tree b8e9e4cf41c1aa3bc463512d83f9182ec93419ad
parent f22acf82746dd3d75e06d7c5801926d3b9c50169
author Dave Jiang <dave.jiang@intel.com> 1524170383 -0700
committer Dan Williams <dan.j.williams@intel.com> 1524175910 -0700

device-dax: allow MAP_SYNC to succeed

MAP_SYNC is a nop for device-dax. Allow MAP_SYNC to succeed on device-dax
to eliminate special casing between device-dax and fs-dax as to when the
flag can be specified. Device-dax users already implicitly assume that they do
not need to call fsync(), and this enables them to explicitly check for this
capability.

Cc: <stable@vger.kernel.org>
Fixes: b6fb293f2497 ("mm: Define MAP_SYNC and VM_SYNC flags")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>