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driver core: remove polling for driver_probe_done(v5) 

This patch removes 100ms polling for driver_probe_done in
wait_for_device_probe(), and uses wait_event() instead.
Removing polling in fs initialization may lead to
a faster boot.

This patch also changes the return type of wait_for_device_done()
from int to void.

This patch is against Arjan's patch in linux-next tree.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ming Lei 2009-02-21 16:45:07 +08:00 committed by Greg Kroah-Hartman
parent 04256b4a8f
commit b23530ebc3
2 changed files with 3 additions and 7 deletions
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8
drivers/base/dd.c
View File

@ -172,16 +172,12 @@ int driver_probe_done(void)
/**
* wait_for_device_probe
* Wait for device probing to be completed.
*
* Note: this function polls at 100 msec intervals.
*/
int wait_for_device_probe(void)
void wait_for_device_probe(void)
{
/* wait for the known devices to complete their probing */
while (driver_probe_done() != 0)
msleep(100);
wait_event(probe_waitqueue, atomic_read(&probe_count) == 0);
async_synchronize_full();
return 0;
}
/**

2
include/linux/device.h
View File

@ -147,7 +147,7 @@ extern void put_driver(struct device_driver *drv);
extern struct device_driver *driver_find(const char *name,
struct bus_type *bus);
extern int driver_probe_done(void);
extern int wait_for_device_probe(void);
extern void wait_for_device_probe(void);
/* sysfs interface for exporting driver attributes */