From: Steven Rostedt <rostedt@goodmis.org>
To: John Ogness <john.ogness@linutronix.de>
Cc: Andrea Parri <parri.andrea@gmail.com>,
Petr Mladek <pmladek@suse.com>,
kbuild-all@lists.01.org, kernel test robot <lkp@intel.com>,
Paul McKenney <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Subject: Re: [RFC PATCH] printk: _printk_rb_static_dict can be static
Date: Fri, 19 Jun 2020 08:29:19 -0400 [thread overview]
Message-ID: <20200619082919.5d604e58@oasis.local.home> (raw)
In-Reply-To: <871rmbim8e.fsf@vostro.fn.ogness.net>
On Fri, 19 Jun 2020 08:49:21 +0200
John Ogness <john.ogness@linutronix.de> wrote:
> > +++ b/kernel/printk/printk.c
> > @@ -434,7 +434,7 @@ static u32 log_buf_len = __LOG_BUF_LEN;
> > */
> > #define PRB_AVGBITS 5 /* 32 character average length */
> >
> > -_DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > +static _DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > PRB_AVGBITS, PRB_AVGBITS, &__log_buf[0]);
>
> _DECLARE_PRINTKRB declares multiple variables, so this patch will not
> work as intended. I would like to declare the variables static but am
> not sure how best to go about it.
>
> In the Linux source I see examples of macros just desclaring the
> variables static. And I see examples of the macros providing a parameter
> where the "static" keyword can be specified.
>
> Since the ringbuffer was created exclusively to serve printk, I would
> prefer to just have _DECLARE_PRINTKRB (and DECLARE_PRINTKRB) declare all
> the variables as static.
Haven written macros that do such things, I agree with your last
statement. Just have the macro declare all the variables static.
-- Steve
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WARNING: multiple messages have this Message-ID (diff)
From: Steven Rostedt <rostedt@goodmis.org>
To: kbuild-all@lists.01.org
Subject: Re: [RFC PATCH] printk: _printk_rb_static_dict can be static
Date: Fri, 19 Jun 2020 08:29:19 -0400 [thread overview]
Message-ID: <20200619082919.5d604e58@oasis.local.home> (raw)
In-Reply-To: <871rmbim8e.fsf@vostro.fn.ogness.net>
[-- Attachment #1: Type: text/plain, Size: 1189 bytes --]
On Fri, 19 Jun 2020 08:49:21 +0200
John Ogness <john.ogness@linutronix.de> wrote:
> > +++ b/kernel/printk/printk.c
> > @@ -434,7 +434,7 @@ static u32 log_buf_len = __LOG_BUF_LEN;
> > */
> > #define PRB_AVGBITS 5 /* 32 character average length */
> >
> > -_DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > +static _DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > PRB_AVGBITS, PRB_AVGBITS, &__log_buf[0]);
>
> _DECLARE_PRINTKRB declares multiple variables, so this patch will not
> work as intended. I would like to declare the variables static but am
> not sure how best to go about it.
>
> In the Linux source I see examples of macros just desclaring the
> variables static. And I see examples of the macros providing a parameter
> where the "static" keyword can be specified.
>
> Since the ringbuffer was created exclusively to serve printk, I would
> prefer to just have _DECLARE_PRINTKRB (and DECLARE_PRINTKRB) declare all
> the variables as static.
Haven written macros that do such things, I agree with your last
statement. Just have the macro declare all the variables static.
-- Steve
WARNING: multiple messages have this Message-ID (diff)
From: Steven Rostedt <rostedt@goodmis.org>
To: John Ogness <john.ogness@linutronix.de>
Cc: kernel test robot <lkp@intel.com>, Petr Mladek <pmladek@suse.com>,
kbuild-all@lists.01.org, Peter Zijlstra <peterz@infradead.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrea Parri <parri.andrea@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Paul McKenney <paulmck@kernel.org>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] printk: _printk_rb_static_dict can be static
Date: Fri, 19 Jun 2020 08:29:19 -0400 [thread overview]
Message-ID: <20200619082919.5d604e58@oasis.local.home> (raw)
In-Reply-To: <871rmbim8e.fsf@vostro.fn.ogness.net>
On Fri, 19 Jun 2020 08:49:21 +0200
John Ogness <john.ogness@linutronix.de> wrote:
> > +++ b/kernel/printk/printk.c
> > @@ -434,7 +434,7 @@ static u32 log_buf_len = __LOG_BUF_LEN;
> > */
> > #define PRB_AVGBITS 5 /* 32 character average length */
> >
> > -_DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > +static _DECLARE_PRINTKRB(printk_rb_static, CONFIG_LOG_BUF_SHIFT - PRB_AVGBITS,
> > PRB_AVGBITS, PRB_AVGBITS, &__log_buf[0]);
>
> _DECLARE_PRINTKRB declares multiple variables, so this patch will not
> work as intended. I would like to declare the variables static but am
> not sure how best to go about it.
