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driver core: return bool from driver_probe_done

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bool is the most sensible return value for a yes/no return.  Also
add __init as this funtion is only called from the early boot code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20230531125535.676098-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2023-05-31 14:55:12 +02:00
committed by Jens Axboe
parent dd2e31afba
commit aa5f6ed8c2
3 changed files with 4 additions and 6 deletions
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6
drivers/base/dd.c
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@@ -751,14 +751,12 @@ static int really_probe_debug(struct device *dev, struct device_driver *drv)
* *
* Should somehow figure out how to use a semaphore, not an atomic variable... * Should somehow figure out how to use a semaphore, not an atomic variable...
*/ */
int driver_probe_done(void) bool __init driver_probe_done(void)
{ {
int local_probe_count = atomic_read(&probe_count); int local_probe_count = atomic_read(&probe_count);
pr_debug("%s: probe_count = %d\n", __func__, local_probe_count); pr_debug("%s: probe_count = %d\n", __func__, local_probe_count);
if (local_probe_count) return !local_probe_count;
return -EBUSY;
return 0;
} }
/** /**

2
include/linux/device/driver.h
View File

@@ -126,7 +126,7 @@ int __must_check driver_register(struct device_driver *drv);
void driver_unregister(struct device_driver *drv); void driver_unregister(struct device_driver *drv);
struct device_driver *driver_find(const char *name, const struct bus_type *bus); struct device_driver *driver_find(const char *name, const struct bus_type *bus);
int driver_probe_done(void); bool __init driver_probe_done(void);
void wait_for_device_probe(void); void wait_for_device_probe(void);
void __init wait_for_init_devices_probe(void); void __init wait_for_init_devices_probe(void);

2
init/do_mounts.c
View File

@@ -635,7 +635,7 @@ void __init prepare_namespace(void)
if ((ROOT_DEV == 0) && root_wait) { if ((ROOT_DEV == 0) && root_wait) {
printk(KERN_INFO "Waiting for root device %s...\n", printk(KERN_INFO "Waiting for root device %s...\n",
saved_root_name); saved_root_name);
while (driver_probe_done() != 0 || while (!driver_probe_done() ||
(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
msleep(5); msleep(5);
async_synchronize_full(); async_synchronize_full();