_COMPLETED). However during a
+    transaction commit we go through several states and as soon as the
+    state reaches TRANS_STATE_UNBLOCKED, another transaction can start.
+    Therefore it's useful to track every transaction state changed during
+    the commit of a transaction, so that we can see if a new transaction
+    is started before the current one is completed. Add the transaction
+    state to the transaction commit event and call the event everytime
+    we change the transaction state during commit.
+
+Upstream-Status: Backport
+
+Change-Id: I3429d43d73fe8eacf8c25c61b8da8fbd551e71f7
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/instrumentation/events/btrfs.h | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/include/instrumentation/events/btrfs.h b/include/instrumentation/events/btrfs.h
+index e3527739..ee430726 100644
+--- a/include/instrumentation/events/btrfs.h
++++ b/include/instrumentation/events/btrfs.h
+@@ -56,6 +56,19 @@ struct extent_state;
+ #endif
+ 
+ #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(7,2,0))
++LTTNG_TRACEPOINT_ENUM(btrfs_transaction_states,
++
++	TP_ENUM_VALUES(
++		ctf_enum_value("TRANS_STATE_RUNNING", TRANS_STATE_RUNNING)
++		ctf_enum_value("TRANS_STATE_COMMIT_PREP", TRANS_STATE_COMMIT_PREP)
++		ctf_enum_value("TRANS_STATE_COMMIT_START", TRANS_STATE_COMMIT_START)
++		ctf_enum_value("TRANS_STATE_COMMIT_DOING", TRANS_STATE_COMMIT_DOING)
++		ctf_enum_value("TRANS_STATE_UNBLOCKED", TRANS_STATE_UNBLOCKED)
++		ctf_enum_value("TRANS_STATE_SUPER_COMMITTED", TRANS_STATE_SUPER_COMMITTED)
++		ctf_enum_value("TRANS_STATE_COMPLETED", TRANS_STATE_COMPLETED)
++	)
++)
++
+ LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit,
+ 
+ 	TP_PROTO(const struct btrfs_trans_handle *trans),
+@@ -65,6 +78,7 @@ LTTNG_TRACEPOINT_EVENT(btrfs_transaction_commit,
+ 	TP_FIELDS(
+ 		ctf_integer(u64, generation, trans->transid)
+ 		ctf_integer(bool, in_fsync, trans->in_fsync)
++		ctf_enum(btrfs_transaction_states, int, state, trans->transaction->state)
+ 	)
+ )
+ #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch
new file mode 100644
index 0000000000..9382a9898b
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch
@@ -0,0 +1,153 @@
+From 4c818b15fe2f06ce95101c875d9ceedd71b29f5a Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Tue, 23 Jun 2026 13:38:45 -0400
+Subject: [PATCH 7/7] fix: string: Remove strncpy() from the kernel (v7.2)
+
+See upstream commits:
+
+  commit 079a028d6327e68cfa5d38b36123637b321c19a7
+  Author: Kees Cook <kees@kernel.org>
+  Date:   Mon Mar 23 01:27:25 2026 +0000
+
+    string: Remove strncpy() from the kernel
+
+    strncpy() has been a persistent source of bugs due to its ambiguous
+    intended usage and frequently counter-intuitive semantics: it may not
+    NUL-terminate the destination, and it unconditionally zero-pads to the
+    full length, which isn't always needed. All former callers have been
+    migrated[1] to:
+
+      - strscpy()        for NUL-terminated destinations
+      - strscpy_pad()    for NUL-terminated destinations needing zero-padding
+      - strtomem_pad()   for non-NUL-terminated fixed-width fields
+      - memcpy_and_pad() for bounded copies with explicit padding
+      - memcpy()         for known-length copies
+
+    Remove the generic implementation, its declaration, the FORTIFY_SOURCE
+    wrapper, and associated tests.
+
+  commit 458a3bf82df4fe1f951d0f52b1e0c1e9d5a88a3b
+  Author: Tobin C. Harding <tobin@kernel.org>
+  Date:   Fri Apr 5 12:58:58 2019 +1100
+
+    lib/string: Add strscpy_pad() function
+
+    We have a function to copy strings safely and we have a function to copy
+    strings and zero the tail of the destination (if source string is
+    shorter than destination buffer) but we do not have a function to do
+    both at once.  This means developers must write this themselves if they
+    desire this functionality.  This is a chore, and also leaves us open to
+    off by one errors unnecessarily.
+
+    Add a function that calls strscpy() then memset()s the tail to zero if
+    the source string is shorter than the destination buffer.
