linux-kernel - Re: [EXT] [PATCH v2 -next] scsi: qla2xxx: Fix build error implicit-function-declaration

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Message-ID: <dfc510ef-a181-3832-f16c-74f1d7fb5608@marvell.com>
Date:   Mon, 19 Sep 2022 10:54:24 -0700
From:   Arun Easi <aeasi@...vell.com>
To:     Ren Zhijie <renzhijie2@...wei.com>
CC:     <njavali@...vell.com>, <GR-QLogic-Storage-Upstream@...vell.com>,
        <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <dwagner@...e.de>, <himanshu.madhani@...cle.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [EXT] [PATCH v2 -next] scsi: qla2xxx: Fix build error
 implicit-function-declaration

NAK.

Please see these threads for a fix in "trace.h" to address this issue and 
a related discussion.

Most recent (v3) patch posting:
https://lore.kernel.org/linux-scsi/20220907233308.4153-2-aeasi@marvell.com/

Steve suggesting to take the patch via SCSI tree:
https://lore.kernel.org/linux-scsi/20220906174140.41b46a5f@gandalf.local.home/

Hoping this would get a nod soon and can get merged.

Regards,
-Arun

On Mon, 19 Sep 2022, 6:34am, Ren Zhijie wrote:

> External Email
> 
> ----------------------------------------------------------------------
> If CONFIG_TRACING is not set,
> make ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu-,
> will be failed, like this:
> 
> drivers/scsi/qla2xxx/qla_os.c: In function ‘qla_trace_init’:
> drivers/scsi/qla2xxx/qla_os.c:2854:18: error: implicit declaration of function ‘trace_array_get_by_name’; did you mean ‘trace_array_set_clr_event’? [-Werror=implicit-function-declaration]
>   qla_trc_array = trace_array_get_by_name("qla2xxx");
>                   ^~~~~~~~~~~~~~~~~~~~~~~
>                   trace_array_set_clr_event
> drivers/scsi/qla2xxx/qla_os.c:2854:16: error: assignment makes pointer from integer without a cast [-Werror=int-conversion]
>   qla_trc_array = trace_array_get_by_name("qla2xxx");
>                 ^
> drivers/scsi/qla2xxx/qla_os.c: In function ‘qla_trace_uninit’:
> drivers/scsi/qla2xxx/qla_os.c:2869:2: error: implicit declaration of function ‘trace_array_put’; did you mean ‘trace_seq_putc’? [-Werror=implicit-function-declaration]
>   trace_array_put(qla_trc_array);
>   ^~~~~~~~~~~~~~~
>   trace_seq_putc
> cc1: all warnings being treated as errors
> 
> To fix this error, wrap up all the relevant code with CONFIG_TRACING.
> 
> Fixes: 8bfc149ba24c ("scsi: qla2xxx: Enhance driver tracing with separate tunable and more")
> Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
> ---
> Changes in v2:
>  - warp the definition statement of qla_trace_init() and qla_trace_uninit() with CONFIG_TRACING.
> ---
>  drivers/scsi/qla2xxx/qla_os.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
> index 2c85f3cce726..f64063e56f3d 100644
> --- a/drivers/scsi/qla2xxx/qla_os.c
> +++ b/drivers/scsi/qla2xxx/qla_os.c
> @@ -37,7 +37,9 @@ static int apidev_major;
>   */
>  struct kmem_cache *srb_cachep;
>  
> +#ifdef CONFIG_TRACING
>  static struct trace_array *qla_trc_array;
> +#endif
>  
>  int ql2xfulldump_on_mpifail;
>  module_param(ql2xfulldump_on_mpifail, int, S_IRUGO | S_IWUSR);
> @@ -2851,6 +2853,7 @@ static void qla2x00_iocb_work_fn(struct work_struct *work)
>  static void
>  qla_trace_init(void)
>  {
> +#ifdef CONFIG_TRACING
>  	qla_trc_array = trace_array_get_by_name("qla2xxx");
>  	if (!qla_trc_array) {
>  		ql_log(ql_log_fatal, NULL, 0x0001,
> @@ -2859,14 +2862,17 @@ qla_trace_init(void)
>  	}
>  
>  	QLA_TRACE_ENABLE(qla_trc_array);
> +#endif
>  }
>  
>  static void
>  qla_trace_uninit(void)
>  {
> +#ifdef CONFIG_TRACING
>  	if (!qla_trc_array)
>  		return;
>  	trace_array_put(qla_trc_array);
> +#endif
>  }
>  
>  /*
>