lttng-modules: backport patches from 2.12.x to fix 5.4.64+ and 5.8.9+ builds

Backporting the 10 patches since the lttng 2.12.2 release. We'll drop
them once .3 is released, but for now, we need the fixes to build
against the latest 5.4, 5.8 and 5.9 kernels.

We also bump the devupstream SRCREV to pickup the same changes.

(From OE-Core rev: 62c87d1a68c4f7c8f30c3c5330dcda9cbcbbbaa7)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/meta/recipes-kernel/lttng/lttng-modules/0007-fix-writeback-Drop-I_DIRTY_TIME_EXPIRE-v5.9.patch b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-writeback-Drop-I_DIRTY_TIME_EXPIRE-v5.9.patch
new file mode 100644
index 0000000000..2843c9cb62
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-writeback-Drop-I_DIRTY_TIME_EXPIRE-v5.9.patch
@@ -0,0 +1,59 @@
+From eae02feb58064eee5ce15a9f6bdffd107c47da05 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 31 Aug 2020 11:41:38 -0400
+Subject: [PATCH 07/10] fix: writeback: Drop I_DIRTY_TIME_EXPIRE (v5.9)
+
+See upstream commit:
+
+  commit 5fcd57505c002efc5823a7355e21f48dd02d5a51
+  Author: Jan Kara <jack@suse.cz>
+  Date:   Fri May 29 16:24:43 2020 +0200
+
+    writeback: Drop I_DIRTY_TIME_EXPIRE
+
+    The only use of I_DIRTY_TIME_EXPIRE is to detect in
+    __writeback_single_inode() that inode got there because flush worker
+    decided it's time to writeback the dirty inode time stamps (either
+    because we are syncing or because of age). However we can detect this
+    directly in __writeback_single_inode() and there's no need for the
+    strange propagation with I_DIRTY_TIME_EXPIRE flag.
+
+Upstream-Status: Backport
+
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+Change-Id: I92e37c2ff3ec36d431e8f9de5c8e37c5a2da55ea
+---
+ instrumentation/events/lttng-module/writeback.h | 16 +++++++++++++++-
+ 1 file changed, 15 insertions(+), 1 deletion(-)
+
+diff --git a/instrumentation/events/lttng-module/writeback.h b/instrumentation/events/lttng-module/writeback.h
+index affb4eb..ece67ad 100644
+--- a/instrumentation/events/lttng-module/writeback.h
++++ b/instrumentation/events/lttng-module/writeback.h
+@@ -46,7 +46,21 @@ static inline struct backing_dev_info *lttng_inode_to_bdi(struct inode *inode)
+ 
+ #endif
+ 
+-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0))
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0))
++#define show_inode_state(state)                                        \
++       __print_flags(state, "|",                               \
++               {I_DIRTY_SYNC,          "I_DIRTY_SYNC"},        \
++               {I_DIRTY_DATASYNC,      "I_DIRTY_DATASYNC"},    \
++               {I_DIRTY_PAGES,         "I_DIRTY_PAGES"},       \
++               {I_NEW,                 "I_NEW"},               \
++               {I_WILL_FREE,           "I_WILL_FREE"},         \
++               {I_FREEING,             "I_FREEING"},           \
++               {I_CLEAR,               "I_CLEAR"},             \
++               {I_SYNC,                "I_SYNC"},              \
++               {I_DIRTY_TIME,          "I_DIRTY_TIME"},        \
++               {I_REFERENCED,          "I_REFERENCED"}         \
++       )
++#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0))
+ #define show_inode_state(state)                                        \
+        __print_flags(state, "|",                               \
+                {I_DIRTY_SYNC,          "I_DIRTY_SYNC"},        \
+-- 
+2.19.1
+