+
+Upstream-Status: Backport
+
+Change-Id: Ia80045fab7b0a75feedc8301d251584295c1ed4e
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ include/wrapper/string.h | 57 ++++++++++++++++++++++++++++++++++++++++
+ src/lttng-syscalls.c     |  7 +++--
+ 2 files changed, 60 insertions(+), 4 deletions(-)
+ create mode 100644 include/wrapper/string.h
+
+diff --git a/include/wrapper/string.h b/include/wrapper/string.h
+new file mode 100644
+index 00000000..d13b3863
+--- /dev/null
++++ b/include/wrapper/string.h
+@@ -0,0 +1,57 @@
++// SPDX-FileCopyrightText: 2026 Michael Jeanson <mjeanson@efficios.com>
++// SPDX-License-Identifier: GPL-2.0-only
++
++#ifndef _LTTNG_WRAPPER_STRING_H
++#define _LTTNG_WRAPPER_STRING_H
++
++#include <lttng/kernel-version.h>
++#include <linux/string.h>
++
++/**
++ * strscpy_pad() - Copy a C-string into a sized buffer
++ * @dst: Where to copy the string to
++ * @src: Where to copy the string from
++ * @size: Size of destination buffer
++ *
++ * Copy the string, or as much of it as fits, into the dest buffer. The
++ * behavior is undefined if the string buffers overlap. The destination
++ * buffer is always %NUL terminated, unless it's zero-sized.
++ *
++ * If the source string is shorter than the destination buffer, the
++ * remaining bytes in the buffer will be filled with %NUL bytes.
++ *
++ * For full explanation of why you may want to consider using the
++ * 'strscpy' functions please see the function docstring for strscpy().
++ *
++ * Returns:
++ * * The number of characters copied (not including the trailing %NULs)
++ * * -E2BIG if count is 0 or @src was truncated.
++ */
++#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,2,0))
++static inline
++ssize_t lttng_strscpy_pad(char *dst, const char *src, size_t count)
++{
++	return strscpy_pad(dst, src, count);
++}
++#else
++static inline
++ssize_t lttng_strscpy_pad(char *dst, const char *src, size_t count)
++{
++	ssize_t ret;
++
++	if (count == 0)
++		 return -E2BIG;
++
++	strncpy(dst, src, count);
++
++	ret = strnlen(dst, count);
++	if (ret >= count) {
++		dst[count - 1] = '\0';
++		ret = -E2BIG;
++	}
++
++	return ret;
++}
++#endif
++
++#endif /* _LTTNG_WRAPPER_STRING_H */
+diff --git a/src/lttng-syscalls.c b/src/lttng-syscalls.c
+index e24d4c73..d5476a71 100644
+--- a/src/lttng-syscalls.c
++++ b/src/lttng-syscalls.c
+@@ -28,6 +28,7 @@
+ #include <wrapper/rcu.h>
+ #include <wrapper/syscall.h>
+ #include <wrapper/limits.h>
++#include <wrapper/string.h>
+ #include <lttng/events.h>
+ #include <lttng/events-internal.h>
+ #include <lttng/utils.h>
+@@ -609,8 +610,7 @@ void lttng_syscall_event_enabler_create_event(struct lttng_event_enabler_common
+ 			ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT;
+ 			break;
+ 		}
+-		strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
+-		ev.name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0';
++		lttng_strscpy_pad(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN);
+ 		ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
+ 		ev.token = syscall_event_enabler->user_token;
+ 		event_recorder_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev,
+@@ -701,8 +701,7 @@ void lttng_syscall_event_enabler_create_event(struct lttng_event_enabler_common
+ 			ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT;
+ 			break;
+ 		}
+-		strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
+-		ev.name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0';
++		lttng_strscpy_pad(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN);
+ 		ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
+ 		ev.token = syscall_event_enabler->user_token;
+ 		event_counter_enabler = lttng_event_counter_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev,
+-- 
+2.55.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules_2.15.2.bb b/meta/recipes-kernel/lttng/lttng-modules_2.15.2.bb
index bfa1fc619a..3c103ccbb7 100644
--- a/meta/recipes-kernel/lttng/lttng-modules_2.15.2.bb
+++ b/meta/recipes-kernel/lttng/lttng-modules_2.15.2.bb
@@ -16,7 +16,14 @@ inherit upstream-stable-release-point
 include lttng-platforms.inc
 
 SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \
-           "
+    file://0001-fix-x86-msr-Remove-rdmsrl-wrmsrl-v7.2.patch \
+    file://0002-fix-KVM-x86-Rename-kvm_cache_regs.h-regs.h-v7.2.patch \
+    file://0003-fix-net-constify-sk_skb_reason_drop-sock-parameter-v.patch \
+    file://0004-fix-btrfs-tracepoints-pass-a-transaction-handle-to-t.patch \
+    file://0005-fix-btrfs-tracepoints-add-in_fsync-field-to-transact.patch \
+    file://0006-fix-btrfs-tracepoints-trace-transaction-states-durin.patch \
+    file://0007-fix-string-Remove-strncpy-from-the-kernel-v7.2.patch \
+"
 
 # Use :append here so that the patch is applied also when using devupstream
 SRC_URI:append = " file://0001-src-Kbuild-change-missing-CONFIG_TRACEPOINTS-to-warn.patch \
-- 
2.55.0

[PATCH v2 2/4] testexport.bbclass: capture meta/lib/oe

[Mikko Rapeli]

oeqa runtime tests like stap.py depend oe library so capture
it to testexport tar ball so that test environments can run the
test too. Fixes:

2026-08-13 06:44:37,419 - runtime - INFO - ERROR: test_stap (stap.StapTest.test_stap)
2026-08-13 06:44:37,420 - runtime - INFO - ----------------------------------------------------------------------
2026-08-13 06:44:37,420 - runtime - INFO - Traceback (most recent call last):
  File "/lava-downloads/core-image-sato-sdk/meta/lib/oeqa/core/decorator/__init__.py", line 35, in wrapped_f
    return func(*args, **kwargs)
  File "/lava-downloads/core-image-sato-sdk/meta/lib/oeqa/core/decorator/__init__.py", line 35, in wrapped_f
    return func(*args, **kwargs)
  File "/lava-downloads/core-image-sato-sdk/meta/lib/oeqa/core/decorator/__init__.py", line 35, in wrapped_f
    return func(*args, **kwargs)
  [Previous line repeated 1 more time]
  File "/lava-downloads/core-image-sato-sdk/meta/lib/oeqa/runtime/cases/stap.py", line 19, in test_stap
    from oe.utils import parallel_make_value
ModuleNotFoundError: No module named 'oe'

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 meta/classes-recipe/testexport.bbclass | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

v2: no changes

v1: https://lists.openembedded.org/g/openembedded-core/message/243420

diff --git a/meta/classes-recipe/testexport.bbclass b/meta/classes-recipe/testexport.bbclass
index 12b7e17112..adcc36c062 100644
--- a/meta/classes-recipe/testexport.bbclass
+++ b/meta/classes-recipe/testexport.bbclass
@@ -117,9 +117,10 @@ def copy_needed_files(d, tc):
             shutil.copy2(src, dst)
 
