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The use of kmap() is being deprecated in favor of kmap_local_page() where it is feasible. With kmap_local_page(), the mapping is per thread, CPU local and not globally visible. Therefore rtsx_stor_access_xfer_buf() is a function where the use of kmap_local_page() in place of kmap() is correctly suited. Convert to kmap_local_page() but, instead of open coding it, use the helpers memcpy_to_page() and memcpy_from_page(). Make a minor change to a comment related to scatter-gather. Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com> Link: https://lore.kernel.org/r/20220330143331.8306-1-fmdefrancesco@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>