lkml.org 
[lkml]   [2013]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCHv2 1/2] dev-core: fix build break when DEBUG is enabled
From
Date
On Tue, 2013-08-27 at 17:47 +0300, Dmitry Kasatkin wrote:
> 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:

Jason?

Seems mostly sensible to me but I think the first check
needs to be

#if defined(CONFIG_DYNAMIC_DEBUG) && defined(DEBUG)

Also, it's curious why it was ever using __dynamic_pr_debug
instead of __dynamic_dev_dbg

Maybe for completeness there should be a
dev_vdbg_ratelimited too.

Additional bit below...

> 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.
>
> Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
> ---
> include/linux/device.h | 17 ++++++++++++++---
> 1 file changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/device.h b/include/linux/device.h
> index 22b546a..d336beb 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -1099,17 +1099,28 @@ do { \
> dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
> #define dev_info_ratelimited(dev, fmt, ...) \
> dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
> -#if defined(CONFIG_DYNAMIC_DEBUG) || defined(DEBUG)
> +#if defined(CONFIG_DYNAMIC_DEBUG)

I think this needs to be

#if defined(CONFIG_DYNAMIC_DEBUG) && defined(DEBUG)

> #define dev_dbg_ratelimited(dev, fmt, ...) \
> do { \
> static DEFINE_RATELIMIT_STATE(_rs, \
> DEFAULT_RATELIMIT_INTERVAL, \
> DEFAULT_RATELIMIT_BURST); \
> DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
> + /* descriptor check is first to prevent flooding with \
> + "callbacks suppressed" */ \
> if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
> __ratelimit(&_rs)) \
> - __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
> - ##__VA_ARGS__); \
> + __dynamic_dev_dbg(&descriptor, dev, fmt, \
> + ##__VA_ARGS__); \
> +} while (0)
> +#elif defined(DEBUG)
> +#define dev_dbg_ratelimited(dev, fmt, ...) \
> +do { \
> + static DEFINE_RATELIMIT_STATE(_rs, \
> + DEFAULT_RATELIMIT_INTERVAL, \
> + DEFAULT_RATELIMIT_BURST); \
> + if (__ratelimit(&_rs)) \
> + dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
> } while (0)
> #else
> #define dev_dbg_ratelimited(dev, fmt, ...) \



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2013-08-27 19:01    [W:0.120 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site