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Groups > linux.kernel > #1289772 > unrolled thread

[PATCH] bpf: constify bpf_verifier_ops structure

Started byJulia Lawall <Julia.Lawall@lip6.fr>
First post2015-12-11 18:50 +0100
Last post2015-12-11 19:20 +0100
Articles 5 — 4 participants

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  [PATCH] bpf: constify bpf_verifier_ops structure Julia Lawall <Julia.Lawall@lip6.fr> - 2015-12-11 18:50 +0100
    Re: [PATCH] bpf: constify bpf_verifier_ops structure Steven Rostedt <rostedt@goodmis.org> - 2015-12-11 19:20 +0100
      Re: [PATCH] bpf: constify bpf_verifier_ops structure Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-11 19:20 +0100
    Re: [PATCH] bpf: constify bpf_verifier_ops structure Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-11 19:20 +0100
    Re: [PATCH] bpf: constify bpf_verifier_ops structure Daniel Borkmann <daniel@iogearbox.net> - 2015-12-11 19:20 +0100

#1289772 — [PATCH] bpf: constify bpf_verifier_ops structure

FromJulia Lawall <Julia.Lawall@lip6.fr>
Date2015-12-11 18:50 +0100
Subject[PATCH] bpf: constify bpf_verifier_ops structure
Message-ID<qEzZn-7Cr-5@gated-at.bofh.it>
This bpf_verifier_ops structure is never modified, like the other
bpf_verifier_ops structures, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 kernel/trace/bpf_trace.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 4228fd3..45dd798 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -316,7 +316,7 @@ static bool kprobe_prog_is_valid_access(int off, int size, enum bpf_access_type
 	return true;
 }
 
-static struct bpf_verifier_ops kprobe_prog_ops = {
+static const struct bpf_verifier_ops kprobe_prog_ops = {
 	.get_func_proto  = kprobe_prog_func_proto,
 	.is_valid_access = kprobe_prog_is_valid_access,
 };

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#1289801

FromSteven Rostedt <rostedt@goodmis.org>
Date2015-12-11 19:20 +0100
Message-ID<qEAsq-81R-17@gated-at.bofh.it>
In reply to#1289772
On Fri, 11 Dec 2015 18:35:59 +0100
Julia Lawall <Julia.Lawall@lip6.fr> wrote:

> This bpf_verifier_ops structure is never modified, like the other
> bpf_verifier_ops structures, so declare it as const.
> 
> Done with the help of Coccinelle.

Thanks, I'll add this to my 4.5 queue.

-- Steve

> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> ---
>  kernel/trace/bpf_trace.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
> index 4228fd3..45dd798 100644
> --- a/kernel/trace/bpf_trace.c
> +++ b/kernel/trace/bpf_trace.c
> @@ -316,7 +316,7 @@ static bool kprobe_prog_is_valid_access(int off, int size, enum bpf_access_type
>  	return true;
>  }
>  
> -static struct bpf_verifier_ops kprobe_prog_ops = {
> +static const struct bpf_verifier_ops kprobe_prog_ops = {
>  	.get_func_proto  = kprobe_prog_func_proto,
>  	.is_valid_access = kprobe_prog_is_valid_access,
>  };

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#1289806

FromAlexei Starovoitov <alexei.starovoitov@gmail.com>
Date2015-12-11 19:20 +0100
Message-ID<qEAsq-81R-31@gated-at.bofh.it>
In reply to#1289801
On Fri, Dec 11, 2015 at 01:12:56PM -0500, Steven Rostedt wrote:
> On Fri, 11 Dec 2015 18:35:59 +0100
> Julia Lawall <Julia.Lawall@lip6.fr> wrote:
> 
> > This bpf_verifier_ops structure is never modified, like the other
> > bpf_verifier_ops structures, so declare it as const.
> > 
> > Done with the help of Coccinelle.
> 
> Thanks, I'll add this to my 4.5 queue.

emails crossed. this is also fine with me.

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#1289802

FromAlexei Starovoitov <alexei.starovoitov@gmail.com>
Date2015-12-11 19:20 +0100
Message-ID<qEAsq-81R-15@gated-at.bofh.it>
In reply to#1289772
On Fri, Dec 11, 2015 at 06:35:59PM +0100, Julia Lawall wrote:
> This bpf_verifier_ops structure is never modified, like the other
> bpf_verifier_ops structures, so declare it as const.
> 
> Done with the help of Coccinelle.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Acked-by: Alexei Starovoitov <ast@kernel.org>

Ingo, can you take it into tip ? Thanks!

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#1289808

FromDaniel Borkmann <daniel@iogearbox.net>
Date2015-12-11 19:20 +0100
Message-ID<qEAsq-81R-37@gated-at.bofh.it>
In reply to#1289772
On 12/11/2015 06:35 PM, Julia Lawall wrote:
> This bpf_verifier_ops structure is never modified, like the other
> bpf_verifier_ops structures, so declare it as const.
>
> Done with the help of Coccinelle.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Thanks Julia!

Acked-by: Daniel Borkmann <daniel@iogearbox.net>
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