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From: Janosch Frank <frankja@linux.ibm.com>
To: David Hildenbrand <david@redhat.com>, kvm@vger.kernel.org
Cc: thuth@redhat.com, borntraeger@de.ibm.com, imbrenda@linux.ibm.com,
	cohuck@redhat.com, linux-s390@vger.kernel.org
Subject: Re: [kvm-unit-tests PATCH v4 9/9] s390x: sclp: Add CPU entry offset comment
Date: Wed, 13 Jan 2021 12:06:32 +0100	[thread overview]
Message-ID: <a9b36c6f-f84e-a0b3-d0ef-5f707adbac94@linux.ibm.com> (raw)
In-Reply-To: <6f93c964-9606-246c-7266-85044803e49b@redhat.com>

On 1/13/21 11:25 AM, David Hildenbrand wrote:
> On 12.01.21 14:20, Janosch Frank wrote:
>> Let's make it clear that there is something at the end of the
>> struct. The exact offset is reported by the cpu_offset member.
>>
>> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
>> ---
>>  lib/s390x/sclp.h | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h
>> index dccbaa8..395895f 100644
>> --- a/lib/s390x/sclp.h
>> +++ b/lib/s390x/sclp.h
>> @@ -134,7 +134,10 @@ typedef struct ReadInfo {
>>  	uint8_t reserved7[134 - 128];
>>  	uint8_t byte_134_diag318 : 1;
>>  	uint8_t : 7;
>> -	struct CPUEntry entries[0];
>> +	/*
>> +	 * The cpu entries follow, they start at the offset specified
>> +	 * in offset_cpu.
>> +	 */
> 
> I mean, that's just best practice. At least when I spot "[0];" and the
> end of a struct, I know what's happening.
> 
> No strong opinion about the comment, I wouldn't need it to understand it.

The comment was a wish by Thomas.
Anyway, it doesn't hurt :)

> 
>>  } __attribute__((packed)) ReadInfo;
>>  
>>  typedef struct ReadCpuInfo {
>>
> 
> 


  reply	other threads:[~2021-01-13 11:08 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-12 13:20 [kvm-unit-tests PATCH v4 0/9] s390x: Add SIE library and simple tests Janosch Frank
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 1/9] s390x: Add test_bit to library Janosch Frank
2021-01-14 13:55   ` Claudio Imbrenda
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 2/9] s390x: Consolidate sclp read info Janosch Frank
2021-01-14 13:57   ` Claudio Imbrenda
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 3/9] s390x: SCLP feature checking Janosch Frank
2021-01-13 11:02   ` Cornelia Huck
2021-01-14 13:47   ` Claudio Imbrenda
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 4/9] s390x: Split assembly into multiple files Janosch Frank
2021-01-13 11:04   ` Cornelia Huck
2021-01-13 12:04   ` Thomas Huth
2021-01-13 12:15     ` Janosch Frank
2021-01-14  8:54       ` Thomas Huth
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 5/9] s390x: sie: Add SIE to lib Janosch Frank
2021-01-13 12:44   ` Thomas Huth
2021-01-13 13:34     ` Janosch Frank
2021-01-14 14:43   ` Claudio Imbrenda
2021-01-14 15:03     ` Janosch Frank
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 6/9] s390x: sie: Add first SIE test Janosch Frank
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 7/9] s390x: Add diag318 intercept test Janosch Frank
2021-01-13 11:12   ` Cornelia Huck
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 8/9] s390x: Fix sclp.h style issues Janosch Frank
2021-01-12 13:20 ` [kvm-unit-tests PATCH v4 9/9] s390x: sclp: Add CPU entry offset comment Janosch Frank
2021-01-12 15:51   ` Thomas Huth
2021-01-13 10:25   ` David Hildenbrand
2021-01-13 11:06     ` Janosch Frank [this message]
2021-01-13 11:09     ` Cornelia Huck
2021-01-13 13:16     ` Thomas Huth
2021-01-14 14:45   ` Claudio Imbrenda
2021-01-18  9:43 ` [kvm-unit-tests PATCH v4 0/9] s390x: Add SIE library and simple tests Janosch Frank

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