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authorDave Chinner <david@fromorbit.com>2012-04-23 15:58:52 +1000
committerBen Myers <bpm@sgi.com>2012-05-14 16:20:48 -0500
commitaa0e8833b05cbd9d34d6a1ddaf23a74a58d76a03 (patch)
tree72592f1fec3df30dea526f793416b56b8d133234 /fs/nfs
parent4e94b71b7068b4bd9c615301197e09dbf0c3b770 (diff)
downloadlinux-aa0e8833b05cbd9d34d6a1ddaf23a74a58d76a03.tar.bz2
xfs: use blocks for storing the desired IO size
Now that we pass block counts everywhere, and index buffers by block number and length in units of blocks, convert the desired IO size into block counts rather than bytes. Convert the code to use block counts, and those that need byte counts get converted at the time of use. Rename the b_desired_count variable to something closer to it's purpose - b_io_length - as it is only used to specify the length of an IO for a subset of the buffer. The only time this is used is for log IO - both writing iclogs and during log recovery. In all other cases, the b_io_length matches b_length, and hence a lot of code confuses the two. e.g. the buf item code uses the io count exclusively when it should be using the buffer length. Fix these apprpriately as they are found. Also, remove the XFS_BUF_{SET_}COUNT() macros that are just wrappers around the desired IO length. They only serve to make the code shouty loud, don't actually add any real value, and are often used incorrectly. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
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