From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andi Kleen <ak@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Jessica Yu <jeyu@kernel.org>,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
"David S. Miller" <davem@davemloft.net>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>
Subject: Re: [PATCH v5 1/6] kprobes: Remove dependency to the module_mutex
Date: Sat, 25 Jul 2020 05:36:33 +0300 [thread overview]
Message-ID: <20200725023633.GC17052@linux.intel.com> (raw)
In-Reply-To: <20200724091319.GA517988@gmail.com>
On Fri, Jul 24, 2020 at 11:13:19AM +0200, Ingo Molnar wrote:
>
> * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> wrote:
>
> > Add lock_modules() and unlock_modules() wrappers for acquiring module_mutex
> > in order to remove the compile time dependency to it.
> >
> > Cc: linux-mm@kvack.org
> > Cc: Andi Kleen <ak@linux.intel.com>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Suggested-by: Masami Hiramatsu <mhiramat@kernel.org>
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > ---
> > include/linux/module.h | 18 ++++++++++++++++++
> > kernel/kprobes.c | 4 ++--
> > kernel/trace/trace_kprobe.c | 4 ++--
> > 3 files changed, 22 insertions(+), 4 deletions(-)
> >
> > diff --git a/include/linux/module.h b/include/linux/module.h
> > index 2e6670860d27..8850b9692b8f 100644
> > --- a/include/linux/module.h
> > +++ b/include/linux/module.h
> > @@ -705,6 +705,16 @@ static inline bool is_livepatch_module(struct module *mod)
> > bool is_module_sig_enforced(void);
> > void set_module_sig_enforced(void);
> >
> > +static inline void lock_modules(void)
> > +{
> > + mutex_lock(&module_mutex);
> > +}
> > +
> > +static inline void unlock_modules(void)
> > +{
> > + mutex_unlock(&module_mutex);
> > +}
> > +
> > #else /* !CONFIG_MODULES... */
> >
> > static inline struct module *__module_address(unsigned long addr)
> > @@ -852,6 +862,14 @@ void *dereference_module_function_descriptor(struct module *mod, void *ptr)
> > return ptr;
> > }
> >
> > +static inline void lock_modules(void)
> > +{
> > +}
> > +
> > +static inline void unlock_modules(void)
> > +{
> > +}
>
> Minor namespace nit: when introducing new locking wrappers please
> standardize on the XYZ_lock()/XYZ_unlock() nomenclature, i.e.:
>
> modules_lock()
> ...
> modules_unlock()
>
> Similarly to the mutex_lock/unlock(&module_mutex) API that it is
> wrapping.
>
> Also, JFYI, the overwhelming majority of the modules related APIs use
> module_*(), i.e. singular - not plural, so
> module_lock()/module_unlock() would be the more canonical choice.
> (But both sound fine to me)
Thanks, I renamed them as module_lock() and module_unlock().
> Thanks,
>
> Ingo
/Jarkko
next prev parent reply other threads:[~2020-07-25 2:36 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-24 5:05 [PATCH v5 0/6] arch/x86: kprobes: Remove MODULES dependency Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 1/6] kprobes: Remove dependency to the module_mutex Jarkko Sakkinen
2020-07-24 9:13 ` Ingo Molnar
2020-07-25 2:36 ` Jarkko Sakkinen [this message]
2020-07-24 9:17 ` Ingo Molnar
2020-07-25 3:01 ` Jarkko Sakkinen
2020-07-25 10:21 ` Ingo Molnar
2020-07-28 7:34 ` Masami Hiramatsu
2020-08-17 21:22 ` Jarkko Sakkinen
2020-07-24 10:22 ` Mike Rapoport
2020-07-25 2:42 ` Jarkko Sakkinen
2020-07-24 14:46 ` Masami Hiramatsu
2020-07-25 2:48 ` Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 2/6] vmalloc: Add text_alloc() and text_free() Jarkko Sakkinen
2020-07-24 10:22 ` Mike Rapoport
2020-07-25 2:20 ` Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 3/6] arch/x86: Implement " Jarkko Sakkinen
2020-07-24 9:22 ` Ingo Molnar
2020-07-25 2:03 ` Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 4/6] arch/x86: kprobes: Use " Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 5/6] " Jarkko Sakkinen
2020-07-24 9:27 ` Ingo Molnar
2020-07-24 12:16 ` Ard Biesheuvel
2020-07-25 3:19 ` [PATCH v5 5/6] kprobes: Use text_alloc() and text_free()] Jarkko Sakkinen
2020-07-25 3:16 ` [PATCH v5 5/6] kprobes: Use text_alloc() and text_free() Jarkko Sakkinen
2020-07-26 8:14 ` Mike Rapoport
2020-07-26 16:06 ` Ard Biesheuvel
2020-07-28 8:17 ` Masami Hiramatsu
2020-07-28 10:56 ` Ard Biesheuvel
2020-07-28 13:35 ` Masami Hiramatsu
2020-07-28 17:51 ` Ard Biesheuvel
2020-07-29 1:50 ` Masami Hiramatsu
2020-07-29 6:13 ` Ard Biesheuvel
2020-07-30 1:09 ` Masami Hiramatsu
2020-08-18 5:30 ` Jarkko Sakkinen
2020-08-18 11:51 ` Mike Rapoport
2020-08-18 16:30 ` Jarkko Sakkinen
2020-08-19 6:47 ` Mike Rapoport
2020-08-19 21:07 ` Jarkko Sakkinen
2020-07-24 10:27 ` Mike Rapoport
2020-07-24 14:57 ` Masami Hiramatsu
2020-07-24 23:38 ` Jarkko Sakkinen
2020-07-24 5:05 ` [PATCH v5 6/6] kprobes: Remove CONFIG_MODULES dependency Jarkko Sakkinen
2020-07-24 7:01 ` [PATCH v5 0/6] arch/x86: kprobes: Remove MODULES dependency Jarkko Sakkinen
2020-07-24 10:26 ` Mike Rapoport
-- strict thread matches above, loose matches on Subject: below --
2020-07-24 5:04 Jarkko Sakkinen
2020-07-24 5:04 ` [PATCH v5 1/6] kprobes: Remove dependency to the module_mutex Jarkko Sakkinen
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