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| author | Ming Lei <tom.leiming@gmail.com> | 2009-02-21 16:45:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-24 16:38:25 -0700 |
| commit | b23530ebc339c4092ae2c9f37341a5398fea8b89 (patch) | |
| tree | c8f45452c649273271ac292715d4a76baa5e9148 | |
| parent | 04256b4a8fc73f54cd14f20867882c299728a446 (diff) | |
| download | linux-b23530ebc339c4092ae2c9f37341a5398fea8b89.tar.bz2 | |
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>
| -rw-r--r-- | drivers/base/dd.c | 8 | ||||
| -rw-r--r-- | include/linux/device.h | 2 |
2 files changed, 3 insertions, 7 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 3f32df7ed373..0dfd08c15921 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -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; } /** diff --git a/include/linux/device.h b/include/linux/device.h index d5706c448bcb..c56b154a0bf4 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -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 */ |