linux-kernel - Re: [PATCH] plist: include -DDEBUG if CONFIG_DEBUG_PI

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Date:	Fri, 2 May 2014 16:41:48 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Dan Streetman <ddstreet@...e.org>
Cc:	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] plist: include -DDEBUG if CONFIG_DEBUG_PI_LIST

On Fri,  2 May 2014 16:23:43 -0400
Dan Streetman <ddstreet@...e.org> wrote:

> lib/plist.c uses pr_debug() in its test function, which is compiled
> and run only when CONFIG_DEBUG_PI_LIST in set; however pr_debug()
> is compiled out unless -DDEBUG is set for the file.
> 
> Update lib/Makefile to add -DDEBUG to CFLAGS_plist.o if
> CONFIG_DEBUG_PI_LIST is set, so that the pr_debug() output from
> plist_test() is shown.

Why not just use printk(KERN_DEBUG ...) then if we always want to print
it?

You could just place

#define DEBUG

in plist.c as well. Although I think just switching to printk() is
better.

-- Steve

> 
> Signed-off-by: Dan Streetman <ddstreet@...e.org>
> ---
>  lib/Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/lib/Makefile b/lib/Makefile
> index 0cd7b68..fd1f4c8 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -39,6 +39,10 @@ CFLAGS_kobject.o += -DDEBUG
>  CFLAGS_kobject_uevent.o += -DDEBUG
>  endif
>  
> +ifeq ($(CONFIG_DEBUG_PI_LIST),y)
> +CFLAGS_plist.o += -DDEBUG
> +endif
> +
>  obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
>  obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
>  obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o

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