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PNP: add CONFIG_PNP_DEBUG_MESSAGES and pnp_dbg()

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This adds the core function pnp_dbg() and a new config option to
enable it.

The PNP core debugging messages can be enabled at boot-time with the
"pnp.debug" kernel parameter.

Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Bjorn Helgaas 2008-08-19 16:53:41 -06:00 • committed by Len Brown
commit 97ef062bbe
4 changed files with 39 additions and 0 deletions
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14
drivers/pnp/Kconfig
View file

@ -20,6 +20,20 @@ menuconfig PNP
If unsure, say Y.
config PNP_DEBUG_MESSAGES
default y
bool "PNP debugging messages"
depends on PNP
help
Say Y here if you want the PNP layer to be able to produce debugging
messages if needed. The messages can be enabled at boot-time with
the pnp.debug kernel parameter.
This option allows you to save a bit of space if you do not want
the messages to even be built into the kernel.
If you have any doubts about this, say Y here.
if PNP
config PNP_DEBUG

10
drivers/pnp/base.h
View file

@ -166,3 +166,13 @@ struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
resource_size_t start,
resource_size_t end, int flags);
extern int pnp_debug;
#if defined(CONFIG_PNP_DEBUG_MESSAGES)
#define pnp_dbg(dev, format, arg...) \
({ if (pnp_debug) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
#else
#define pnp_dbg(dev, format, arg...) \
({ if (0) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
#endif

11
drivers/pnp/core.c
View file

@ -221,3 +221,14 @@ static int __init pnp_init(void)
}
subsys_initcall(pnp_init);
int pnp_debug;
#if defined(CONFIG_PNP_DEBUG_MESSAGES)
static int __init pnp_debug_setup(char *__unused)
{
pnp_debug = 1;
return 1;
}
__setup("pnp.debug", pnp_debug_setup);
#endif