Re: [PATCH 02/11] mm: call import_iovec() instead of rw_copy_check_uvector() in process_vm_rw()

Matthew Wilcox
2020-09-21T14:48:25Z

On Mon, Sep 21, 2020 at 04:34:25PM +0200, Christoph Hellwig wrote:
> {
> - WARN_ON(direction & ~(READ | WRITE));
> + WARN_ON(direction & ~(READ | WRITE | CHECK_IOVEC_ONLY));

This is now a no-op because:

include/linux/fs.h:#define CHECK_IOVEC_ONLY -1

I'd suggest we renumber it to 2?

(READ is 0, WRITE is 1. This WARN_ON should probably be