This patch fixes the LEDE build on mounted NFSv4 shares. The lock file cannot be opened in read-write mode by default, because then we cannot use flock(1) to lock executable files. The read-write mode for lock files is necessary on NFSv4 where flock(2) is emulated by by fcntl() -- this situation is possible to detect by flock(2) EBADF error. The patch consist of the following util-linux/flock commits http://git.kernel.org/cgit/utils/util-linux/util-linux.git/commit/?id=eb742a1f66d5e3a7c5b43efce741c113f51bef3b http://git.kernel.org/cgit/utils/util-linux/util-linux.git/commit/?id=caf1ba11a367ad702fb774653daf9ebdcca49d7b without including the pre kernel 3.4 support. Signed-off-by: Mathias Kresin <dev@kresin.me> Signed-off-by: Felix Fietkau <nbd@nbd.name> [minor cleanup]