diff options
| author | Ingo Molnar <mingo@kernel.org> | 2021-08-29 09:18:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-04 14:36:06 +0100 |
| commit | f083266487690124481eac0869da850406fb3ed3 (patch) | |
| tree | 303cb74c7b12ad0b4615fd4cfdc234444ead79a7 /drivers/base/core.c | |
| parent | 28f0c335dd4a1a4b44b3e6c6402825a93132e1a4 (diff) | |
| download | linux-f083266487690124481eac0869da850406fb3ed3.tar.bz2 | |
headers/uninline: Uninline single-use function: kobject_has_children()
This was the only usage of <linux/kref_api.h> in <linux/kobject_api.h>,
so we'll able to decouple the two after this change.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 60d703ebd123..603941b00988 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3028,6 +3028,23 @@ static inline struct kobject *get_glue_dir(struct device *dev) return dev->kobj.parent; } +/** + * kobject_has_children - Returns whether a kobject has children. + * @kobj: the object to test + * + * This will return whether a kobject has other kobjects as children. + * + * It does NOT account for the presence of attribute files, only sub + * directories. It also assumes there is no concurrent addition or + * removal of such children, and thus relies on external locking. + */ +static inline bool kobject_has_children(struct kobject *kobj) +{ + WARN_ON_ONCE(kref_read(&kobj->kref) == 0); + + return kobj->sd && kobj->sd->dir.subdirs; +} + /* * make sure cleaning up dir as the last step, we need to make * sure .release handler of kobject is run with holding the |