[LU-2692] Return ERR_PTR(ENOMEM) for object allocation.

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.4.1
• Severity: 3
• Assignee: WC Triage
• Reporter: Di Wang

Description

Some object allocation API return NULL, instead of ERR_PTR(-ENOMEM), like ofd_object_alloc, mdt_object_alloc...