On 2015/5/20 14:09, Naoya Horiguchi wrote:

On Wed, May 20, 2015 at 01:41:57PM +0800, Xie XiuQi wrote:
...

quoted

Hi Naoya,

This patch will introduce another build error with attched config file.

drivers/built-in.o:(__tracepoints+0x500): multiple definition of `__tracepoint_aer_event'
mm/built-in.o:(__tracepoints+0x398): first defined here
drivers/built-in.o:(__tracepoints+0x4ec): multiple definition of `__tracepoint_memory_failure_event'
mm/built-in.o:(__tracepoints+0x384): first defined here
drivers/built-in.o:(__tracepoints+0x514): multiple definition of `__tracepoint_mc_event'
mm/built-in.o:(__tracepoints+0x3ac): first defined here
drivers/built-in.o:(__tracepoints+0x528): multiple definition of `__tracepoint_extlog_mem_event'
mm/built-in.o:(__tracepoints+0x3c0): first defined here
make: *** [vmlinux] Error 1

Is this one better?

Yes, thank you for digging.
I posted exactly the same patch just miniutes ago, but yours is a bit
earlier than mine, so you take the authorship :)

Thanks ;-)

quoted

---
From 99d91a901142b17287432b00169ac6bd9d87b489 Mon Sep 17 00:00:00 2001
From: Xie XiuQi <redacted>
Date: Thu, 21 May 2015 13:11:38 +0800
Subject: [PATCH] tracing: fix build error in mm/memory-failure.c

next-20150515 fails to build on i386 with the following error:

mm/built-in.o: In function `action_result':
memory-failure.c:(.text+0x344a5): undefined reference to `__tracepoint_memory_failure_event'
memory-failure.c:(.text+0x344d5): undefined reference to `__tracepoint_memory_failure_event'
memory-failure.c:(.text+0x3450c): undefined reference to `__tracepoint_memory_failure_event'

trace_memory_failure_event depends on CONFIG_RAS,
so add 'select RAS' in mm/Kconfig to avoid this error.

Reported-by: Randy Dunlap <redacted>
Reported-by: Jim Davis <redacted>
Cc: Naoya Horiguchi <redacted>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Chen Gong <redacted>
Signed-off-by: Xie XiuQi <redacted>

Acked-by: Naoya Horiguchi <redacted>

Thanks,
Naoya
.