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-rw-r--r--poky/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch67
1 files changed, 67 insertions, 0 deletions
diff --git a/poky/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch b/poky/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch
new file mode 100644
index 000000000..a0b870486
--- /dev/null
+++ b/poky/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch
@@ -0,0 +1,67 @@
+From f419315f28a1da656c4faa8a852a2928ce38c72d Mon Sep 17 00:00:00 2001
+From: Ovidiu Panait <ovidiu.panait@windriver.com>
+Date: Thu, 14 May 2020 14:27:17 +0300
+Subject: [PATCH 4/4] Update: Use vmalloc_sync_mappings for stable kernels
+
+Starting from v5.4.28/v5.2.37/v4.19.113/v4.14.175/v4.9.218/v4.4.218, stable
+kernel branches backported v5.6 upstream commit [1], causing the following
+warnings:
+...
+[ 483.242037] LTTng: vmalloc_sync_all symbol lookup failed.
+[ 483.257056] Page fault handler and NMI tracing might trigger faults.
+...
+
+Extend check for vmalloc_sync_mappings for stable kernels as well.
+
+[1] https://github.com/torvalds/linux/commit/763802b53a427ed3cbd419dbba255c414fdd9e7c
+
+[ Edit: minor coding style fix by Mathieu Desnoyers. ]
+
+Upstream-Status: Backport [https://github.com/lttng/lttng-modules/commit/5939591f87dc291bc858caf72decfb8569d802e3]
+
+Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
+---
+ wrapper/vmalloc.h | 17 +++++++++++++++--
+ 1 file changed, 15 insertions(+), 2 deletions(-)
+
+diff --git a/wrapper/vmalloc.h b/wrapper/vmalloc.h
+index d905f60..c7538ae 100644
+--- a/wrapper/vmalloc.h
++++ b/wrapper/vmalloc.h
+@@ -20,8 +20,15 @@
+
+ #include <linux/kallsyms.h>
+ #include <wrapper/kallsyms.h>
++#include <lttng-kernel-version.h>
+
+-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
++ || LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
++ || LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
++ || LTTNG_KERNEL_RANGE(4,19,113, 4,20,0) \
++ || LTTNG_KERNEL_RANGE(4,14,175, 4,15,0) \
++ || LTTNG_KERNEL_RANGE(4,9,218, 4,10,0) \
++ || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0))
+
+ static inline
+ void wrapper_vmalloc_sync_mappings(void)
+@@ -72,7 +79,13 @@ void wrapper_vmalloc_sync_mappings(void)
+
+ #else
+
+-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
++ || LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
++ || LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
++ || LTTNG_KERNEL_RANGE(4,19,113, 4,20,0) \
++ || LTTNG_KERNEL_RANGE(4,14,175, 4,15,0) \
++ || LTTNG_KERNEL_RANGE(4,9,218, 4,10,0) \
++ || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0))
+
+ static inline
+ void wrapper_vmalloc_sync_mappings(void)
+--
+2.17.1
+