linux-kernel - Re: [PATCH] RFC: arm: eBPF JIT compiler

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Message-ID: <20170525170051.GC18357@lunn.ch>
Date:   Thu, 25 May 2017 19:00:51 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Shubham Bansal <illusionist.neo@...il.com>
Cc:     Russell King - ARM Linux <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] RFC: arm: eBPF JIT compiler

On Thu, May 25, 2017 at 02:01:36AM +0530, Shubham Bansal wrote:
> Hi Andrew,
> 
> I am attaching the latest patch which should work on ARMv5 , ARMv6 and ARMv7.
> 
> Please test on your machines. Apologies for the last patch. This patch
> should work though.

andrew@...ttle:~/linux$ make -s -j 16
arch/arm/net/bpf_jit_32.c:1755:12: warning: âvalidate_codeâ defined but not used [-Wunused-function]
 static int validate_code(struct jit_ctx *ctx)
            ^~~~~~~~~~~~~
arch/arm/net/bpf_jit_32.c:1724:12: warning: âbuild_bodyâ defined but not used [-Wunused-function]
 static int build_body(struct jit_ctx *ctx)
            ^~~~~~~~~~
arch/arm/net/bpf_jit_32.c:1122:13: warning: âbuild_epilogueâ defined but not used [-Wunused-function]
 static void build_epilogue(struct jit_ctx *ctx)
             ^~~~~~~~~~~~~~
arch/arm/net/bpf_jit_32.c:1049:13: warning: âbuild_prologueâ defined but not used [-Wunused-function]
 static void build_prologue(struct jit_ctx *ctx)
             ^~~~~~~~~~~~~~
arch/arm/net/bpf_jit_32.c:174:13: warning: âjit_fill_holeâ defined but not used [-Wunused-function]
 static void jit_fill_hole(void *area, unsigned int size)
             ^~~~~~~~~~~~~

I _think_ this is because CONFIG_CPU_LITTLE_ENDIAN is not set. But it
is a little endian machine/configuration. ARM does not seem to use
CONFIG_CPU_LITTLE_ENDIAN, it just has CPU_BIG_ENDIAN.

	  Andrew