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Date: Sat, 25 Aug 2012 08:12:23 +0100 (BST)
From: Hin-Tak Leung <htl10@...rs.sourceforge.net>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"1345726463.82057.YahooMailClassic@...29403.mail.ird.yahoo.com"
<1345726463.82057.YahooMailClassic@...29403.mail.ird.yahoo.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
"joe@...ches.com" <joe@...ches.com>,
"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
"crope@....fi" <crope@....fi>
Subject: Re: [v3 1/1] driver-core: Shut up dev_dbg_reatelimited() without DEBUG
--- On Fri, 24/8/12, Hiroshi Doyu <hdoyu@...dia.com> wrote:
> From: Hiroshi Doyu <hdoyu@...dia.com>
> Subject: [v3 1/1] driver-core: Shut up dev_dbg_reatelimited() without DEBUG
> To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "htl10@...rs.sourceforge.net" <htl10@...rs.sourceforge.net>, "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>, "joe@...ches.com" <joe@...ches.com>, "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>, "crope@....fi" <crope@....fi>
> Date: Friday, 24 August, 2012, 5:35
> dev_dbg_reatelimited() without DEBUG
> printed "217078 callbacks
> suppressed". This shouldn't print anything without DEBUG.
>
> With CONFIG_DYNAMIC_DEBUG, the print should be configured as
> expected.
>
> Signed-off-by: Hiroshi Doyu <hdoyu@...dia.com>
> Reported-by: Hin-Tak Leung <htl10@...rs.sourceforge.net>
> Tested-by: Antti Palosaari <crope@....fi>
> Acked-by: Hin-Tak Leung <htl10@...rs.sourceforge.net>
Tested-by: Hin-Tak Leung <htl10@...rs.sourceforge.net>
Went ahead and patched my 2.5.x distro kernel-devel package header, and it works as expected. Apologies about the red-herring with media_build (for those who are not familar with it, = "back-port" wrapper package for building new DVB modules against older kernels).
The distro kernel-devel headers is per installed distro kernel so will be replaced in a week or two... no permanent demage done :-).
> ---
> include/linux/device.h | 62
> +++++++++++++++++++++++++++++------------------
> 1 files changed, 38 insertions(+), 24 deletions(-)
>
> diff --git a/include/linux/device.h
> b/include/linux/device.h
> index 9648331..bb6ffcb 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -932,6 +932,32 @@ int _dev_info(const struct device *dev,
> const char *fmt, ...)
>
> #endif
>
> +/*
> + * Stupid hackaround for existing uses of non-printk uses
> dev_info
> + *
> + * Note that the definition of dev_info below is actually
> _dev_info
> + * and a macro is used to avoid redefining dev_info
> + */
> +
> +#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt,
> ##arg)
> +
> +#if defined(CONFIG_DYNAMIC_DEBUG)
> +#define dev_dbg(dev, format, ...)
> \
> +do {
>
> \
> + dynamic_dev_dbg(dev, format,
> ##__VA_ARGS__); \
> +} while (0)
> +#elif defined(DEBUG)
> +#define dev_dbg(dev, format, arg...)
> \
> + dev_printk(KERN_DEBUG, dev, format,
> ##arg)
> +#else
> +#define dev_dbg(dev, format, arg...)
> \
> +({
>
> \
> + if (0)
>
> \
> +
> dev_printk(KERN_DEBUG, dev, format,
> ##arg); \
> + 0;
>
> \
> +})
> +#endif
> +
> #define dev_level_ratelimited(dev_level, dev, fmt,
> ...)
> \
> do {
>
>
> \
> static
> DEFINE_RATELIMIT_STATE(_rs,
> \
> @@ -955,33 +981,21 @@ 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)
> #define dev_dbg_ratelimited(dev, fmt,
> ...)
> \
> - dev_level_ratelimited(dev_dbg, dev, fmt,
> ##__VA_ARGS__)
> -
> -/*
> - * Stupid hackaround for existing uses of non-printk uses
> dev_info
> - *
> - * Note that the definition of dev_info below is actually
> _dev_info
> - * and a macro is used to avoid redefining dev_info
> - */
> -
> -#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt,
> ##arg)
> -
> -#if defined(CONFIG_DYNAMIC_DEBUG)
> -#define dev_dbg(dev, format, ...)
> \
> -do {
>
> \
> - dynamic_dev_dbg(dev, format,
> ##__VA_ARGS__); \
> +do {
>
>
> \
> + static
> DEFINE_RATELIMIT_STATE(_rs,
> \
> +
>
> DEFAULT_RATELIMIT_INTERVAL, \
> +
>
> DEFAULT_RATELIMIT_BURST);
> \
> +
> DEFINE_DYNAMIC_DEBUG_METADATA(descriptor,
> fmt);
> \
> + if (unlikely(descriptor.flags &
> _DPRINTK_FLAGS_PRINT) && \
> +
> __ratelimit(&_rs))
>
> \
> +
> __dynamic_pr_debug(&descriptor,
> pr_fmt(fmt), \
> +
>
> ##__VA_ARGS__);
> \
> } while (0)
> -#elif defined(DEBUG)
> -#define dev_dbg(dev, format, arg...)
> \
> - dev_printk(KERN_DEBUG, dev, format,
> ##arg)
> #else
> -#define dev_dbg(dev, format, arg...)
> \
> -({
>
> \
> - if (0)
>
> \
> -
> dev_printk(KERN_DEBUG, dev, format,
> ##arg); \
> - 0;
>
> \
> -})
> +#define dev_dbg_ratelimited(dev, fmt,
> ...)
> \
> + no_printk(KERN_DEBUG pr_fmt(fmt),
> ##__VA_ARGS__)
> #endif
>
> #ifdef VERBOSE_DEBUG
> --
> 1.7.5.4
>
--
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