linux-kernel - Re: [PATCH v2 12/12] kprobes: remove dependcy on CONFIG

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Message-ID: <87r0qbmy14.fsf@all.your.base.are.belong.to.us>
Date:   Fri, 16 Jun 2023 13:44:55 +0200
From:   Björn Töpel <bjorn@...nel.org>
To:     Mike Rapoport <rppt@...nel.org>, linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "David S. Miller" <davem@...emloft.net>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Helge Deller <deller@....de>,
        Huacai Chen <chenhuacai@...nel.org>,
        Kent Overstreet <kent.overstreet@...ux.dev>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mike Rapoport <rppt@...nel.org>,
        Nadav Amit <nadav.amit@...il.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Puranjay Mohan <puranjay12@...il.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Russell King <linux@...linux.org.uk>,
        Song Liu <song@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>, bpf@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
        linux-mm@...ck.org, linux-modules@...r.kernel.org,
        linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org,
        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 v2 12/12] kprobes: remove dependcy on CONFIG_MODULES

Mike Rapoport <rppt@...nel.org> writes:

> From: "Mike Rapoport (IBM)" <rppt@...nel.org>
>
> kprobes depended on CONFIG_MODULES because it has to allocate memory for
> code.

I think you can remove the MODULES dependency from BPF_JIT as well:

--8<--
diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index 2dfe1079f772..fa4587027f8b 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -41,7 +41,6 @@ config BPF_JIT
        bool "Enable BPF Just In Time compiler"
        depends on BPF
        depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
-       depends on MODULES
        help
          BPF programs are normally handled by a BPF interpreter. This option
          allows the kernel to generate native code when a program is loaded
--8<--


Björn