• K
    block: Kill bio_segments()/bi_vcnt usage · 458b76ed
    Kent Overstreet 提交于
    When we start sharing biovecs, keeping bi_vcnt accurate for splits is
    going to be error prone - and unnecessary, if we refactor some code.
    
    So bio_segments() has to go - but most of the existing users just needed
    to know if the bio had multiple segments, which is easier - add a
    bio_multiple_segments() for them.
    
    (Two of the current uses of bio_segments() are going to go away in a
    couple patches, but the current implementation of bio_segments() is
    unsafe as soon as we start doing driver conversions for immutable
    biovecs - so implement a dumb version for bisectability, it'll go away
    in a couple patches)
    Signed-off-by: NKent Overstreet <kmo@daterainc.com>
    Cc: Jens Axboe <axboe@kernel.dk>
    Cc: Neil Brown <neilb@suse.de>
    Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com>
    Cc: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
    Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
    458b76ed
bio.c 48.4 KB