linux-kernel - Re: [PATCH v2] arch/riscv: Enable kprobes when CONFIG

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Message-Id: <D032IFOPKJI8.3TKDPQQI9I6LG@kernel.org>
Date: Mon, 25 Mar 2024 21:11:56 +0200
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Jarkko Sakkinen" <jarkko@...nel.org>, "Masami Hiramatsu"
 <mhiramat@...nel.org>
Cc: <linux-riscv@...ts.infradead.org>, "Paul Walmsley"
 <paul.walmsley@...ive.com>, "Palmer Dabbelt" <palmer@...belt.com>, "Albert
 Ou" <aou@...s.berkeley.edu>, <linux-kernel@...r.kernel.org>, "Naveen N .
 Rao" <naveen.n.rao@...ux.ibm.com>, "Anil S Keshavamurthy"
 <anil.s.keshavamurthy@...el.com>, "David S . Miller" <davem@...emloft.net>,
 <linux-trace-kernel@...r.kernel.org>, "Calvin Owens"
 <jcalvinowens@...il.com>
Subject: Re: [PATCH v2] arch/riscv: Enable kprobes when CONFIG_MODULES=n

On Mon Mar 25, 2024 at 8:37 PM EET, Jarkko Sakkinen wrote:
> > You also should consider using IS_ENABLED(CONFIG_MODULE) in the code to
> > avoid using #ifdefs.

Hmm... I need make a couple of remarks but open for feedback ofc.

First, trace_kprobe_module_exist depends on find_module()

Second, there is a notifier callback that heavily binds to the module
subsystem.

In both cases using IS_ENABLED would emit a lot of compilation errors.

BR, Jarkko