* [PATCH][bpf-next] bpf: remove redundant variable old_flags
@ 2017-10-11 10:56 Colin King
2017-10-11 18:15 ` Alexei Starovoitov
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Colin King @ 2017-10-11 10:56 UTC (permalink / raw)
To: Alexei Starovoitov, Daniel Borkmann, netdev; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Variable old_flags is being assigned but is never read; it is redundant
and can be removed.
Cleans up clang warning: Value stored to 'old_flags' is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
kernel/bpf/cgroup.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index e88abc0865d5..3db5a17fcfe8 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -192,7 +192,6 @@ int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
struct cgroup_subsys_state *css;
struct bpf_prog_list *pl;
bool pl_was_allocated;
- u32 old_flags;
int err;
if ((flags & BPF_F_ALLOW_OVERRIDE) && (flags & BPF_F_ALLOW_MULTI))
@@ -239,7 +238,6 @@ int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
pl->prog = prog;
}
- old_flags = cgrp->bpf.flags[type];
cgrp->bpf.flags[type] = flags;
/* allocate and recompute effective prog arrays */
--
2.14.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH][bpf-next] bpf: remove redundant variable old_flags
2017-10-11 10:56 [PATCH][bpf-next] bpf: remove redundant variable old_flags Colin King
@ 2017-10-11 18:15 ` Alexei Starovoitov
2017-10-11 22:19 ` Daniel Borkmann
2017-10-12 3:23 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Alexei Starovoitov @ 2017-10-11 18:15 UTC (permalink / raw)
To: Colin King
Cc: Alexei Starovoitov, Daniel Borkmann, netdev, kernel-janitors,
linux-kernel
On Wed, Oct 11, 2017 at 11:56:23AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Variable old_flags is being assigned but is never read; it is redundant
> and can be removed.
>
> Cleans up clang warning: Value stored to 'old_flags' is never read
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> kernel/bpf/cgroup.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
> index e88abc0865d5..3db5a17fcfe8 100644
> --- a/kernel/bpf/cgroup.c
> +++ b/kernel/bpf/cgroup.c
> @@ -192,7 +192,6 @@ int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
> struct cgroup_subsys_state *css;
> struct bpf_prog_list *pl;
> bool pl_was_allocated;
> - u32 old_flags;
> int err;
>
> if ((flags & BPF_F_ALLOW_OVERRIDE) && (flags & BPF_F_ALLOW_MULTI))
> @@ -239,7 +238,6 @@ int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
> pl->prog = prog;
> }
>
> - old_flags = cgrp->bpf.flags[type];
Acked-by: Alexei Starovoitov <ast@kernel.org>
thanks for the cleanup. That was a leftover of one of the previous
experiments I did.
The patch is for net-next.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH][bpf-next] bpf: remove redundant variable old_flags
2017-10-11 10:56 [PATCH][bpf-next] bpf: remove redundant variable old_flags Colin King
2017-10-11 18:15 ` Alexei Starovoitov
@ 2017-10-11 22:19 ` Daniel Borkmann
2017-10-12 3:23 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Daniel Borkmann @ 2017-10-11 22:19 UTC (permalink / raw)
To: Colin King, Alexei Starovoitov, netdev; +Cc: kernel-janitors, linux-kernel
On 10/11/2017 12:56 PM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Variable old_flags is being assigned but is never read; it is redundant
> and can be removed.
>
> Cleans up clang warning: Value stored to 'old_flags' is never read
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH][bpf-next] bpf: remove redundant variable old_flags
2017-10-11 10:56 [PATCH][bpf-next] bpf: remove redundant variable old_flags Colin King
2017-10-11 18:15 ` Alexei Starovoitov
2017-10-11 22:19 ` Daniel Borkmann
@ 2017-10-12 3:23 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: David Miller @ 2017-10-12 3:23 UTC (permalink / raw)
To: colin.king; +Cc: ast, daniel, netdev, kernel-janitors, linux-kernel
From: Colin King <colin.king@canonical.com>
Date: Wed, 11 Oct 2017 11:56:23 +0100
> From: Colin Ian King <colin.king@canonical.com>
>
> Variable old_flags is being assigned but is never read; it is redundant
> and can be removed.
>
> Cleans up clang warning: Value stored to 'old_flags' is never read
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Applied.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2017-10-11 10:56 [PATCH][bpf-next] bpf: remove redundant variable old_flags Colin King
2017-10-11 18:15 ` Alexei Starovoitov
2017-10-11 22:19 ` Daniel Borkmann
2017-10-12 3:23 ` David Miller
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