Re: [PATCH] block: clarify that bio_add_page() and related helpers can add multi pages

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On 3/27/19 9:50 PM, Ming Lei wrote:
> bio_add_page() and __bio_add_page() are capable of adding pages into
> bio, and now we have at least two such usages alreay:
> 
> 	- __bio_iov_bvec_add_pages()
> 	- nvmet_bdev_execute_rw().
> 
> So update comments on these two helpers.
> 
> The thing is a bit special for __bio_try_merge_page(), given the caller
> needs to know if the new added page is same with the last added page,
> then it isn't safe to pass multi-page in case that 'same_page' is true,
> so adds warning on potential misuse, and updates comment on
> __bio_try_merge_page().

This is going to create a needless conflict between 5.1 and the 5.2
block tree. I haven't pushed the 5.2 tree out yet, plan to do so
this week after I've pushed the current 5.1 patches. Can you respin
this one on top of for-5.2/block when it comes out?

-- 
Jens Axboe




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