linux-kernel - Re: [PATCH v8 13/17] x86/ftrace: enable dynamic ftrace without CONFIG

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Date: Mon, 6 May 2024 14:22:40 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: linux-kernel@...r.kernel.org, Alexandre Ghiti <alexghiti@...osinc.com>,
 Andrew Morton <akpm@...ux-foundation.org>, Björn Töpel
 <bjorn@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Christophe
 Leroy <christophe.leroy@...roup.eu>, "David S. Miller"
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 <linux@...linux.org.uk>, Sam Ravnborg <sam@...nborg.org>, Song Liu
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 Gleixner <tglx@...utronix.de>, Will Deacon <will@...nel.org>,
 bpf@...r.kernel.org, linux-arch@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
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 linux-s390@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev,
 netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v8 13/17] x86/ftrace: enable dynamic ftrace without
 CONFIG_MODULES

On Sun,  5 May 2024 17:25:56 +0300
Mike Rapoport <rppt@...nel.org> wrote:

> From: "Mike Rapoport (IBM)" <rppt@...nel.org>
> 
> Dynamic ftrace must allocate memory for code and this was impossible
> without CONFIG_MODULES.
> 
> With execmem separated from the modules code, execmem_text_alloc() is
> available regardless of CONFIG_MODULES.
> 
> Remove dependency of dynamic ftrace on CONFIG_MODULES and make
> CONFIG_DYNAMIC_FTRACE select CONFIG_EXECMEM in Kconfig.
> 
> Signed-off-by: Mike Rapoport (IBM) <rppt@...nel.org>
> ---
>  arch/x86/Kconfig         |  1 +
>  arch/x86/kernel/ftrace.c | 10 ----------
>  2 files changed, 1 insertion(+), 10 deletions(-)

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>

-- Steve