Re: [PATCH v5 4/5] fs, xfs: introduce MAP_DIRECT for creating block-map-atomic file ranges
- From
- Kirill A. Shutemov <hidden>
- Date
- 2017-08-16 11:12:44
- Also in
- linux-fsdevel, linux-mm, linux-xfs, lkml, nvdimm
- Reply to
- Dan Williams, 2017-08-16
On Wed, Aug 16, 2017 at 12:44:28AM -0700, Dan Williams wrote:
quoted hunk ↗ jump to hunk
@@ -1411,6 +1422,9 @@ unsigned long do_mmap(struct file *file, unsigned long addr, /* fall through */ case MAP_PRIVATE: + if ((flags & (MAP_PRIVATE|MAP_DIRECT)) + == (MAP_PRIVATE|MAP_DIRECT)) + return -EINVAL;
We've already checked for MAP_PRIVATE in this codepath. Simple (flags &
MAP_DIRECT) would be enough.
--
Kirill A. Shutemov