[PATCH] [RFC] bpf: tracing: new helper bpf_get_current_cgroup_ino
ys114321 at gmail.com
Wed May 23 04:31:04 UTC 2018
On Tue, May 22, 2018 at 8:35 PM, Alexei Starovoitov
<alexei.starovoitov at gmail.com> wrote:
> On Tue, May 22, 2018 at 08:33:24PM -0700, Y Song wrote:
>> + struct cgroup *cgrp = task_dfl_cgroup(current);
>> + if (!cgrp)
>> + return -EINVAL;
> why this check is needed?
No reason :-) Originally I am concerned whether it is possible cgrp
could be NULL.
By looking at the code, it SEEMS to me that it could not be NULL, but I am not
100% sure (as I am not a cgroup expert). Since you are asking,
probably means it cannot be NULL, so will remove it in formal upstream patch.
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