Re: [PATCH RFC net-next 01/14] net: filter: split filter.c into two files

On Tue, Jul 1, 2014 at 9:23 PM, Namhyung Kim [off-list ref] wrote:

Hi Alexei,

On Fri, 27 Jun 2014 17:05:53 -0700, Alexei Starovoitov wrote:

quoted

BPF is used in several kernel components. This split creates logical boundary
between generic eBPF core and the rest

kernel/bpf/core.c: eBPF interpreter

net/core/filter.c: classic->eBPF converter, classic verifiers, socket filters

This patch only moves functions.

Signed-off-by: Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
---
 kernel/Makefile     |    1 +
 kernel/bpf/Makefile |    1 +
 kernel/bpf/core.c   |  545 +++++++++++++++++++++++++++++++++++++++++++++++++++
 net/core/filter.c   |  520 ------------------------------------------------
 4 files changed, 547 insertions(+), 520 deletions(-)
 create mode 100644 kernel/bpf/Makefile
 create mode 100644 kernel/bpf/core.c

diff --git a/kernel/Makefile b/kernel/Makefile
index f2a8b6246ce9..e7360b7c2c0e 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile

@@ -87,6 +87,7 @@ obj-$(CONFIG_RING_BUFFER) += trace/
 obj-$(CONFIG_TRACEPOINTS) += trace/
 obj-$(CONFIG_IRQ_WORK) += irq_work.o
 obj-$(CONFIG_CPU_PM) += cpu_pm.o
+obj-$(CONFIG_NET) += bpf/

But this still requires CONFIG_NET to use bpf.  Why not adding
CONFIG_BPF and making CONFIG_NET selects it?

This is the first patch that does 'split only'. Later patch replaces this line
with CONFIG_BPF.