[PATCH] mm/memory-failure: trace: change memory_failure_event to ras subsystem

[Xie Yuanbin]

For historical version, commit 97f0b1345219 ("tracing: add trace event
for memory-failure") introduced memory_failure_event in ras subsystem.
commit 31807483d395 ("mm/memory-failure: remove the selection of RAS")
changed memory_failure_event to memory_failure subsystem. This breaks
the backward compatibility, some user programs rely on it.

Change memory_failure_event to ras subsystem to keep backward
compatibility.

Fixes: 31807483d395 ("mm/memory-failure: remove the selection of RAS")

Reported-by: Yi Lai <yi1.lai@xxxxxxxxx>
Reported-by: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Closes: https://lore.kernel.org/linux-mm/CY8PR11MB7134346A3E4BB28ECA28D6E989132@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Signed-off-by: Xie Yuanbin <xieyuanbin1@xxxxxxxxxx>
---
 include/trace/events/memory-failure.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/trace/events/memory-failure.h b/include/trace/events/memory-failure.h
index aa57cc8f896b..7a8ee5d1a44e 100644
--- a/include/trace/events/memory-failure.h
+++ b/include/trace/events/memory-failure.h
@@ -1,6 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #undef TRACE_SYSTEM
-#define TRACE_SYSTEM memory_failure
+/*
+ * For historical versions, memory_failure_event is in ras subsystem,
+ * some user programs depend on it.
+ */
+#define TRACE_SYSTEM ras
 #define TRACE_INCLUDE_FILE memory-failure
 
 #if !defined(_TRACE_MEMORY_FAILURE_H) || defined(TRACE_HEADER_MULTI_READ)
-- 
2.53.0