[dm-devel] [PATCH v5 00/20] bio: check return values of bio_add_page

[Johannes Thumshirn]

On 02.05.23 12:20, Johannes Thumshirn wrote:
> We have two functions for adding a page to a bio, __bio_add_page() which is
> used to add a single page to a freshly created bio and bio_add_page() which is
> used to add a page to an existing bio.
> 
> While __bio_add_page() is expected to succeed, bio_add_page() can fail.
> 
> This series converts the callers of bio_add_page() which can easily use
> __bio_add_page() to using it and checks the return of bio_add_page() for
> callers that don't work on a freshly created bio.
> 
> Lastly it marks bio_add_page() as __must_check so we don't have to go again
> and audit all callers.
> 
> Changes to v4:
> - Rebased onto latest Linus' master
> - Dropped already merged patches
> - Added Sergey's Reviewed-by
> 
> Changes to v3:
> - Added __bio_add_folio and use it in iomap (Willy)
> - Mark bio_add_folio must check (Willy)
> - s/GFS/GFS2/ (Andreas)
> 
> Changes to v2:
> - Removed 'wont fail' comments pointed out by Song
> 
> Changes to v1:
> - Removed pointless comment pointed out by Willy
> - Changed commit messages pointed out by Damien
> - Colledted Damien's Reviews and Acks

Jens any comments on this?