linux-kernel - [less-CONFIG_NET v2 4/8] seccomp: include nlattr

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Message-ID: <1530189936-25780-5-git-send-email-nmanthey@amazon.de>
Date:   Thu, 28 Jun 2018 14:45:32 +0200
From:   Norbert Manthey <nmanthey@...zon.de>
To:     Norbert Manthey <nmanthey@...zon.de>,
        <linux-kernel@...r.kernel.org>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Kees Cook <keescook@...omium.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        Yury Norov <ynorov@...iumnetworks.com>,
        Nick Terrell <terrelln@...com>,
        Matt Redfearn <matt.redfearn@...s.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [less-CONFIG_NET v2 4/8] seccomp: include nlattr

When we want to use CONFIG_SECCOMP_FILTER without CONFIG_NET, we have
to ensure that the required files that would be pulled in via
CONFIG_NET are compiled when dropping CONFIG_NET.

Here, we could also select CONFIG_NLATTR instead of pulling the file
in explicitly. One could go even one step further and cut the only
required function off, namely nla_find.

This is part of the effort to split CONFIG_SECCOMP_FILTER and
CONFIG_NET.

Signed-off-by: Norbert Manthey <nmanthey@...zon.de>
---
 lib/Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index 90dc552..8cd4909 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -157,7 +157,9 @@ obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o

 obj-$(CONFIG_DYNAMIC_DEBUG) += dynamic_debug.o

-obj-$(CONFIG_NLATTR) += nlattr.o
+ifneq ($(filter y,$(CONFIG_NLATTR) $(CONFIG_SECCOMP_FILTER)),)
+obj-y += nlattr.o
+endif

 obj-$(CONFIG_LRU_CACHE) += lru_cache.o

-- 
2.7.4

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