Received-SPF: pass (google.com: domain of linux-kernel+bounces-150411-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Date: Thu, 18 Apr 2024 18:37:52 +0300
From: Mike Rapoport <rppt@kernel.org>
To: Masami Hiramatsu <masami.hiramatsu@gmail.com>
Cc: linux-kernel@vger.kernel.org, Alexandre Ghiti <alexghiti@rivosinc.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	=?iso-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Christophe Leroy <christophe.leroy@csgroup.eu>,
	"David S. Miller" <davem@davemloft.net>,
	Dinh Nguyen <dinguyen@kernel.org>,
	Donald Dutile <ddutile@redhat.com>,
	Eric Chanudet <echanude@redhat.com>,
	Heiko Carstens <hca@linux.ibm.com>, Helge Deller <deller@gmx.de>,
	Huacai Chen <chenhuacai@kernel.org>,
	Kent Overstreet <kent.overstreet@linux.dev>,
	Luis Chamberlain <mcgrof@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nadav Amit <nadav.amit@gmail.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Puranjay Mohan <puranjay12@gmail.com>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Russell King <linux@armlinux.org.uk>, Song Liu <song@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Thomas Gleixner <tglx@linutronix.de>, Will Deacon <will@kernel.org>,
	bpf@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org,
	linux-mm@kvack.org, linux-modules@vger.kernel.org,
	linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev,
	netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH v4 14/15] kprobes: remove dependency on CONFIG_MODULES
Message-ID: <ZiE-UE27NalI-IeW@kernel.org>
References: <20240411160051.2093261-1-rppt@kernel.org>
 <20240411160051.2093261-15-rppt@kernel.org>
 <20240418061615.5fad23b954bf317c029acc4d@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240418061615.5fad23b954bf317c029acc4d@gmail.com>

Hi Masami,

On Thu, Apr 18, 2024 at 06:16:15AM +0900, Masami Hiramatsu wrote:
> Hi Mike,
> 
> On Thu, 11 Apr 2024 19:00:50 +0300
> Mike Rapoport <rppt@kernel.org> wrote:
> 
> > From: "Mike Rapoport (IBM)" <rppt@kernel.org>
> > 
> > kprobes depended on CONFIG_MODULES because it has to allocate memory for
> > code.
> > 
> > Since code allocations are now implemented with execmem, kprobes can be
> > enabled in non-modular kernels.
> > 
> > Add #ifdef CONFIG_MODULE guards for the code dealing with kprobes inside
> > modules, make CONFIG_KPROBES select CONFIG_EXECMEM and drop the
> > dependency of CONFIG_KPROBES on CONFIG_MODULES.
> 
> Thanks for this work, but this conflicts with the latest fix in v6.9-rc4.
> Also, can you use IS_ENABLED(CONFIG_MODULES) instead of #ifdefs in
> function body? We have enough dummy functions for that, so it should
> not make a problem.

I'll rebase and will try to reduce ifdefery where possible.

> Thank you,
> 
> > 
> > Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
> > ---
> >  arch/Kconfig                |  2 +-
> >  kernel/kprobes.c            | 43 +++++++++++++++++++++----------------
> >  kernel/trace/trace_kprobe.c | 11 ++++++++++
> >  3 files changed, 37 insertions(+), 19 deletions(-)
> > 
> 
> -- 
> Masami Hiramatsu

-- 
Sincerely yours,
Mike.