Re: [PATCH] block: ensure that struct blk_mq_alloc_data is fully initialized

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On 4/15/25 9:50 AM, Bart Van Assche wrote:
> On 4/15/25 7:51 AM, Jens Axboe wrote:
>> On x86, rep stos will be emitted to clear the the blk_mq_alloc_data
>> struct, as not all members are being initialied.
> 
> "Partial initialization" never happens in the C language when
> initializing a data structure. If a data structure is initialized,
> members that have not been specified are initialized to zero (the
> compiler is not required to initialize padding bytes). In other words,
> the description of this patch needs to be improved.

How is the description inaccurate? As not all members are being
explicitly initialized, rep stos is emitted to do so.

-- 
Jens Axboe




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