SYNC_FILE_RANGE_WAIT_BEFORE
#define VALID_FLAGS (SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE| \
if (flags & SYNC_FILE_RANGE_WAIT_BEFORE) {
SYNC_FILE_RANGE_WAIT_BEFORE | \
SYNC_FILE_RANGE_WAIT_BEFORE | \
SYNC_FILE_RANGE_WAIT_BEFORE | \
SYNC_FILE_RANGE_WAIT_BEFORE | \