direct-io: separate map_bh from dio
Only a single b_private field in the map_bh buffer head is needed after the submission path. Move map_bh separately to avoid storing this information in the long term slab. This avoids the weird 104 byte hole in struct dio_submit which also needed to be memseted early. Signed-off-by:Andi Kleen <ak@linux.intel.com> Signed-off-by:
Christoph Hellwig <hch@lst.de>
parent
6e8267f5
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