[PATCH v3 10/19] fs/kernel_read_file: Add file_size output argument

[Mimi Zohar]

On Fri, 2020-07-24 at 14:36 -0700, Kees Cook wrote:
> In preparation for adding partial read support, add an optional output
> argument to kernel_read_file*() that reports the file size so callers
> can reason more easily about their reading progress.
> 
> Acked-by: Scott Branden <scott.branden at broadcom.com>
> Signed-off-by: Kees Cook <keescook at chromium.org>

Reviewed-by: Mimi Zohar <zohar at linux.ibm.com>