* [PATCH] mptcp: Remove redundant assignment to remaining
@ 2021-06-15 10:55 Jiapeng Chong
2021-06-15 23:52 ` Mat Martineau
0 siblings, 1 reply; 3+ messages in thread
From: Jiapeng Chong @ 2021-06-15 10:55 UTC (permalink / raw)
To: mathew.j.martineau
Cc: matthieu.baerts, davem, kuba, netdev, mptcp, linux-kernel, Jiapeng Chong
Variable remaining is assigned, but this value is never read as it is
not used later on, hence it is a redundant assignment and can be
removed.
Clean up the following clang-analyzer warning:
net/mptcp/options.c:779:3: warning: Value stored to 'remaining' is never
read [clang-analyzer-deadcode.DeadStores].
net/mptcp/options.c:547:3: warning: Value stored to 'remaining' is never
read [clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
net/mptcp/options.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 9b263f2..f99272f 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -544,7 +544,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
map_size = TCPOLEN_MPTCP_DSS_BASE + TCPOLEN_MPTCP_DSS_MAP64;
- remaining -= map_size;
dss_size = map_size;
if (mpext)
opts->ext_copy = *mpext;
@@ -776,7 +775,6 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
if (mptcp_established_options_mp_prio(sk, &opt_size, remaining, opts)) {
*size += opt_size;
- remaining -= opt_size;
ret = true;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] mptcp: Remove redundant assignment to remaining
2021-06-15 10:55 [PATCH] mptcp: Remove redundant assignment to remaining Jiapeng Chong
@ 2021-06-15 23:52 ` Mat Martineau
0 siblings, 0 replies; 3+ messages in thread
From: Mat Martineau @ 2021-06-15 23:52 UTC (permalink / raw)
To: Jiapeng Chong; +Cc: matthieu.baerts, davem, kuba, netdev, mptcp, linux-kernel
On Tue, 15 Jun 2021, Jiapeng Chong wrote:
> Variable remaining is assigned, but this value is never read as it is
> not used later on, hence it is a redundant assignment and can be
> removed.
>
> Clean up the following clang-analyzer warning:
>
> net/mptcp/options.c:779:3: warning: Value stored to 'remaining' is never
> read [clang-analyzer-deadcode.DeadStores].
>
> net/mptcp/options.c:547:3: warning: Value stored to 'remaining' is never
> read [clang-analyzer-deadcode.DeadStores].
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> ---
> net/mptcp/options.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/net/mptcp/options.c b/net/mptcp/options.c
> index 9b263f2..f99272f 100644
> --- a/net/mptcp/options.c
> +++ b/net/mptcp/options.c
> @@ -544,7 +544,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
>
> map_size = TCPOLEN_MPTCP_DSS_BASE + TCPOLEN_MPTCP_DSS_MAP64;
>
> - remaining -= map_size;
Hi Jiapeng, thank you for your MPTCP patch!
This change in mptcp_established_options_dss() removes the only reference
to 'remaining' in that function, so the variable should also be removed
from the function parameters. It also appears to be unused in
mptcp_established_options_mp().
I'd like to handle this patch through the MPTCP tree so we can manage
conflicts with other in-progress patches. This patch does apply to
net-next cleanly but not our subsystem branch. You can find our git repo
at https://github.com/multipath-tcp/mptcp_net-next, and develop patches
using the 'export' branch. If you email a v2 patch to
mptcp@lists.linux.dev (no need to cc other lists), Matthieu and I can make
sure it is integrated in the MPTCP repository and handle sending it to
netdev along with other patches from the MPTCP community.
> dss_size = map_size;
> if (mpext)
> opts->ext_copy = *mpext;
> @@ -776,7 +775,6 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
>
> if (mptcp_established_options_mp_prio(sk, &opt_size, remaining, opts)) {
> *size += opt_size;
> - remaining -= opt_size;
> ret = true;
> }
>
> --
> 1.8.3.1
Best regards,
--
Mat Martineau
Intel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] mptcp: Remove redundant assignment to remaining
@ 2021-06-15 23:52 ` Mat Martineau
0 siblings, 0 replies; 3+ messages in thread
From: Mat Martineau @ 2021-06-15 23:52 UTC (permalink / raw)
To: Jiapeng Chong; +Cc: matthieu.baerts, davem, kuba, netdev, mptcp, linux-kernel
On Tue, 15 Jun 2021, Jiapeng Chong wrote:
> Variable remaining is assigned, but this value is never read as it is
> not used later on, hence it is a redundant assignment and can be
> removed.
>
> Clean up the following clang-analyzer warning:
>
> net/mptcp/options.c:779:3: warning: Value stored to 'remaining' is never
> read [clang-analyzer-deadcode.DeadStores].
>
> net/mptcp/options.c:547:3: warning: Value stored to 'remaining' is never
> read [clang-analyzer-deadcode.DeadStores].
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> ---
> net/mptcp/options.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/net/mptcp/options.c b/net/mptcp/options.c
> index 9b263f2..f99272f 100644
> --- a/net/mptcp/options.c
> +++ b/net/mptcp/options.c
> @@ -544,7 +544,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
>
> map_size = TCPOLEN_MPTCP_DSS_BASE + TCPOLEN_MPTCP_DSS_MAP64;
>
> - remaining -= map_size;
Hi Jiapeng, thank you for your MPTCP patch!
This change in mptcp_established_options_dss() removes the only reference
to 'remaining' in that function, so the variable should also be removed
from the function parameters. It also appears to be unused in
mptcp_established_options_mp().
I'd like to handle this patch through the MPTCP tree so we can manage
conflicts with other in-progress patches. This patch does apply to
net-next cleanly but not our subsystem branch. You can find our git repo
at https://github.com/multipath-tcp/mptcp_net-next, and develop patches
using the 'export' branch. If you email a v2 patch to
mptcp@lists.linux.dev (no need to cc other lists), Matthieu and I can make
sure it is integrated in the MPTCP repository and handle sending it to
netdev along with other patches from the MPTCP community.
> dss_size = map_size;
> if (mpext)
> opts->ext_copy = *mpext;
> @@ -776,7 +775,6 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
>
> if (mptcp_established_options_mp_prio(sk, &opt_size, remaining, opts)) {
> *size += opt_size;
> - remaining -= opt_size;
> ret = true;
> }
>
> --
> 1.8.3.1
Best regards,
--
Mat Martineau
Intel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-06-15 10:55 [PATCH] mptcp: Remove redundant assignment to remaining Jiapeng Chong
2021-06-15 23:52 ` Mat Martineau
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