linux-kernel - Re: [PATCH] audit: Fix compile time warning on kernel/auditsc.c

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Date:	Mon, 26 Jan 2009 14:38:54 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Rakib Mullick <rakib.mullick@...il.com>
Cc:	"Valdis.Kletnieks@...edu" <Valdis.Kletnieks@...edu>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] audit: Fix compile time warning on kernel/auditsc.c


* Rakib Mullick <rakib.mullick@...il.com> wrote:

> On 1/25/09, Valdis.Kletnieks@...edu <Valdis.Kletnieks@...edu> wrote:
> >
> > Blech.  That's abuse of inline.  Can you find some other, more kernel-y
> >  way to address the issue?  (Possibly make it an actual inline up in a .h
> >  file, with a #ifdef wrapping around it, or do something matching what's
> >  done at the call site (apparently #ifdef'ing code is accepted in that .c
> >  file, adding another #ifdef around that function to match all the *other*
> >  '#ifdef CONFIG_AUDIT_TREE' would be less ugly than 'inline'.
> 
> Hi, Valdis. Thanks for your suggestions. Actually without inline-ing
> the warning doesn't resolves. So, as you said I moved
> audit_set_auditable function into kernel/audit.h, but not #ifdef
> wrapping around it rather #ifdef into it. Since wrapping #ifdef
> generates same warning few times more. Here is the patch. If I miss
> anything, then please notice.
> 
> -----
> Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
> 
> --- linux-2.6-orig/kernel/audit.h	2009-01-23 18:28:45.000000000 +0600
> +++ linux-2.6/kernel/audit.h	2009-01-25 11:50:22.520217272 +0600
> @@ -121,6 +121,16 @@ extern struct mutex audit_filter_mutex;
>  extern void audit_free_rule_rcu(struct rcu_head *);
>  extern struct list_head audit_filter_list[];
> 
> +static inline void audit_set_auditable(struct audit_context *ctx)
> +{
> +#ifdef CONFIG_AUDIT_TREE
> +	if (!ctx->prio) {
> +		ctx->prio = 1;
> +		ctx->current_state = AUDIT_RECORD_CONTEXT;
> +	}
> +#endif
> +}
> +
>  #ifdef CONFIG_AUDIT_TREE
>  extern struct audit_chunk *audit_tree_lookup(const struct inode *);
>  extern void audit_put_chunk(struct audit_chunk *);
> 
> ------
> Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
> 
> --- linux-2.6-orig/kernel/auditsc.c	2009-01-23 18:28:45.000000000 +0600
> +++ linux-2.6/kernel/auditsc.c	2009-01-25 11:50:25.712731936 +0600
> @@ -741,14 +741,6 @@ void audit_filter_inodes(struct task_str
>  	rcu_read_unlock();
>  }
> 
> -static void audit_set_auditable(struct audit_context *ctx)
> -{
> -	if (!ctx->prio) {
> -		ctx->prio = 1;
> -		ctx->current_state = AUDIT_RECORD_CONTEXT;
> -	}
> -}
> -

i dont see how this is an improvement in code quality. A non-oneliner 
function got inlined and an ugly #ifdef got added.

	Ingo
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