netdev - Re: [PATCH iwl-net v2] ice: health.c: fix compilation on gcc 7.5

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Message-ID: <20250207135009.GW554665@kernel.org>
Date: Fri, 7 Feb 2025 13:50:09 +0000
From: Simon Horman <horms@...nel.org>
To: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Cc: intel-wired-lan@...ts.osuosl.org,
	Tony Nguyen <anthony.l.nguyen@...el.com>, netdev@...r.kernel.org,
	Konrad Knitter <konrad.knitter@...el.com>,
	Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
	Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
	Kees Cook <kees@...nel.org>, Jiri Slaby <jirislaby@...nel.org>
Subject: Re: [PATCH iwl-net v2] ice: health.c: fix compilation on gcc 7.5

On Thu, Feb 06, 2025 at 11:30:23PM +0100, Przemek Kitszel wrote:
> GCC 7 is not as good as GCC 8+ in telling what is a compile-time
> const, and thus could be used for static storage.
> Fortunately keeping strings as const arrays is enough to make old
> gcc happy.
> 
> Excerpt from the report:
> My GCC is: gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0.
> 
>   CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.o
> drivers/net/ethernet/intel/ice/devlink/health.c:35:3: error: initializer element is not constant
>    ice_common_port_solutions, {ice_port_number_label}},
>    ^~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/ethernet/intel/ice/devlink/health.c:35:3: note: (near initialization for 'ice_health_status_lookup[0].solution')
> drivers/net/ethernet/intel/ice/devlink/health.c:35:31: error: initializer element is not constant
>    ice_common_port_solutions, {ice_port_number_label}},
>                                ^~~~~~~~~~~~~~~~~~~~~
> drivers/net/ethernet/intel/ice/devlink/health.c:35:31: note: (near initialization for 'ice_health_status_lookup[0].data_label[0]')
> drivers/net/ethernet/intel/ice/devlink/health.c:37:46: error: initializer element is not constant
>    "Change or replace the module or cable.", {ice_port_number_label}},
>                                               ^~~~~~~~~~~~~~~~~~~~~
> drivers/net/ethernet/intel/ice/devlink/health.c:37:46: note: (near initialization for 'ice_health_status_lookup[1].data_label[0]')
> drivers/net/ethernet/intel/ice/devlink/health.c:39:3: error: initializer element is not constant
>    ice_common_port_solutions, {ice_port_number_label}},
>    ^~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Fixes: 85d6164ec56d ("ice: add fw and port health reporters")
> Reported-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>
> Closes: https://lore.kernel.org/netdev/CY8PR11MB7134BF7A46D71E50D25FA7A989F72@CY8PR11MB7134.namprd11.prod.outlook.com
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
> Suggested-by: Simon Horman <horms@...nel.org>
> Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> ---
> v2: use static const char[] instead of #define - Simon
>     +added RB tag from Michal, but not adding TB tag from Qiuxu
> 
> v1:
>  https://lore.kernel.org/netdev/20250205104252.30464-2-przemyslaw.kitszel@intel.com
> 
> CC: Kees Cook <kees@...nel.org>
> CC: Jiri Slaby <jirislaby@...nel.org>

Thanks Przemek,

Testing locally gcc 7.5.0 [1] seems happy with this.

Reviewed-by: Simon Horman <horms@...nel.org>

[1] https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/7.5.0/