Hi,
Rafael J. Wysocki <rjw <at> sisk.pl> writes:
> From: Arjan van de Ven <arjan <at> linux.intel.com>
>
> there's a few places that currently loop over driver_probe_done(), and
> I'm about to add another one. This patch abstracts it into a helper
> to reduce duplication.
[snip]
> +int wait_for_device_probe(void)
> +{
> + /* wait for the known devices to complete their probing */
> + while (driver_probe_done() != 0)
> + msleep(100);
> + async_synchronize_full();
> + return 0;
> +}
[snip]
> Index: linux-2.6/init/do_mounts.c
> ===================================================================
> --- linux-2.6.orig/init/do_mounts.c
> +++ linux-2.6/init/do_mounts.c
[snip]
> @@ -399,6 +403,7 @@ void __init prepare_namespace(void)
> while (driver_probe_done() != 0 ||
> (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
> msleep(100);
> + async_synchronize_full();
> }
Note that even this loop can be consolidated. The while loop above can be
equivalently rewritten as
while ((ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
msleep(100);
while (driver_probe_done() != 0)
msleep(100);
which, with your patch applied is equivalent to
while ((ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
msleep(100);
wait_for_device_probe();
- Hari
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