linux-kernel - Re: [PATCH v3 1/1] dev-core: fix build break when DEBUG is enabled

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Date:	Wed, 28 Aug 2013 10:56:04 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	Joe Perches <joe@...ches.com>, Jason Baron <jbaron@...mai.com>,
	Dmitry Kasatkin <d.kasatkin@...sung.com>,
	Hiroshi Doyu <hdoyu@...dia.com>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 1/1] dev-core: fix build break when DEBUG is enabled

On Wed, Aug 28, 2013 at 10:50:31AM -0700, Sarah Sharp wrote:
> Any objections to queuing this patch through Greg's usb-next tree?  I've
> already sent the 2/2 patch, which will cause build breakage without this
> patch.
> 
> Changes since v2:
>  - Fixed a checkpatch warning caused by a comment in a macro.
> 
> Sarah Sharp
> 
> >8----------------------------------------------------------------8<
> 
> From: Dmitry Kasatkin <d.kasatkin@...sung.com>
> 
> When DEBUG is defined, dev_dbg_ratelimited uses dynamic debug data
> structures even when CONFIG_DYNAMIC_DEBUG is not defined.
> It leads to build break.
> For example, when I try to use dev_dbg_ratelimited in USB code and
> CONFIG_USB_DEBUG is enabled, but CONFIG_DYNAMIC_DEBUG is not, I get:
> 
>   CC [M]  drivers/usb/host/xhci-ring.o
>   drivers/usb/host/xhci-ring.c: In function ‘xhci_queue_intr_tx’:
>   drivers/usb/host/xhci-ring.c:3059:3: error: implicit declaration of function ‘DEFINE_DYNAMIC_DEBUG_METADATA’ [-Werror=implicit-function-declaration]
>   drivers/usb/host/xhci-ring.c:3059:3: error: ‘descriptor’ undeclared (first use in this function)
>   drivers/usb/host/xhci-ring.c:3059:3: note: each undeclared identifier is reported only once for each function it appears in
>   drivers/usb/host/xhci-ring.c:3059:3: error: implicit declaration of function ‘__dynamic_pr_debug’ [-Werror=implicit-function-declaration]
>   drivers/usb/host/xhci-ring.c: In function ‘xhci_queue_isoc_tx_prepare’:
>   drivers/usb/host/xhci-ring.c:3847:3: error: ‘descriptor’ undeclared (first use in this function)
>   cc1: some warnings being treated as errors
>   make[2]: *** [drivers/usb/host/xhci-ring.o] Error 1
>   make[1]: *** [drivers/usb/host] Error 2
>   make: *** [drivers/usb/] Error 2
> 
> This patch separates definition for CONFIG_DYNAMIC_DEBUG and DEBUG cases.
> 
> [Note, Sarah moved the comment above the macro to avoid checkpatch
> warnings.]
> 
> Signed-off-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
> Signed-off-by: Sarah Sharp <sarah.a.sharp@...ux.intel.com>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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