>
> In the Linux source I see examples of macros just desclaring the
> variables static. And I see examples of the macros providing a parameter
> where the "static" keyword can be specified.
>
> Since the ringbuffer was created exclusively to serve printk, I would
> prefer to just have _DECLARE_PRINTKRB (and DECLARE_PRINTKRB) declare all
> the variables as static.
Haven written macros that do such things, I agree with your last
statement. Just have the macro declare all the variables static.
-- Steve
next prev parent reply other threads:[~2020-06-19 12:29 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-18 14:49 [PATCH v3 0/3] printk: replace ringbuffer John Ogness
2020-06-18 14:49 ` John Ogness
2020-06-18 14:49 ` [PATCH v3 1/3] crash: add VMCOREINFO macro to define offset in a struct declared by typedef John Ogness
2020-06-18 14:49 ` John Ogness
2020-06-24 8:49 ` Petr Mladek
2020-06-24 8:49 ` Petr Mladek
2020-07-04 9:30 ` Baoquan He
2020-07-04 9:30 ` Baoquan He
2020-06-18 14:49 ` [PATCH v3 2/3] printk: add lockless ringbuffer John Ogness
2020-06-18 14:49 ` John Ogness
2020-06-29 15:32 ` Paul E. McKenney
2020-06-29 15:32 ` Paul E. McKenney
2020-07-02 8:35 ` Petr Mladek
2020-07-02 8:35 ` Petr Mladek
2020-06-18 14:49 ` [PATCH v3 3/3] printk: use the " John Ogness
2020-06-18 14:49 ` John Ogness
2020-06-18 18:23 ` kernel test robot
2020-06-18 18:23 ` kernel test robot
2020-06-18 18:23 ` kernel test robot
2020-06-18 18:23 ` [RFC PATCH] printk: _printk_rb_static_dict can be static kernel test robot
2020-06-18 18:23 ` kernel test robot
2020-06-18 18:23 ` kernel test robot
2020-06-19 6:49 ` John Ogness
2020-06-19 6:49 ` John Ogness
2020-06-19 6:49 ` John Ogness
2020-06-19 12:29 ` Steven Rostedt [this message]
2020-06-19 12:29 ` Steven Rostedt
2020-06-19 12:29 ` Steven Rostedt
2020-06-25 8:16 ` truncate dict: was: Re: [PATCH v3 3/3] printk: use the lockless ringbuffer Petr Mladek
2020-06-25 8:16 ` Petr Mladek
2020-06-26 13:48 ` John Ogness
2020-06-26 13:48 ` John Ogness
2020-06-25 8:28 ` buffer allocation: was: " Petr Mladek
2020-06-25 8:28 ` Petr Mladek
2020-06-26 15:02 ` John Ogness
2020-06-26 15:02 ` John Ogness
2020-06-29 14:04 ` Petr Mladek
2020-06-29 14:04 ` Petr Mladek
2020-06-29 21:57 ` John Ogness
2020-06-29 21:57 ` John Ogness
2020-07-02 13:27 ` Petr Mladek
2020-07-02 13:27 ` Petr Mladek
2020-06-25 12:09 ` record_printk_text tricks: " Petr Mladek
2020-06-25 12:09 ` Petr Mladek
2020-06-25 15:25 ` Petr Mladek
2020-06-25 15:25 ` Petr Mladek
2020-06-26 23:25 ` John Ogness
2020-06-26 23:25 ` John Ogness
2020-06-25 15:17 ` pending output optimization: " Petr Mladek
2020-06-25 15:17 ` Petr Mladek
2020-07-01 19:58 ` John Ogness
2020-07-01 19:58 ` John Ogness
2020-06-25 15:20 ` syslog size unread: " Petr Mladek
2020-06-25 15:20 ` Petr Mladek
2020-06-29 21:51 ` John Ogness
2020-06-29 21:51 ` John Ogness
2020-07-02 8:25 ` lijiang
2020-07-02 8:25 ` lijiang
2020-07-02 9:02 ` John Ogness
2020-07-02 9:02 ` John Ogness
2020-07-02 9:43 ` lijiang
2020-07-02 9:43 ` lijiang
2020-07-02 13:31 ` Petr Mladek
2020-07-02 13:31 ` Petr Mladek
2020-07-04 1:12 ` lijiang
2020-07-04 1:12 ` lijiang
2020-07-03 11:54 ` John Ogness
2020-07-03 11:54 ` John Ogness
2020-07-08 5:50 ` lijiang
2020-07-08 5:50 ` lijiang
2020-06-25 7:19 ` [PATCH v3 0/3] printk: replace ringbuffer Dave Young
2020-06-25 7:19 ` Dave Young
2020-06-25 14:13 ` John Ogness
2020-06-25 14:13 ` John Ogness
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