Subject: [PATCH v3 3/7] arm64: ftrace: fix a stack tracer's output under function graph tracer

From: [email-masked] (AKASHI Takahiro)
Date: Wed, 14 Oct 2015 14:03:50 +0900

On 10/14/2015 12:24 AM, Jungseok Lee wrote:
> On Oct 8, 2015, at 7:01 PM, AKASHI Takahiro wrote:
>
> Hi Akashi,
>
>> Function graph tracer modifies a return address (LR) in a stack frame
>> to hook a function return. This will result in many useless entries
>> (return_to_handler) showing up in a stack tracer's output.
>>
>> This patch replaces such entries with originals values preserved in
>> current->ret_stack[].
>>
>> Signed-off-by: AKASHI Takahiro <[email-masked]>
>
> The following diff should be folded into this patch, not [7/7] one, to
> address build breakage.

Thanks.
I fixed all the build errors reported by kbuild test robot.

-Takahiro AKASHI

> ----8<----
> diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
> index 407991b..7126d4d 100644
> --- a/arch/arm64/kernel/stacktrace.c
> +++ b/arch/arm64/kernel/stacktrace.c
> @@ -17,6 +17,7 @@
>    */
>   #include <linux/kernel.h>
>   #include <linux/export.h>
> +#include <linux/ftrace.h>
>   #include <linux/sched.h>
>   #include <linux/stacktrace.h>
> ----8<----
>
> Best Regards
> Jungseok Lee
>