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authorJan Kara <jack@suse.cz>2017-03-23 01:37:01 +0100
committerJens Axboe <axboe@fb.com>2017-03-22 20:11:35 -0600
commitc70c176ff8c3ff0ac6ef9a831cd591ea9a66bd1a (patch)
treefbeffaadd5bf1aed0daab320f797adabe8b3916a /lib/kobject.c
parentf759741d9d913eb57784a94b9bca78b376fc26a9 (diff)
downloadlwn-c70c176ff8c3ff0ac6ef9a831cd591ea9a66bd1a.tar.gz
lwn-c70c176ff8c3ff0ac6ef9a831cd591ea9a66bd1a.zip
kobject: Export kobject_get_unless_zero()
Make the function available for outside use and fortify it against NULL kobject. CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'lib/kobject.c')
-rw-r--r--lib/kobject.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/kobject.c b/lib/kobject.c
index 445dcaeb0f56..763d70a18941 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -601,12 +601,15 @@ struct kobject *kobject_get(struct kobject *kobj)
}
EXPORT_SYMBOL(kobject_get);
-static struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj)
+struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj)
{
+ if (!kobj)
+ return NULL;
if (!kref_get_unless_zero(&kobj->kref))
kobj = NULL;
return kobj;
}
+EXPORT_SYMBOL(kobject_get_unless_zero);
/*
* kobject_cleanup - free kobject resources.