tree aaffaa424060a86b218e9c230a76e823467efa53
parent 0781e79eb206a62c30cc3eff75aaa889cd85b276
author Ming Lei <ming.lei@canonical.com> 1464615271 +0800
committer Jens Axboe <axboe@fb.com> 1465488167 -0600

block: mark 1st parameter of bvec_iter_advance as const

bvec_iter_advance() only writes the parameter of iterator,
so the base address of bvec can be marked as const safely.

Without the change, we can see compiling warning in the
following patch for implementing iterate_bvec(): lib/iov_iter.c
with bvec iterator.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Tested-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>