linux-kernel - Re: [PATCH 02/13] module: add a module

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Message-ID: <844a7fc3-2cba-46d2-fd4e-e5fe16b08573@csgroup.eu>
Date:   Thu, 21 Jan 2021 11:00:20 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Christoph Hellwig <hch@....de>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Jessica Yu <jeyu@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jiri Kosina <jikos@...nel.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Petr Mladek <pmladek@...e.com>,
        Joe Lawrence <joe.lawrence@...hat.com>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        linux-kbuild@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        live-patching@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 02/13] module: add a module_loaded helper




Le 21/01/2021 à 08:49, Christoph Hellwig a écrit :
 > Add a helper that takes modules_mutex and uses find_module to check if a
 > given module is loaded.  This provides a better abstraction for the two
 > callers, and allows to unexport modules_mutex and find_module.
 >
 > Signed-off-by: Christoph Hellwig <hch@....de>
 > ---
 >   drivers/gpu/drm/drm_fb_helper.c |  7 +------
 >   include/linux/module.h          |  3 +++
 >   kernel/module.c                 | 14 ++++++++++++--
 >   kernel/trace/trace_kprobe.c     |  4 +---
 >   4 files changed, 17 insertions(+), 11 deletions(-)
 >

 > diff --git a/include/linux/module.h b/include/linux/module.h
 > index 7a0bcb5b1ffccd..b4654f8a408134 100644
 > --- a/include/linux/module.h
 > +++ b/include/linux/module.h
 > @@ -589,6 +589,9 @@ static inline bool within_module(unsigned long addr, const struct module *mod)
 >   /* Search for module by name: must hold module_mutex. */
 >   struct module *find_module(const char *name);
 >   +/* Check if a module is loaded. */
 > +bool module_loaded(const char *name);

Maybe module_is_loaded() would be a better name.