Previously, bpf_restrict_fsaccess_prepare() is called twice in bpf_restrict_fsaccess_setup(). One by through bpf_restrict_fsaccess_supported() and one by itself directly. In PID1, bpf_restrict_fsaccess_prepare() was only called by bpf_restrict_fsaccess_setup(), hence it is not necessary to exist as a separated function. bpf_restrict_fsaccess_prepare() loads BPF program(s), hence it is slightly slow operation. Let's avoid redundant loading of BPF programs by merging bpf_restrict_fsaccess_supported() into bpf_restrict_fsaccess_setup(). Co-authored-by: Eric Curtin <eric.curtin@docker.com>
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