sysfs: export sysfs_remove_file_self()

Function is going to be used in transport over RDMA module in subsequent
patches, so export it to GPL modules.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Roman Pen <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Cc: [email protected]
[jwang: extend the commit message]
Signed-off-by: Jack Wang <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

fs/sysfs/file.c

@@ -492,6 +492,7 @@ bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr)
 	kernfs_put(kn);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(sysfs_remove_file_self);
 
 void sysfs_remove_files(struct kobject *kobj, const struct attribute * const *ptr)
 {