[PATCH v3.1 0/3] Make core_pattern support namespace

This patchset includes following function points: 1: Let usermodehelper function possible to set pid namespace done by: [PATCH v3.1 1/3] Make call_usermodehelper_exec possible to set pid namespace. 2: Let pipe_type core_pattern write dump into container's rootfs done by: [PATCH v3.1 2/3]

[PATCH v3.1 0/3] Make core_pattern support namespace

This patchset includes following function points: 1: Let usermodehelper function possible to set pid namespace done by: [PATCH v3.1 1/3] Make call_usermodehelper_exec possible to set pid namespace. 2: Let pipe_type core_pattern write dump into container's rootfs done by: [PATCH v3.1 2/3]