linux-kernel - Re: [GIT PULL] Modules updates for v5.13

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Message-ID: <YIqaXbAY9iHrjscS@gunter>
Date:   Thu, 29 Apr 2021 13:37:01 +0200
From:   Jessica Yu <jeyu@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] Modules updates for v5.13

+++ Jessica Yu [28/04/21 14:58 +0200]:
>Hi Linus,
>
>Please pull below to receive modules updates for the v5.13 merge window.
>A summary can be found in the signed tag.
>
>Thank you,
>
>Jessica

Ugh, I had forgotten to sign the tag. Should be fixed now, sorry about that.

>--
>The following changes since commit 1e28eed17697bcf343c6743f0028cc3b5dd88bf0:
>
>  Linux 5.12-rc3 (2021-03-14 14:41:02 -0700)
>
>are available in the Git repository at:
>
>  git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git tags/modules-for-v5.13
>
>for you to fetch changes up to 33121347fb1c359bd6e3e680b9f2c6ced5734a81:
>
>  module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD (2021-03-29 13:08:53 +0200)
>
>----------------------------------------------------------------
>Modules updates for v5.13
>
>Summary of modules changes for the 5.13 merge window:
>
>- Fix an age old bug involving jump_calls and static_labels when
>  CONFIG_MODULE_UNLOAD=n. When CONFIG_MODULE_UNLOAD=n, it means you
>  can't unload modules, so normally the __exit sections of a module are
>  not loaded at all. However, dynamic code patching (jump_label,
>  static_call, alternatives) can have sites in __exit sections even if
>  __exit is never executed.
>
>  Reported by Peter Zijlstra: "Alternatives, jump_labels and static_call
>  all can have relocations into __exit code.  Not loading it at all would
>  be BAD." Therefore, load the __exit sections even when
>  CONFIG_MODULE_UNLOAD=n, and discard them after init.
>
>Signed-off-by: Jessica Yu <jeyu@...nel.org>
>
>----------------------------------------------------------------
>Jessica Yu (1):
>      module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD
>
> kernel/module.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)