     # layer specific files/dirs
-    layer_files_to_copy = [ os.path.join('lib', 'oeqa', 'core'),
-                      os.path.join('lib', 'oeqa', 'runtime'),
+    layer_files_to_copy = [ os.path.join('lib', 'oe'),
+                      os.path.join('lib', 'oeqa', 'core'),
                       os.path.join('lib', 'oeqa', 'files'),
+                      os.path.join('lib', 'oeqa', 'runtime'),
                       os.path.join('lib', 'oeqa', 'utils'),]
     for layer in bblayers:
         meta = os.path.basename(layer)
-- 
2.55.0

[PATCH v2 3/4] kernel-devsrc: copy gen-kernel-hwcaps.sh on arm64

[Mikko Rapeli]

New generator script is needed for arm64 kernel module builds after v7.0-rc4.
Fixes oeqa runtime kernelmodule.py failure on arm64 machines:

  GEN     arch/arm64/include/generated/asm/cpucap-defs.h
make[2]: *** No rule to make target 'arch/arm64/tools/gen-kernel-hwcaps.sh', needed by 'arch/arm64/include/generated/asm/kernel-hwcap.h'.  Stop.
make[1]: *** [arch/arm64/Makefile:199: archprepare] Error 2

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 meta/recipes-kernel/linux/kernel-devsrc.bb | 3 +++
 1 file changed, 3 insertions(+)

v2: no changes

v1: https://lists.openembedded.org/g/openembedded-core/message/243421

diff --git a/meta/recipes-kernel/linux/kernel-devsrc.bb b/meta/recipes-kernel/linux/kernel-devsrc.bb
index a684ee8648..a70399cc95 100644
--- a/meta/recipes-kernel/linux/kernel-devsrc.bb
+++ b/meta/recipes-kernel/linux/kernel-devsrc.bb
@@ -220,6 +220,9 @@ do_install() {
             cp -a --parents arch/arm64/tools/syscall_64.tbl $kerneldir/build/   2>/dev/null || :
             cp -a --parents arch/arm64/tools/syscall_32.tbl $kerneldir/build/   2>/dev/null || :
 
+            # 7.0+
+            cp -a --parents arch/arm64/tools/gen-kernel-hwcaps.sh $kerneldir/build/   2>/dev/null || :
+
             if [ -e $kerneldir/build/arch/arm64/tools/gen-cpucaps.awk ]; then
                  sed -i -e "s,#!.*awk.*,#!${USRBINPATH}/env awk," $kerneldir/build/arch/arm64/tools/gen-cpucaps.awk
             fi
-- 
2.55.0

[PATCH v2 4/4] kernel-devsrc: copy kernel/sched/ext/ext.h

[Mikko Rapeli]

ext.h etc files were moved to new subdir in upstream commit
bba2c3615bd sched_ext: Move sources under kernel/sched/ext/

Fixes oeqa kernelmodule.py failure with 7.2 kernel:

  CC      kernel/sched/rq-offsets.s
In file included from kernel/sched/rq-offsets.c:5:
kernel/sched/sched.h:4214:10: fatal error: ext/ext.h: No such file or directory
 4214 | #include "ext/ext.h"
      |          ^~~~~~~~~~~
compilation terminated.
make[2]: *** [scripts/Makefile.build:184: kernel/sched/rq-offsets.s] Error 1
make[1]: *** [/usr/lib/modules/7.2.0-rc7-yoctodev-standard/build/Makefile:1408: prepare0] Error 2

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
---
 meta/recipes-kernel/linux/kernel-devsrc.bb | 3 +++
 1 file changed, 3 insertions(+)

v2: only copy ext/ext.h not the whole kernel/sched/ext directory since
    this is enough to fix the build issue

v1: https://lists.openembedded.org/g/openembedded-core/message/243422

diff --git a/meta/recipes-kernel/linux/kernel-devsrc.bb b/meta/recipes-kernel/linux/kernel-devsrc.bb
index a70399cc95..4ae121eb62 100644
--- a/meta/recipes-kernel/linux/kernel-devsrc.bb
+++ b/meta/recipes-kernel/linux/kernel-devsrc.bb
@@ -368,6 +368,9 @@ do_install() {
         cp -a --parents kernel/sched/ext.h $kerneldir/build 2>/dev/null || :
         cp -a --parents kernel/workqueue_internal.h $kerneldir/build 2>/dev/null || :
 
