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Subject[PATCH 0/2] bio: blk_rq_map_* bounce support fixes
This patchset fixes blk_rq_map_user_iov and blk_rq_map_kern bounce
support, which were introduced in 2.6.26. They can't handle READ
requests that partially completed.

This is against the for-linus branch in the block tree.

I think that we can clean up the code a bit (e.g. bio_copy_kern could
use __bio_copy_iov) but the patches need to go to the stable tree so I
kept the change to a minimum.

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