linux-kernel - Re: [RFC PATCH] net: ethernet: ti: am65-cpsw-qos: Add Frame Preemption MAC Merge support

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Message-ID: <5cab2f28-b0e5-b6ab-d981-28436fb3e742@kernel.org>
Date:   Tue, 1 Aug 2023 16:29:55 +0300
From:   Roger Quadros <rogerq@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, s-vadapalli@...com, srk@...com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] net: ethernet: ti: am65-cpsw-qos: Add Frame
 Preemption MAC Merge support



On 01/08/2023 16:28, Vladimir Oltean wrote:
> On Tue, Aug 01, 2023 at 04:19:30PM +0300, Roger Quadros wrote:
>>> Also:
>>>
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:173:6: warning: no previous prototype for function 'am65_cpsw_iet_change_preemptible_tcs' [-Wmissing-prototypes]
>>> void am65_cpsw_iet_change_preemptible_tcs(struct am65_cpsw_port *port, u8 preemptible_tcs)
>>>      ^
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:173:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
>>> void am65_cpsw_iet_change_preemptible_tcs(struct am65_cpsw_port *port, u8 preemptible_tcs)
>>> ^
>>> static
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:179:6: warning: no previous prototype for function 'am65_cpsw_iet_link_state_update' [-Wmissing-prototypes]
>>> void am65_cpsw_iet_link_state_update(struct net_device *ndev)
>>>      ^
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:179:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
>>> void am65_cpsw_iet_link_state_update(struct net_device *ndev)
>>> ^
>>> static
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:699:33: error: redefinition of 'taprio'
>>>         struct tc_taprio_qopt_offload *taprio = type_data;
>>>                                        ^
>>> ../drivers/net/ethernet/ti/am65-cpsw-qos.c:697:33: note: previous definition is here
>>>         struct tc_taprio_qopt_offload *taprio = type_data;
>>>                                        ^
>>> 2 warnings and 1 error generated.
>>> make[7]: *** [../scripts/Makefile.build:243: drivers/net/ethernet/ti/am65-cpsw-qos.o] Error 1
>>> make[7]: *** Waiting for unfinished jobs....
>>
>> I'm pretty sure there weren't any build errors for me.
>> Did you have and resolve conflicts when applying this patch?
> 
> Yup, part of it (the error) is to blame due to an auto-merge (conflict
> with 2d800bc500fb ("net/sched: taprio: replace tc_taprio_qopt_offload ::
> enable with a "cmd" enum")) which failed to do the right thing in
> am65_cpsw_setup_taprio():
> 
> $ git b4 0f18cf9e-9c5b-02dd-b396-729b9fecdfe7@...nel.org
> Looking up https://lore.kernel.org/r/0f18cf9e-9c5b-02dd-b396-729b9fecdfe7%40kernel.org
> Grabbing thread from lore.kernel.org/all/0f18cf9e-9c5b-02dd-b396-729b9fecdfe7%40kernel.org/t.mbox.gz
> Analyzing 5 messages in the thread
> Checking attestation on all messages, may take a moment...
> ---
>   ✓ [PATCH RFC] net: ethernet: ti: am65-cpsw-qos: Add Frame Preemption MAC Merge support
>   ---
>   ✓ Signed: DKIM/kernel.org
> ---
> Total patches: 1
> ---
>  Link: https://lore.kernel.org/r/20230725072338.20789-1-rogerq@kernel.org
>  Base: not specified
> Applying: net: ethernet: ti: am65-cpsw-qos: Add Frame Preemption MAC Merge support
> Using index info to reconstruct a base tree...
> M       drivers/net/ethernet/ti/am65-cpsw-nuss.c
> M       drivers/net/ethernet/ti/am65-cpsw-qos.c
> Falling back to patching base and 3-way merge...
> Auto-merging drivers/net/ethernet/ti/am65-cpsw-qos.c
> Auto-merging drivers/net/ethernet/ti/am65-cpsw-nuss.c
> 
> But part of it is legit, and I saw it with a W=1 C=1 build.
> am65_cpsw_iet_link_state_update() and am65_cpsw_iet_change_preemptible_tcs()
> should be static.

Got it. I'll resolve the warnings. Thanks!

-- 
cheers,
-roger