+        # 7.1+
+        cp -a --parents kernel/sched/ext/ext.h $kerneldir/build 2>/dev/null || :
+
         if [ "${ARCH}" = "mips" ]; then
             cp -a --parents arch/mips/Kbuild.platforms $kerneldir/build/
             cp --parents $(find -type f -name "Platform") $kerneldir/build
-- 
2.55.0

Re: [OE-core] [PATCH v2 1/4] lttng-modules: fix build with kernel 7.2

[Richard Purdie]

On Mon, 2026-08-17 at 14:21 +0300, Mikko Rapeli via lists.openembedded.org wrote:
> With patches from upstream 2.15 stable branch.
> Fixes build error:
> 
> > lttng-syscalls.c: In function 'lttng_syscall_event_enabler_create_event':
> > lttng-syscalls.c:612:17: error: implicit declaration of function 'strncpy' [-Wimplicit-function-declaration]
> >   612 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> >       |                 ^~~~~~~
> > lttng-syscalls.c:101:1: note: include '<string.h>' or provide a declaration of 'strncpy'
> >   100 | #include <instrumentation/syscalls/syscalls_unknown.h>
> >   +++ |+#include <string.h>
> >   101 | #undef TRACE_SYSTEM
> > lttng-syscalls.c:612:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
> >   612 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> >       |                 ^~~~~~~
> > lttng-syscalls.c:612:17: note: include '<string.h>' or provide a declaration of 'strncpy'
> > lttng-syscalls.c:704:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
> >   704 |                 strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> >       |                 ^~~~~~~
> > lttng-syscalls.c:704:17: note: include '<string.h>' or provide a declaration of 'strncpy'

I think 2.15.3 has released now!

Cheers,

Richard

Re: [OE-core] [PATCH v2 1/4] lttng-modules: fix build with kernel 7.2

[Mikko Rapeli]

Hi,

On Tue, Aug 18, 2026 at 01:21:20PM +0100, Richard Purdie wrote:
> On Mon, 2026-08-17 at 14:21 +0300, Mikko Rapeli via lists.openembedded.org wrote:
> > With patches from upstream 2.15 stable branch.
> > Fixes build error:
> > 
> > > lttng-syscalls.c: In function 'lttng_syscall_event_enabler_create_event':
> > > lttng-syscalls.c:612:17: error: implicit declaration of function 'strncpy' [-Wimplicit-function-declaration]
> > > � 612 |���������������� strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> > > ����� |���������������� ^~~~~~~
> > > lttng-syscalls.c:101:1: note: include '<string.h>' or provide a declaration of 'strncpy'
> > > � 100 | #include <instrumentation/syscalls/syscalls_unknown.h>
> > > � +++ |+#include <string.h>
> > > � 101 | #undef TRACE_SYSTEM
> > > lttng-syscalls.c:612:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
> > > � 612 |���������������� strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> > > ����� |���������������� ^~~~~~~
> > > lttng-syscalls.c:612:17: note: include '<string.h>' or provide a declaration of 'strncpy'
> > > lttng-syscalls.c:704:17: warning: incompatible implicit declaration of built-in function 'strncpy' [-Wbuiltin-declaration-mismatch]
> > > � 704 |���������������� strncpy(ev.name, desc->event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1);
> > > ����� |���������������� ^~~~~~~
> > > lttng-syscalls.c:704:17: note: include '<string.h>' or provide a declaration of 'strncpy'
> 
> I think 2.15.3 has released now!

Right, sent v3 with minor version update. Rest of the patches are already in master-next
so not sending them again.

Cheers,

-Mikko