tree cd50fb73997130df5bd87700861aae7663702ed4
parent 6fe7b9901400152238e1b76198747f6716c78aad
author Christoph Hellwig <hch@lst.de> 1568932365 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1568932365 -0700

iomap: move the iomap_dio_rw ->end_io callback into a structure

Add a new iomap_dio_ops structure that for now just contains the end_io
handler.  This avoid storing the function pointer in a mutable structure,
which is a possible exploit vector for kernel code execution, and prepares
for adding a submit_io handler that btrfs needs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>