const golang.org/x/sys/unix.FALLOC_FL_KEEP_SIZE

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L1181: 	FALLOC_FL_KEEP_SIZE                         = 0x1

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)