[PATCH 0/2] Build fixes for liblockdep

[PATCH 0/2] Build fixes for liblockdep

[Ben Hutchings]

[-- Attachment #1: Type: text/plain, Size: 418 bytes --]

In addition to the patch I recently sent for lockdep itself, the
following fixes are also needed to make liblockdep build.

Ben.

Bastian Blank (1):
  liblockdep: Stub NMI watchdog reset

Ben Hutchings (1):
  liblockdep: Stub task_struct::state

 tools/include/linux/lockdep.h |  4 ++++
 tools/include/linux/nmi.h     | 12 ++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 tools/include/linux/nmi.h


[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 811 bytes --]

[PATCH 1/2] liblockdep: Stub NMI watchdog reset

[Ben Hutchings]

[-- Attachment #1: Type: text/plain, Size: 841 bytes --]

From: Bastian Blank <waldi@debian.org>

lockdep.c now includes <linux/nmi.h> and requires touch_nmi_watchdog(),
so provide those for liblockdep.

Fixes: 88f1c87de11a ("locking/lockdep: Avoid triggering hardlockup from ...")
[bwh: Write a longer description]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 tools/include/linux/nmi.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 tools/include/linux/nmi.h

diff --git a/tools/include/linux/nmi.h b/tools/include/linux/nmi.h
new file mode 100644
index 000000000000..81ffb39343cc
--- /dev/null
+++ b/tools/include/linux/nmi.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  linux/include/linux/nmi.h
+ */
+#ifndef LINUX_NMI_H
+#define LINUX_NMI_H
+
+static inline void touch_nmi_watchdog(void)
+{
+}
+
+#endif


[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 811 bytes --]

[PATCH 2/2] liblockdep: Stub task_struct::state

[Ben Hutchings]

[-- Attachment #1: Type: text/plain, Size: 920 bytes --]

lockdep_print_held_locks() now checks task_struct::state.  Define it
so that all tasks are assumed to be running, since we have no
reasonble way to tell in user-space.

Fixes: 8cc05c71ba5f ("locking/lockdep: Move sanity check to inside ...")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 tools/include/linux/lockdep.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/include/linux/lockdep.h b/tools/include/linux/lockdep.h
index 6b0c36a58fcb..8e84609afb04 100644
--- a/tools/include/linux/lockdep.h
+++ b/tools/include/linux/lockdep.h
@@ -31,12 +31,16 @@ struct task_struct {
 	gfp_t lockdep_reclaim_gfp;
 	int pid;
 	char comm[17];
+	long state;
 };
 
 extern struct task_struct *__curr(void);
 
 #define current (__curr())
 
+/* lockdep checks task_struct::state == TASK_RUNNING */
+#define TASK_RUNNING 0
+
 static inline int debug_locks_off(void)
 {
 	return 1;

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 811 bytes --]

[PATCH 1/2] liblockdep: Stub NMI watchdog reset

[Ben Hutchings]

From: Bastian Blank <waldi@debian.org>

lockdep.c now includes <linux/nmi.h> and requires touch_nmi_watchdog(),
so provide those for liblockdep.

Fixes: 88f1c87de11a ("locking/lockdep: Avoid triggering hardlockup from ...")
[bwh: Write a longer description]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 tools/include/linux/nmi.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 tools/include/linux/nmi.h

diff --git a/tools/include/linux/nmi.h b/tools/include/linux/nmi.h
new file mode 100644
index 000000000000..81ffb39343cc
--- /dev/null
+++ b/tools/include/linux/nmi.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  linux/include/linux/nmi.h
+ */
+#ifndef LINUX_NMI_H
+#define LINUX_NMI_H
+
+static inline void touch_nmi_watchdog(void)
+{
+}
+
+#endif