linux-kernel - Re: [PATCH v2 1/2] kprobes: Allow architectures to override optinsn page allocation

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Date:   Thu, 20 May 2021 14:48:12 +0530
From:   "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>
To:     anil.s.keshavamurthy@...el.com,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        davem@...emloft.net, mhiramat@...nel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>
Cc:     clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 1/2] kprobes: Allow architectures to override optinsn
 page allocation

Christophe Leroy wrote:
> Some architectures like powerpc require a non standard
> allocation of optinsn page, because module pages are
> too far from the kernel for direct branches.
> 
> Define weak alloc_optinsn_page() and free_optinsn_page(), that
> fall back on alloc_insn_page() and free_insn_page() when not
> overriden by the architecture.
  ^^^^^^^^^
  overridden - courtesy of checkpatch.

> 
> Suggested-by: Masami Hiramatsu <mhiramat@...nel.org>
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
> Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
> v2: Added missing prototypes in linux/kprobes.h
> ---
>  include/linux/kprobes.h |  3 +++
>  kernel/kprobes.c        | 14 ++++++++++++--
>  2 files changed, 15 insertions(+), 2 deletions(-)

LGTM. For the series:
Reviewed-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>


- Naveen