scsi: cgroup: Add cgroup_get_from_id()
Add a new function, cgroup_get_from_id(), to retrieve the cgroup associated with a cgroup id. Also export the function cgroup_get_e_css() as this is needed in blk-cgroup.h. Link: https://lore.kernel.org/r/20210608043556.274139-2-muneendra.kumar@broadcom.com Reviewed-by:Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by:
Hannes Reinecke <hare@suse.de> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Muneendra Kumar <muneendra.kumar@broadcom.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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