linux-kernel - Re: [PATCH -next] kmsg_dump: fix build for CONFIG

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Message-ID: <20091202093508.1f174b6b@marrow.netinsight.se>
Date:	Wed, 2 Dec 2009 09:35:08 +0100
From:	Simon Kagstrom <simon.kagstrom@...insight.net>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwm2@...radead.org>,
	Artem Bityutskiy <dedekind1@...il.com>
Subject: Re: [PATCH -next] kmsg_dump: fix build for CONFIG_PRINTK=n

On Tue, 01 Dec 2009 10:52:02 -0800
Randy Dunlap <randy.dunlap@...cle.com> wrote:

> From: Randy Dunlap <randy.dunlap@...cle.com>
> 
> kmsg_dump() fails to build when CONFIG_PRINTK=n; provide stubs
> for the kmsg_dump*() functions when CONFIG_PRINTK=n.
> 
> kernel/printk.c: In function 'kmsg_dump':
> kernel/printk.c:1501: error: 'log_buf_len' undeclared (first use in this function)
> kernel/printk.c:1502: error: 'logged_chars' undeclared (first use in this function)
> kernel/printk.c:1506: error: 'log_buf' undeclared (first use in this function)
> 
> Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>

Acked-by: Simon Kagstrom <simon.kagstrom@...insight.net>

David/Artem: Will you take Randys patch
(http://lkml.org/lkml/2009/12/1/313) into your tree as well?

// Simon

> Cc: Simon Kagstrom <simon.kagstrom@...insight.net>
> ---
>  include/linux/kmsg_dump.h |   16 ++++++++++++++++
>  kernel/printk.c           |    2 +-
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> --- linux-next-20091201.orig/kernel/printk.c
> +++ linux-next-20091201/kernel/printk.c
> @@ -1406,7 +1406,6 @@ bool printk_timed_ratelimit(unsigned lon
>  	return false;
>  }
>  EXPORT_SYMBOL(printk_timed_ratelimit);
> -#endif
>  
>  static DEFINE_SPINLOCK(dump_list_lock);
>  static LIST_HEAD(dump_list);
> @@ -1525,3 +1524,4 @@ void kmsg_dump(enum kmsg_dump_reason rea
>  		dumper->dump(dumper, reason, s1, l1, s2, l2);
>  	spin_unlock_irqrestore(&dump_list_lock, flags);
>  }
> +#endif
> --- linux-next-20091201.orig/include/linux/kmsg_dump.h
> +++ linux-next-20091201/include/linux/kmsg_dump.h
> @@ -35,10 +35,26 @@ struct kmsg_dumper {
>  	int registered;
>  };
>  
> +#ifdef CONFIG_PRINTK
>  void kmsg_dump(enum kmsg_dump_reason reason);
>  
>  int kmsg_dump_register(struct kmsg_dumper *dumper);
>  
>  int kmsg_dump_unregister(struct kmsg_dumper *dumper);
> +#else
> +static inline void kmsg_dump(enum kmsg_dump_reason reason)
> +{
> +}
> +
> +static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)
> +{
> +	return -EINVAL;
> +}
> +#endif
>  
>  #endif /* _LINUX_KMSG_DUMP_H */

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