samples/bpf: allow make to be run from samples/bpf/ directory
authorJesper Dangaard Brouer <brouer@redhat.com>
Thu, 28 Apr 2016 12:21:09 +0000 (14:21 +0200)
committerDavid S. Miller <davem@davemloft.net>
Fri, 29 Apr 2016 18:25:33 +0000 (14:25 -0400)
commitb62a796c109ca0be3e49de620a8ea8248412446d
tree94408914e03cc326e3e8764a71c72ce6a1259d43
parent1c97566d515de2ef66873e30288b150f0154f3b3
samples/bpf: allow make to be run from samples/bpf/ directory

It is not intuitive that 'make' must be run from the top level
directory with argument "samples/bpf/" to compile these eBPF samples.

Introduce a kbuild make file trick that allow make to be run from the
"samples/bpf/" directory itself.  It basically change to the top level
directory and call "make samples/bpf/" with the "/" slash after the
directory name.

Also add a clean target that only cleans this directory, by taking
advantage of the kbuild external module setting M=$PWD.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
samples/bpf/Makefile
samples/bpf/README.rst