Re: [PATCH] target: don't call an unmap callback if a range length is zero

Hi Andrei, Apologies for the delayed follow up. On Wed, 2017-12-13 at 13:55 -0800, Andrei Vagin wrote: > If a length of a range is zero, it means there is nothing to unmap > and we can skip this range. > > Here is one more reason, why we have to skip such ranges. An unmap > callback calls file_

[PATCH] target: don't call an unmap callback if a range length is zero

If a length of a range is zero, it means there is nothing to unmap and we can skip this range. Here is one more reason, why we have to skip such ranges. An unmap callback calls file_operations->fallocate(), but the man page for the fallocate syscall says that fallocate(fd, mode, offset, let) retu