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H A Dvdi.ca7a43aa1 Mon Mar 19 17:07:49 GMT 2012 Paolo Bonzini <pbonzini@redhat.com> vdi: leave bounce buffering to block layer

vdi.c really works as if it implemented bdrv_read and bdrv_write. However,
because only vector I/O is supported by the asynchronous callbacks, it
went through extra pain to bounce-buffer the I/O. This can be handled
by the block layer now that the format is coroutine-based.

Acked-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>