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由 Dave Jiang 提交于
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: b6fb293f ("mm: Define MAP_SYNC and VM_SYNC flags") Signed-off-by: NDave Jiang <dave.jiang@intel.com> Reviewed-by: NDan Williams <dan.j.williams@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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