linux-kernel - Re: [PATCH v3 1/4] s390/unwind: drop unnecessary code around calling ftrace_graph_ret

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Date:   Thu, 28 Nov 2019 17:51:47 +0100
From:   Vasily Gorbik <gor@...ux.ibm.com>
To:     Miroslav Benes <mbenes@...e.cz>
Cc:     heiko.carstens@...ibm.com, borntraeger@...ibm.com,
        jpoimboe@...hat.com, joe.lawrence@...hat.com,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        jikos@...nel.org, pmladek@...e.com, nstange@...e.de,
        live-patching@...r.kernel.org
Subject: Re: [PATCH v3 1/4] s390/unwind: drop unnecessary code around calling
 ftrace_graph_ret_addr()

On Wed, Nov 06, 2019 at 10:55:58AM +0100, Miroslav Benes wrote:
> The current code around calling ftrace_graph_ret_addr() is ifdeffed and
> also tests if ftrace redirection is present on stack.
> ftrace_graph_ret_addr() however performs the test internally and there
> is a version for !CONFIG_FUNCTION_GRAPH_TRACER as well. The unnecessary
> code can thus be dropped.
> 
> Signed-off-by: Miroslav Benes <mbenes@...e.cz>
> ---
>  arch/s390/kernel/unwind_bc.c | 16 ++++------------
>  1 file changed, 4 insertions(+), 12 deletions(-)

This patch has been picked up from v2 already. It's in Linus tree.