Re: [PATCH v2] scsi: sd_zbc: trace zone append emulation

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On 26.11.22 03:35, Damien Le Moal wrote:
> On 11/26/22 11:18, Martin K. Petersen wrote:
>>
>> Johannes,
>>
>>>>>> ERROR: modpost: "__tracepoint_scsi_prepare_zone_append" [drivers/scsi/sd_mod.ko] undefined!
>>>>>> ERROR: modpost: "__SCK__tp_func_scsi_prepare_zone_append" [drivers/scsi/sd_mod.ko] undefined!
>>>>>> ERROR: modpost: "__SCK__tp_func_scsi_zone_wp_update" [drivers/scsi/sd_mod.ko] undefined!
>>>>>> ERROR: modpost: "__SCT__tp_func_scsi_zone_wp_update" [drivers/scsi/sd_mod.ko] undefined!
>>>>>> ERROR: modpost: "__tracepoint_scsi_zone_wp_update" [drivers/scsi/sd_mod.ko] undefined!
>>>>>> ERROR: modpost: "__SCT__tp_func_scsi_prepare_zone_append" [drivers/scsi/sd_mod.ko] undefined!
>>>>
>>>
>>> I have no clue what modpost is trying to tell me here. These tracepoints aren't
>>> in any way different to the other tracepoints in SCSI.
>>
>> Haven't investigated. But I get the same errors building scsi-staging
>> with your patch applied. Builds fine without it. gcc 12.1.
>>
> 
> This is missing:
> 
> diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c
> index 41a950075913..224b38c0fb0f 100644
> --- a/drivers/scsi/scsi_trace.c
> +++ b/drivers/scsi/scsi_trace.c
> @@ -389,3 +389,4 @@ scsi_trace_parse_cdb(struct trace_seq *p, unsigned
> char *cdb, int len)
>                 return scsi_trace_misc(p, cdb, len);
>         }
>  }
> +EXPORT_SYMBOL(scsi_trace_parse_cdb);
> diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
> index 956d1982c51b..e7a0e1ace6d0 100644
> --- a/drivers/scsi/sd_zbc.c
> +++ b/drivers/scsi/sd_zbc.c
> @@ -18,6 +18,7 @@
>  #include <scsi/scsi.h>
>  #include <scsi/scsi_cmnd.h>
> 
> +#define CREATE_TRACE_POINTS
>  #include <trace/events/scsi.h>
> 
>  #include "sd.h"
> 
> With that, it compiles fine.
> 

Thanks, but for me it doesn't when I have scsi_mod builtin,
only as a module :(
If I remove the CREATE_TRACE_POINTS hunk it compiles again as
builtin but breaks as module :(





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